Analysis

  • max time kernel
    188s
  • max time network
    191s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-11-2022 12:58

General

  • Target

    d925123b49f1202422b46e8d3db2941d96d5c33970aa74a58055f15d644958ca.exe

  • Size

    838KB

  • MD5

    1eb1d37928ffa971a4c74c965bc9e88e

  • SHA1

    d3d3cb7b02d7c2699650b4adb19cd4d41c8cfe45

  • SHA256

    d925123b49f1202422b46e8d3db2941d96d5c33970aa74a58055f15d644958ca

  • SHA512

    ccd895d36ac7a8136e739b99e78820447a3d739797cdf517cf407642af0ae2511fce3cbfafe461c1e1280f4ac64cb455a4dc78c6f29f06a8c7f6fd8fba514a98

  • SSDEEP

    12288:qoxy8TP40QeYKbQ4wgMUMDSH+Mf3vW9RLGAcypv69CiGc1uWxU8p557:qWtTP4a1dMDSHytGvMY/qOUa55

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16_min

C2

customersservicebx.uni.me:2121

Mutex

DCMIN_MUTEX-UZ6AB7L

Attributes
  • gencode

    s8XX3Rqr3xKD

  • install

    false

  • offline_keylogger

    true

  • persistence

    false

Signatures

  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 51 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d925123b49f1202422b46e8d3db2941d96d5c33970aa74a58055f15d644958ca.exe
    "C:\Users\Admin\AppData\Local\Temp\d925123b49f1202422b46e8d3db2941d96d5c33970aa74a58055f15d644958ca.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2220
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:216
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\WUDHost.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\WUDHost.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2884
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Acctres.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Acctres.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1812
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
          "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1112
        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\WUDHost.exe
          "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\WUDHost.exe"
          4⤵
          • Executes dropped EXE
          PID:4268

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scripting

1
T1064

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Scripting

1
T1064

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\WUDHost.exe.log
    Filesize

    128B

    MD5

    a5dcc7c9c08af7dddd82be5b036a4416

    SHA1

    4f998ca1526d199e355ffb435bae111a2779b994

    SHA256

    e24033ceec97fd03402b03acaaabd1d1e378e83bb1683afbccac760e00f8ead5

    SHA512

    56035de734836c0c39f0b48641c51c26adb6e79c6c65e23ca96603f71c95b8673e2ef853146e87efc899dd1878d0bbc2c82d91fbf0fce81c552048e986f9bb5a

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Acctres.exe
    Filesize

    838KB

    MD5

    1eb1d37928ffa971a4c74c965bc9e88e

    SHA1

    d3d3cb7b02d7c2699650b4adb19cd4d41c8cfe45

    SHA256

    d925123b49f1202422b46e8d3db2941d96d5c33970aa74a58055f15d644958ca

    SHA512

    ccd895d36ac7a8136e739b99e78820447a3d739797cdf517cf407642af0ae2511fce3cbfafe461c1e1280f4ac64cb455a4dc78c6f29f06a8c7f6fd8fba514a98

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Acctres.exe
    Filesize

    838KB

    MD5

    1eb1d37928ffa971a4c74c965bc9e88e

    SHA1

    d3d3cb7b02d7c2699650b4adb19cd4d41c8cfe45

    SHA256

    d925123b49f1202422b46e8d3db2941d96d5c33970aa74a58055f15d644958ca

    SHA512

    ccd895d36ac7a8136e739b99e78820447a3d739797cdf517cf407642af0ae2511fce3cbfafe461c1e1280f4ac64cb455a4dc78c6f29f06a8c7f6fd8fba514a98

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\WUDHost.exe
    Filesize

    7KB

    MD5

    2c62f37716a62494ce5f45810719a3fc

    SHA1

    2887e7d8db8ad0bbc0cbe9de6c8359185c80c04d

    SHA256

    51a00bf16cd01366357158cb76090db39af00bd839945f435b751f8b8037d07c

    SHA512

    c10b8e2fb53522a2b816b1d9703799654ff0396c6f4b85fd5c0d7567e520f023e4fcf50658fac928ca7c472d17d345e246b4c78a5d04e2572b68d4ecb128e667

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\WUDHost.exe
    Filesize

    7KB

    MD5

    2c62f37716a62494ce5f45810719a3fc

    SHA1

    2887e7d8db8ad0bbc0cbe9de6c8359185c80c04d

    SHA256

    51a00bf16cd01366357158cb76090db39af00bd839945f435b751f8b8037d07c

    SHA512

    c10b8e2fb53522a2b816b1d9703799654ff0396c6f4b85fd5c0d7567e520f023e4fcf50658fac928ca7c472d17d345e246b4c78a5d04e2572b68d4ecb128e667

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\WUDHost.exe
    Filesize

    7KB

    MD5

    2c62f37716a62494ce5f45810719a3fc

    SHA1

    2887e7d8db8ad0bbc0cbe9de6c8359185c80c04d

    SHA256

    51a00bf16cd01366357158cb76090db39af00bd839945f435b751f8b8037d07c

    SHA512

    c10b8e2fb53522a2b816b1d9703799654ff0396c6f4b85fd5c0d7567e520f023e4fcf50658fac928ca7c472d17d345e246b4c78a5d04e2572b68d4ecb128e667

  • memory/216-138-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/216-135-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/216-134-0x0000000000000000-mapping.dmp
  • memory/216-137-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/216-136-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1112-155-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1112-150-0x0000000000000000-mapping.dmp
  • memory/1812-147-0x0000000074D60000-0x0000000075311000-memory.dmp
    Filesize

    5.7MB

  • memory/1812-145-0x0000000000000000-mapping.dmp
  • memory/1812-148-0x0000000074D60000-0x0000000075311000-memory.dmp
    Filesize

    5.7MB

  • memory/2220-152-0x0000000074D60000-0x0000000075311000-memory.dmp
    Filesize

    5.7MB

  • memory/2220-132-0x0000000074D60000-0x0000000075311000-memory.dmp
    Filesize

    5.7MB

  • memory/2220-133-0x0000000074D60000-0x0000000075311000-memory.dmp
    Filesize

    5.7MB

  • memory/2884-139-0x0000000000000000-mapping.dmp
  • memory/2884-149-0x0000000074D60000-0x0000000075311000-memory.dmp
    Filesize

    5.7MB

  • memory/2884-143-0x0000000074D60000-0x0000000075311000-memory.dmp
    Filesize

    5.7MB

  • memory/2884-142-0x0000000074D60000-0x0000000075311000-memory.dmp
    Filesize

    5.7MB

  • memory/4268-156-0x0000000000000000-mapping.dmp
  • memory/4268-159-0x0000000074D60000-0x0000000075311000-memory.dmp
    Filesize

    5.7MB