Analysis

  • max time kernel
    111s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250217-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/02/2025, 12:11

General

  • Target

    JaffaCakes118_25d94481f4967537d4b75902827e1948.exe

  • Size

    1.1MB

  • MD5

    25d94481f4967537d4b75902827e1948

  • SHA1

    71f72e4679f9918c506b6479870ebf5701d418dc

  • SHA256

    69ec29e540120ba091110e2ff51bddd3b67c5de8eb466959d2bb24316f5e813c

  • SHA512

    608af79380dc6bfb0c42ab07f99346ca0fc1a2ff338382b9ab0de9b359e0165720f08b0e81538eacd5a0a97fef968994253f1f3fdc88ad20cd63fcb11a0cf2ca

  • SSDEEP

    12288:JMmG1c2JW3zHBkdTYHvCicPmvpItUBLZsJ7KLctBhhoeThzvF1pVQ2KO43s9ub45:JCZV+jBItRTVF1dNqhH7jmbyU+ergU

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

127.0.0.1:1604

Mutex

DC_MUTEX-46MKRG6

Attributes
  • InstallPath

    Windupdt\winupdate.exe

  • gencode

    SsSbby=wZDXq

  • install

    true

  • offline_keylogger

    true

  • password

    dreamh4ck

  • persistence

    true

  • reg_key

    winupdater

rc4.plain

Signatures

  • Darkcomet

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

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Modifies registry class 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 24 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25d94481f4967537d4b75902827e1948.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25d94481f4967537d4b75902827e1948.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3252
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      2⤵
      • Modifies WinLogon for persistence
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1432
      • C:\Windupdt\winupdate.exe
        "C:\Windupdt\winupdate.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3672
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 5 > NUL&del "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        • Suspicious use of WriteProcessMemory
        PID:3780
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 5
          4⤵
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:4852

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Windupdt\winupdate.exe

    Filesize

    1.1MB

    MD5

    d881de17aa8f2e2c08cbb7b265f928f9

    SHA1

    08936aebc87decf0af6e8eada191062b5e65ac2a

    SHA256

    b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

    SHA512

    5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

  • memory/1432-3-0x0000000000400000-0x00000000004B3000-memory.dmp

    Filesize

    716KB

  • memory/1432-4-0x0000000000400000-0x00000000004B3000-memory.dmp

    Filesize

    716KB

  • memory/1432-6-0x0000000000400000-0x00000000004B3000-memory.dmp

    Filesize

    716KB

  • memory/1432-8-0x0000000000400000-0x00000000004B3000-memory.dmp

    Filesize

    716KB

  • memory/1432-9-0x0000000000400000-0x00000000004B3000-memory.dmp

    Filesize

    716KB

  • memory/1432-70-0x0000000000400000-0x00000000004B3000-memory.dmp

    Filesize

    716KB

  • memory/3252-0-0x0000000075372000-0x0000000075373000-memory.dmp

    Filesize

    4KB

  • memory/3252-1-0x0000000075370000-0x0000000075921000-memory.dmp

    Filesize

    5.7MB

  • memory/3252-2-0x0000000075370000-0x0000000075921000-memory.dmp

    Filesize

    5.7MB

  • memory/3252-7-0x0000000075370000-0x0000000075921000-memory.dmp

    Filesize

    5.7MB