Analysis

  • max time kernel
    149s
  • max time network
    148s
  • 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, 11:32

General

  • Target

    JaffaCakes118_25a7e92820a8ca1e5571bc5a546fdee8.exe

  • Size

    811KB

  • MD5

    25a7e92820a8ca1e5571bc5a546fdee8

  • SHA1

    fc6d6c499b5fc213093d3470c8a3a2af7bd83a54

  • SHA256

    26f9f8ca45e78dc6649bde7867fba0b5e76534ed8cfa176b096b06c0b0db7864

  • SHA512

    085e558cc21d10d9cf57a155580ac8e834a62f85ad233c15ee7adb7120a23d78d25754bd94be799ed89f209fd374cd1a6fb8b31309e53927cedc3444f64bef7b

  • SSDEEP

    12288:oaAchpWsuVTv7ItY8XljyypHP7cOLBev03hlULsmWZ++09ZcKDVsgdGO4V:JAEENIq8XwyVPQclDq/+WnpsSM

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

windowsconnect.no-ip.biz:1604

Mutex

DC_MUTEX-57WVE57

Attributes
  • InstallPath

    Windupdt\winupdate.exe

  • gencode

    jka3Rd.�*-Ay

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • 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
  • Windows security bypass 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Windows security modification 2 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

  • Checks processor information in registry 2 TTPs 8 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25a7e92820a8ca1e5571bc5a546fdee8.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25a7e92820a8ca1e5571bc5a546fdee8.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks BIOS information in registry
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1704
    • C:\Windupdt\winupdate.exe
      "C:\Windupdt\winupdate.exe"
      2⤵
      • Windows security bypass
      • Checks BIOS information in registry
      • Executes dropped EXE
      • Windows security modification
      • System Location Discovery: System Language Discovery
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1928

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Windupdt\winupdate.exe

    Filesize

    811KB

    MD5

    25a7e92820a8ca1e5571bc5a546fdee8

    SHA1

    fc6d6c499b5fc213093d3470c8a3a2af7bd83a54

    SHA256

    26f9f8ca45e78dc6649bde7867fba0b5e76534ed8cfa176b096b06c0b0db7864

    SHA512

    085e558cc21d10d9cf57a155580ac8e834a62f85ad233c15ee7adb7120a23d78d25754bd94be799ed89f209fd374cd1a6fb8b31309e53927cedc3444f64bef7b

  • memory/1704-0-0x00000000022C0000-0x00000000022C1000-memory.dmp

    Filesize

    4KB

  • memory/1704-10-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-16-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-18-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-12-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-14-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-15-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-11-0x0000000002180000-0x0000000002181000-memory.dmp

    Filesize

    4KB

  • memory/1928-17-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-13-0x0000000002180000-0x0000000002181000-memory.dmp

    Filesize

    4KB

  • memory/1928-19-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-20-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-21-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-22-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-23-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-24-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-25-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB

  • memory/1928-26-0x0000000000400000-0x00000000004D9000-memory.dmp

    Filesize

    868KB