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Analysis

  • max time kernel
    95s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/01/2025, 19:52

General

  • Target

    JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe

  • Size

    308KB

  • MD5

    2f1a1badc1a79faf8a4a0431c263579b

  • SHA1

    1e6e83589b5bfc0d537f133c4700957f24e8f61e

  • SHA256

    327f07cd24c80890ccb59b357c3b3b43f2677611b79e75a48fea41bd13f9c4bd

  • SHA512

    f2011b65ff171f9bd1f345817ca2b762fc67de8daea13fd3c3faf3515f6a21cd5b3fd6bf3634f7bd579dae8cb708d4915a711823b83704ddb5f26d4f9c902a88

  • SSDEEP

    6144:C0M4E7FBVUlcGFpbUY9R+rBywLWbvOm8b8yhKJgobfKycJ4nu:C3bnVUlcGjZWynvLHygLKyuK

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

severfin.no-ip.biz:10111

Mutex

DC_MUTEX-KW3265T

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    cm7bvMvxrvgA

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 7 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 25 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1216
    • C:\Users\Admin\AppData\Local\Temp\svchost.exe
      C:\Users\Admin\AppData\Local\Temp\svchost.exe
      2⤵
      • Modifies WinLogon for persistence
      • Checks computer location settings
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4748
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3560

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\svchost.exe

    Filesize

    34KB

    MD5

    e118330b4629b12368d91b9df6488be0

    SHA1

    ce90218c7e3b90df2a3409ec253048bb6472c2fd

    SHA256

    3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

    SHA512

    ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

  • memory/1216-0-0x0000000074962000-0x0000000074963000-memory.dmp

    Filesize

    4KB

  • memory/1216-1-0x0000000074960000-0x0000000074F11000-memory.dmp

    Filesize

    5.7MB

  • memory/1216-2-0x0000000074960000-0x0000000074F11000-memory.dmp

    Filesize

    5.7MB

  • memory/1216-18-0x0000000074960000-0x0000000074F11000-memory.dmp

    Filesize

    5.7MB

  • memory/4748-13-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4748-9-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4748-11-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4748-15-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4748-14-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4748-16-0x00000000025C0000-0x00000000025C1000-memory.dmp

    Filesize

    4KB

  • memory/4748-5-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4748-31-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB