Analysis

  • max time kernel
    150s
  • 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, 17:57

General

  • Target

    JaffaCakes118_27a577ebf60199ecba7d20e0d4f3bb4a.exe

  • Size

    439KB

  • MD5

    27a577ebf60199ecba7d20e0d4f3bb4a

  • SHA1

    66350aa45a0a836fb2707097318259bad9049517

  • SHA256

    e2e583c859826ea44c7571d0f44fb2ff315af4f2a1f2d2c6aeba2a7ae3973d3e

  • SHA512

    4c4d4db4d3607a501432391b8428dd588f0701971442749061ccdb6ecd263e51aace82648bf252e2e2c97398e69f30ef2b2f83a6b3f3cdd1f89b959b0d914b64

  • SSDEEP

    12288:JLgy/aQ1YifJQHj0cygZeieIthc3khXbTOmifI:JLgyZfc0lggiDthBR/DMI

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

holawhey.no-ip.biz:100

Mutex

DC_MUTEX-B0CSUFZ

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    pw8fRH0AM4TB

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

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
  • Modifies firewall policy service 3 TTPs 3 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 1 IoCs
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Windows security modification 2 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • UPX packed file 25 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 8 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_27a577ebf60199ecba7d20e0d4f3bb4a.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_27a577ebf60199ecba7d20e0d4f3bb4a.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1592
    • C:\Users\Admin\AppData\Local\Temp\Crypted.exe
      "C:\Users\Admin\AppData\Local\Temp\Crypted.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5084
      • C:\Users\Admin\AppData\Local\Temp\Stage2.exe
        "C:\Users\Admin\AppData\Local\Temp\Stage2.exe" x -y -oC:\Users\Admin\AppData\Local\Temp -pxnq8rPMxVI87ciGwWJHxRTy3iauHcIirteOOELv3B5vkS9kJoHBUAahY1dWxj8yA
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3392
      • C:\Users\Admin\AppData\Local\Temp\Stage1.exe
        "C:\Users\Admin\AppData\Local\Temp\Stage1.exe"
        3⤵
        • Modifies WinLogon for persistence
        • Checks computer location settings
        • Executes dropped EXE
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1472
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\Stage1.exe" +s +h
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2832
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp\Stage1.exe" +s +h
            5⤵
            • Sets file to hidden
            • System Location Discovery: System Language Discovery
            • Views/modifies file attributes
            PID:3964
        • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\MSDCSC\msdcsc.exe
          "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\MSDCSC\msdcsc.exe"
          4⤵
          • Modifies firewall policy service
          • Modifies security service
          • Windows security bypass
          • Executes dropped EXE
          • Windows security modification
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2304
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
            • System Location Discovery: System Language Discovery
            PID:904

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    403KB

    MD5

    133f59b4fa4393eef2766d72ea5f4a00

    SHA1

    3a33ea8e9c446385d5cf01e47439308c434e67a4

    SHA256

    b959e80f8de1d37cdf89c1c4b008405db4b9930a2ab1bf93c3201847e2d7421e

    SHA512

    f1c1b2ace3ef629245df3f5e5395243fea9a33769a725f471b84911266e2f7b299bc556ff2afb9e9aa464c962a05ed38dd30e34595e9859bbb7e638ff0357cd4

  • C:\Users\Admin\AppData\Local\Temp\Stage1.exe

    Filesize

    252KB

    MD5

    a0dff5b8cab088e99c2b4a48df7df81a

    SHA1

    b3c202e661515bb06eb05dc1c5dce95022bfcbc7

    SHA256

    68ba7280939a788da4efdf1667582fb11af99c737601a70e7c625a94afbb3e9a

    SHA512

    f98cc3a05139b61b9b1f805813c78867eee68c2e5749daba7906ce78e1665d5c2339cba1b77c95d6d8f2e10df36f92095f5d31d94d652abb0e1a15c3be6ca866

  • C:\Users\Admin\AppData\Local\Temp\Stage2.exe

    Filesize

    356KB

    MD5

    3f6c9f4e2b46b1db1927ae37d0fff55f

    SHA1

    eb687968cccb0a640ccce2d8c32c942d1edeb9e8

    SHA256

    59865e45a20ade01259451928f875fe7ed18f5794d51d4caa67851c7b75987f2

    SHA512

    9df211db0fcc77ce85ec92a027c103ce3473712faa3aa4689d6115e26d4dec0f7659d6682fef705a1c140b8e227b393a39382bc167d4c1d963ba50dbf9d816ed

  • memory/904-93-0x00000000005E0000-0x00000000005E1000-memory.dmp

    Filesize

    4KB

  • memory/1472-31-0x0000000000AA0000-0x0000000000AA1000-memory.dmp

    Filesize

    4KB

  • memory/1472-95-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/1472-30-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-98-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-106-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-112-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-111-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-110-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-109-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-99-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-100-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-101-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-102-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-103-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-104-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-105-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-92-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-107-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2304-108-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/3392-23-0x0000000000400000-0x0000000000443000-memory.dmp

    Filesize

    268KB

  • memory/3392-27-0x0000000000400000-0x0000000000443000-memory.dmp

    Filesize

    268KB

  • memory/5084-10-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/5084-97-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB