Analysis

  • max time kernel
    150s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    01-01-2025 08:42

General

  • Target

    JaffaCakes118_4e84418f73d699329bca84d43ca2bc51.exe

  • Size

    318KB

  • MD5

    4e84418f73d699329bca84d43ca2bc51

  • SHA1

    59ed2e9ac35fb3526732cc5873e1a2b37df1dd52

  • SHA256

    87e2472ea39ecbc181be014414641c7eff9d50af85842b3dee2296a1994a1a4d

  • SHA512

    2d288365a5ceedd86c4e4017573d309a773dd41576aba9b2b988623cdb41d875b9057f4fe9c4ee7b2126dc2df6e324b807527fac7e0eff81fe95e06ef37cb072

  • SSDEEP

    6144:/cNYk1yuwEDBum3qYWnl0pd0EX3Zq2b6wfIDYm0P3oUrpXcrPH:/cWkbgTYWnYnt/IDYhP3

Malware Config

Extracted

Family

darkcomet

Botnet

pros

C2

axelcass.noip.me:1604

Mutex

DC_MUTEX-AVPP4NE

Attributes
  • InstallPath

    winlogon.exe

  • gencode

    jREpfFDXm8wo

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    winlogon

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
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 3 IoCs
  • UPX packed file 12 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.

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4e84418f73d699329bca84d43ca2bc51.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4e84418f73d699329bca84d43ca2bc51.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2316
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4e84418f73d699329bca84d43ca2bc51.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2856
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4e84418f73d699329bca84d43ca2bc51.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:2840
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2968
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:2676
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2744
    • C:\Windows\SysWOW64\winlogon.exe
      "C:\Windows\system32\winlogon.exe"
      2⤵
      • Modifies firewall policy service
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2756
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2664

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Windows\SysWOW64\winlogon.exe

    Filesize

    318KB

    MD5

    4e84418f73d699329bca84d43ca2bc51

    SHA1

    59ed2e9ac35fb3526732cc5873e1a2b37df1dd52

    SHA256

    87e2472ea39ecbc181be014414641c7eff9d50af85842b3dee2296a1994a1a4d

    SHA512

    2d288365a5ceedd86c4e4017573d309a773dd41576aba9b2b988623cdb41d875b9057f4fe9c4ee7b2126dc2df6e324b807527fac7e0eff81fe95e06ef37cb072

  • memory/2316-71-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2316-24-0x0000000004300000-0x00000000043D8000-memory.dmp

    Filesize

    864KB

  • memory/2316-1-0x00000000003E0000-0x00000000003E1000-memory.dmp

    Filesize

    4KB

  • memory/2316-0-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2316-29-0x0000000004300000-0x00000000043D8000-memory.dmp

    Filesize

    864KB

  • memory/2664-70-0x0000000000030000-0x0000000000031000-memory.dmp

    Filesize

    4KB

  • memory/2744-5-0x0000000000080000-0x0000000000081000-memory.dmp

    Filesize

    4KB

  • memory/2744-20-0x0000000000190000-0x0000000000191000-memory.dmp

    Filesize

    4KB

  • memory/2756-73-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2756-74-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2756-75-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2756-76-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2756-77-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2756-78-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2756-79-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2756-80-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB