Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    27/02/2025, 00:01

General

  • Target

    JaffaCakes118_29639edc08702e91c7e4fa3f73adaa0b.exe

  • Size

    1.4MB

  • MD5

    29639edc08702e91c7e4fa3f73adaa0b

  • SHA1

    355ab1e0bd2b377d879f6d2fc0f32ec060d788b8

  • SHA256

    161140b3b7c0f370bc98c8c5047edc4db2bef762b682bcb3c51b35c853bee4aa

  • SHA512

    d83a0655e9ff779bcb86bf2a39e9594fcfe5d9774c058f49d77e06e23a75cf01079c31df45835730b6931673f7fd7914f59c2203ce336cdde967ca6169bd711f

  • SSDEEP

    24576:BRmJkcoQricOIQxiZY1jaeBcTlNLuJVC6CZJDvarkYtBBa6i0D:uJZoQrbTFZY1jaeBcTlNCO6g9vaY6QOD

Malware Config

Extracted

Family

darkcomet

Attributes
  • gencode

  • install

    false

  • offline_keylogger

    false

  • persistence

    false

rc4.plain

Extracted

Family

darkcomet

Botnet

Server

C2

zcto.zapto.org:1604

Mutex

DC_MUTEX-FYTWRUF

Attributes
  • InstallPath

    Explorer\Explorer.exe

  • gencode

    vMjrDJ6jv5VW

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    Explorer

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 2 IoCs
  • Disables RegEdit via registry modification 1 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 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 3 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 10 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 64 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_29639edc08702e91c7e4fa3f73adaa0b.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_29639edc08702e91c7e4fa3f73adaa0b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2088
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_29639edc08702e91c7e4fa3f73adaa0b.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_29639edc08702e91c7e4fa3f73adaa0b.exe"
      2⤵
      • 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:2296
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_29639edc08702e91c7e4fa3f73adaa0b.exe" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2644
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_29639edc08702e91c7e4fa3f73adaa0b.exe" +s +h
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:1856
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2704
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:2848
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • Deletes itself
        • System Location Discovery: System Language Discovery
        PID:2772
      • C:\Windows\SysWOW64\Explorer\Explorer.exe
        "C:\Windows\system32\Explorer\Explorer.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2684
        • C:\Windows\SysWOW64\Explorer\Explorer.exe
          "C:\Windows\SysWOW64\Explorer\Explorer.exe"
          4⤵
          • Modifies firewall policy service
          • Modifies security service
          • Windows security bypass
          • Disables RegEdit via registry modification
          • Executes dropped EXE
          • Windows security modification
          • 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
          • System policy modification
          PID:2592
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
            • System Location Discovery: System Language Discovery
            PID:2744

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\pmnqfpy

    Filesize

    9KB

    MD5

    d697670008a46afc5a8fcaf4c3393418

    SHA1

    47d20a45c524f81de13595fc607e1f280dc6f669

    SHA256

    3c23d80dd0bef33901df0b9f2c73fa93e9e38e8fbc6f435f63365fb2d92e62f9

    SHA512

    042bf4fbfb23f679f02b02c0746ccc34594a1b9420e22417930763809fdc58c37b9d1de903095eed790a2f35c7e1fe6ecbd5125c26c1e0a83d209b0d9b521e36

  • C:\Windows\SysWOW64\Explorer\Explorer.exe

    Filesize

    1.4MB

    MD5

    29639edc08702e91c7e4fa3f73adaa0b

    SHA1

    355ab1e0bd2b377d879f6d2fc0f32ec060d788b8

    SHA256

    161140b3b7c0f370bc98c8c5047edc4db2bef762b682bcb3c51b35c853bee4aa

    SHA512

    d83a0655e9ff779bcb86bf2a39e9594fcfe5d9774c058f49d77e06e23a75cf01079c31df45835730b6931673f7fd7914f59c2203ce336cdde967ca6169bd711f

  • memory/2296-11-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-27-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-21-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-19-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-17-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-13-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-7-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-24-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-25-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-23-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-26-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-28-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-139-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-9-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2296-15-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2772-60-0x0000000000190000-0x0000000000191000-memory.dmp

    Filesize

    4KB

  • memory/2772-32-0x00000000000C0000-0x00000000000C1000-memory.dmp

    Filesize

    4KB