Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-08-2024 17:50

General

  • Target

    BlackMail.exe

  • Size

    923KB

  • MD5

    cc9acc9e7253ddefeea935cf0e706272

  • SHA1

    f2fa28d60ddae4a90747bec861e6b4ba6e9486a9

  • SHA256

    52a29885926d3bfcfa43bdf9cedde199ad8c20566f60b432cea5b65d82f557f5

  • SHA512

    4aab367331b9dd69d7ae5b520718542f260e1630f291728b19e682d5e737d3428441df65c58946d48e806906566a05e823b5a87ce337bc4923c29d3b87092c64

  • SSDEEP

    12288:O9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hI82gG:aZ1xuVVjfFoynPaVBUR8f+kN10EBpe

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

april-came.gl.at.ply.gg:61838

Mutex

DC_MUTEX-6ZL3QWE

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    iogNsu6a0J2i

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • 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 2 IoCs
  • Adds Run key to start application 2 TTPs 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 7 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 37 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BlackMail.exe
    "C:\Users\Admin\AppData\Local\Temp\BlackMail.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4008
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\BlackMail.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:772
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\BlackMail.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:2380
    • 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:840
      • 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:4860
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • 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
      • System policy modification
      PID:2172
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • System Location Discovery: System Language Discovery
        PID:3352

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

    Filesize

    923KB

    MD5

    cc9acc9e7253ddefeea935cf0e706272

    SHA1

    f2fa28d60ddae4a90747bec861e6b4ba6e9486a9

    SHA256

    52a29885926d3bfcfa43bdf9cedde199ad8c20566f60b432cea5b65d82f557f5

    SHA512

    4aab367331b9dd69d7ae5b520718542f260e1630f291728b19e682d5e737d3428441df65c58946d48e806906566a05e823b5a87ce337bc4923c29d3b87092c64

  • memory/2172-61-0x00000000022D0000-0x00000000022D1000-memory.dmp

    Filesize

    4KB

  • memory/2172-64-0x0000000000400000-0x00000000004F4000-memory.dmp

    Filesize

    976KB

  • memory/3352-62-0x0000000001260000-0x0000000001261000-memory.dmp

    Filesize

    4KB

  • memory/4008-0-0x0000000002300000-0x0000000002301000-memory.dmp

    Filesize

    4KB

  • memory/4008-63-0x0000000000400000-0x00000000004F4000-memory.dmp

    Filesize

    976KB