Analysis

  • max time kernel
    149s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-04-2024 09:24

General

  • Target

    f9ffef8cc5c3608c3b4b03f3ab3693a4_JaffaCakes118.exe

  • Size

    732KB

  • MD5

    f9ffef8cc5c3608c3b4b03f3ab3693a4

  • SHA1

    f85e2745ce0f2f404d97236cd5a751f931e4a3ff

  • SHA256

    e3211bb4471cb96576a110f6f81779acaa742d8a6732191bcec307c317dec612

  • SHA512

    fa9d89cf9813db7ec65b6c5f266938ebe2653216cbf272e3095727e70a559f93292028f845161021c1ae85da691bbd764b2ea47ee8a19cc88cfdcb188f0deadb

  • SSDEEP

    6144:/f9mhu3Ch4Wr5QlAFydXnzg8Ynu2NVwnxD6qmSMD05ceHo2qtOasCppppppbLLLE:/f9mk84Wr5XodXzgNu5nxDsS4GIps

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

steaminformation.no-ip.biz:1177

Mutex

DC_MUTEX-DNU7BFF

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    1ALxCPeHcaCS

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    ChromeUpdater

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 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.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • UPX packed file 16 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f9ffef8cc5c3608c3b4b03f3ab3693a4_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\f9ffef8cc5c3608c3b4b03f3ab3693a4_JaffaCakes118.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3672
    • C:\Users\Admin\AppData\Local\Temp\f9ffef8cc5c3608c3b4b03f3ab3693a4_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\f9ffef8cc5c3608c3b4b03f3ab3693a4_JaffaCakes118.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2368
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\f9ffef8cc5c3608c3b4b03f3ab3693a4_JaffaCakes118.exe" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1716
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\f9ffef8cc5c3608c3b4b03f3ab3693a4_JaffaCakes118.exe" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:5072
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4228
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:4552
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • Deletes itself
        PID:2096
      • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
        "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1020
        • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
          "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:852
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
              PID:2648

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

      Filesize

      732KB

      MD5

      f9ffef8cc5c3608c3b4b03f3ab3693a4

      SHA1

      f85e2745ce0f2f404d97236cd5a751f931e4a3ff

      SHA256

      e3211bb4471cb96576a110f6f81779acaa742d8a6732191bcec307c317dec612

      SHA512

      fa9d89cf9813db7ec65b6c5f266938ebe2653216cbf272e3095727e70a559f93292028f845161021c1ae85da691bbd764b2ea47ee8a19cc88cfdcb188f0deadb

    • memory/852-88-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-91-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-83-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-84-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-99-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-97-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-78-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-79-0x0000000002300000-0x0000000002301000-memory.dmp

      Filesize

      4KB

    • memory/852-80-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-81-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-95-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-93-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/852-90-0x0000000002300000-0x0000000002301000-memory.dmp

      Filesize

      4KB

    • memory/2096-12-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

      Filesize

      4KB

    • memory/2368-85-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/2368-2-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/2368-8-0x0000000000B10000-0x0000000000B11000-memory.dmp

      Filesize

      4KB

    • memory/2368-5-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/2368-7-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/2368-4-0x0000000000400000-0x00000000004E8000-memory.dmp

      Filesize

      928KB

    • memory/2648-82-0x0000000001250000-0x0000000001251000-memory.dmp

      Filesize

      4KB