Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240730-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-07-2024 20:21

General

  • Target

    79e6cc28e0963624948eb30a0d186e18_JaffaCakes118.exe

  • Size

    367KB

  • MD5

    79e6cc28e0963624948eb30a0d186e18

  • SHA1

    6f2ea39a768a353fbc274bb23b08f017cd063e6f

  • SHA256

    7ee15a666207cba86b1693f32ff79b40b0e45a3fca3ef47b46cb61a9c41d9f9d

  • SHA512

    fbb11d97af83fd50137bce2f0a322a558f4cd02bc2d58650bc65a295a1fe17cde7d8df65279aa75dc2eb02bc4d3bacfaff5742440c0ec882d1ed919fbc2e7fec

  • SSDEEP

    6144:Uo6mAeSeYD5An7Xu8UjsTPH1g3E6mvyiw7/+nx9b7r+oBGFQ04CQskrFLofmE:uChYWnK1EPH18E/vyN+DXIQ7JLofmE

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

116.37.6.196:1604

Mutex

DC_MUTEX-MJ67NPZ

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    xvCNv79xVljd

  • 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 firewall policy service 3 TTPs 3 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.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • UPX packed file 11 IoCs

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

  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 3 IoCs
  • 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 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 59 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\79e6cc28e0963624948eb30a0d186e18_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\79e6cc28e0963624948eb30a0d186e18_JaffaCakes118.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:920
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\79e6cc28e0963624948eb30a0d186e18_JaffaCakes118.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3824
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\79e6cc28e0963624948eb30a0d186e18_JaffaCakes118.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:3480
    • 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:3744
      • 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:3380
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:5052
    • C:\Windows\MSDCSC\msdcsc.exe
      "C:\Windows\MSDCSC\msdcsc.exe"
      2⤵
      • 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 behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:4556
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
          PID:2720
        • C:\Windows\explorer.exe
          "C:\Windows\explorer.exe"
          3⤵
            PID:3316
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            3⤵
            • System Location Discovery: System Language Discovery
            PID:4460

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Windows\MSDCSC\msdcsc.exe

        Filesize

        367KB

        MD5

        79e6cc28e0963624948eb30a0d186e18

        SHA1

        6f2ea39a768a353fbc274bb23b08f017cd063e6f

        SHA256

        7ee15a666207cba86b1693f32ff79b40b0e45a3fca3ef47b46cb61a9c41d9f9d

        SHA512

        fbb11d97af83fd50137bce2f0a322a558f4cd02bc2d58650bc65a295a1fe17cde7d8df65279aa75dc2eb02bc4d3bacfaff5742440c0ec882d1ed919fbc2e7fec

      • memory/920-17-0x0000000000400000-0x00000000005A9C68-memory.dmp

        Filesize

        1.7MB

      • memory/920-1-0x0000000002380000-0x0000000002381000-memory.dmp

        Filesize

        4KB

      • memory/920-0-0x0000000000400000-0x00000000005A9C68-memory.dmp

        Filesize

        1.7MB

      • memory/4460-19-0x0000000000850000-0x0000000000851000-memory.dmp

        Filesize

        4KB

      • memory/4556-18-0x0000000000400000-0x00000000005A9C68-memory.dmp

        Filesize

        1.7MB

      • memory/4556-21-0x0000000000400000-0x00000000005A9C68-memory.dmp

        Filesize

        1.7MB

      • memory/4556-23-0x0000000000400000-0x00000000005A9C68-memory.dmp

        Filesize

        1.7MB

      • memory/4556-25-0x0000000000400000-0x00000000005A9C68-memory.dmp

        Filesize

        1.7MB

      • memory/4556-27-0x0000000000400000-0x00000000005A9C68-memory.dmp

        Filesize

        1.7MB

      • memory/4556-29-0x0000000000400000-0x00000000005A9C68-memory.dmp

        Filesize

        1.7MB

      • memory/4556-31-0x0000000000400000-0x00000000005A9C68-memory.dmp

        Filesize

        1.7MB

      • memory/4556-33-0x0000000000400000-0x00000000005A9C68-memory.dmp

        Filesize

        1.7MB

      • memory/5052-5-0x0000000000A60000-0x0000000000A61000-memory.dmp

        Filesize

        4KB