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Analysis

  • max time kernel
    147s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250314-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/03/2025, 13:55

General

  • Target

    JaffaCakes118_865a76dfc19b433afb42e655c9001592.exe

  • Size

    412KB

  • MD5

    865a76dfc19b433afb42e655c9001592

  • SHA1

    a8e90d5c7202b45aa5ecd9a9e09d95c1cad331c0

  • SHA256

    10a199ce0118059a4f2bf5fbd5a7680096a419429913802b00a3305ddc22e290

  • SHA512

    484d1e554e4984829c213a66e9aca81bb47933b247ace3a0a6daef5e66b9ba3dc57ce60a193b691d5b051c16d954b2a7950ebecfd1543bf086b577b4944333df

  • SSDEEP

    12288:e0Siiu2cOMayaZerXXmhFXS7VS+vcXKmg3kL:k3gV6eih+TvIKmgU

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

62.195.250.128 :20

127.0.0.1:20

Mutex

DC_MUTEX-Y9XUFHU

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    tDz+N/NQx2CU

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    MicroUpdate

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 security service 2 TTPs 2 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Drops file in Drivers directory 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.

  • Executes dropped EXE 2 IoCs
  • Windows security modification 2 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Network Service Discovery 1 TTPs 1 IoCs

    Attempt to gather information on host's network.

  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 6 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.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_865a76dfc19b433afb42e655c9001592.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_865a76dfc19b433afb42e655c9001592.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops file in Drivers directory
    • 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:5032
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat" "
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4840
      • 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:2780
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat" "
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5324
      • 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:5932
    • C:\Users\Admin\AppData\Local\Temp\MINECRAFT.EXE
      "C:\Users\Admin\AppData\Local\Temp\MINECRAFT.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5612
      • C:\Program Files\Java\jre-1.8\bin\javaw.exe
        "C:\Program Files\Java\jre-1.8\bin\javaw.exe" -Xms512m -Xmx1024m -jar "C:\Users\Admin\AppData\Local\Temp\MINECRAFT.EXE"
        3⤵
        • Suspicious use of SetWindowsHookEx
        PID:2952
    • C:\ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe
      "C:\ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies security service
      • Windows security bypass
      • Executes dropped EXE
      • Windows security modification
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1492
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Modifies security service
        • Windows security bypass
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:5792
  • C:\Windows\System32\GameBarPresenceWriter.exe
    "C:\Windows\System32\GameBarPresenceWriter.exe" -ServerName:Windows.Gaming.GameBar.Internal.PresenceWriterServer
    1⤵
    • Network Service Discovery
    PID:1728
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Suspicious use of SetWindowsHookEx
    PID:3376

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe

    Filesize

    412KB

    MD5

    865a76dfc19b433afb42e655c9001592

    SHA1

    a8e90d5c7202b45aa5ecd9a9e09d95c1cad331c0

    SHA256

    10a199ce0118059a4f2bf5fbd5a7680096a419429913802b00a3305ddc22e290

    SHA512

    484d1e554e4984829c213a66e9aca81bb47933b247ace3a0a6daef5e66b9ba3dc57ce60a193b691d5b051c16d954b2a7950ebecfd1543bf086b577b4944333df

  • C:\Users\Admin\AppData\Local\Temp\MINECRAFT.EXE

    Filesize

    263KB

    MD5

    0f1931e26c21219db1c90e90037f11f6

    SHA1

    74b65f7fb7fa197d413ba5bc45cf10304deb4ecc

    SHA256

    f4d54e35b857b5dfbca6fefcff5ab5599ce30b62eef7deded6594c5be93d25c3

    SHA512

    0c6a90034e5852915af61ccc091568cb636f583d4c4b5cca8bfc3f7f86bbf6a79f16c324d723c1d3968d7996071bb85a79cd6fde682bb4bfeedfd770b7b8e817

  • C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat

    Filesize

    50B

    MD5

    b774ae3fb1da087e1f83b4f7b2060e5a

    SHA1

    97eb9be49ac3af9c851c9e1e84e32bfd53e325a8

    SHA256

    adaf4a84b41e410b02e261cfd0fe7739d98647eab73c3badd32ac6e39f26351b

    SHA512

    f75d0f95f7306d26a12b414bfe37b97fbd37546cb3c6e403def7077329ddffb4b45d5c5f0ba0e7bb6d72851d2d691b0a85267beead42f7cbf2e8c3d45a3b4701

  • memory/1492-97-0x0000000000400000-0x000000000050B000-memory.dmp

    Filesize

    1.0MB

  • memory/1492-93-0x0000000000400000-0x000000000050B000-memory.dmp

    Filesize

    1.0MB

  • memory/2952-166-0x000001882BAB0000-0x000001882BAB1000-memory.dmp

    Filesize

    4KB

  • memory/2952-212-0x000001882BAB0000-0x000001882BAB1000-memory.dmp

    Filesize

    4KB

  • memory/2952-24-0x000001882BAD0000-0x000001882BD40000-memory.dmp

    Filesize

    2.4MB

  • memory/2952-229-0x000001882BAD0000-0x000001882BD40000-memory.dmp

    Filesize

    2.4MB

  • memory/2952-228-0x000001882BAB0000-0x000001882BAB1000-memory.dmp

    Filesize

    4KB

  • memory/2952-217-0x000001882BAB0000-0x000001882BAB1000-memory.dmp

    Filesize

    4KB

  • memory/2952-33-0x000001882BAB0000-0x000001882BAB1000-memory.dmp

    Filesize

    4KB

  • memory/2952-101-0x000001882BAB0000-0x000001882BAB1000-memory.dmp

    Filesize

    4KB

  • memory/2952-142-0x000001882BAB0000-0x000001882BAB1000-memory.dmp

    Filesize

    4KB

  • memory/2952-162-0x000001882BAB0000-0x000001882BAB1000-memory.dmp

    Filesize

    4KB

  • memory/2952-199-0x000001882BAB0000-0x000001882BAB1000-memory.dmp

    Filesize

    4KB

  • memory/2952-181-0x000001882BAB0000-0x000001882BAB1000-memory.dmp

    Filesize

    4KB

  • memory/5032-0-0x0000000000400000-0x000000000050B000-memory.dmp

    Filesize

    1.0MB

  • memory/5032-1-0x00000000009D0000-0x00000000009D1000-memory.dmp

    Filesize

    4KB

  • memory/5032-92-0x0000000000400000-0x000000000050B000-memory.dmp

    Filesize

    1.0MB

  • memory/5612-21-0x0000000000400000-0x0000000000439000-memory.dmp

    Filesize

    228KB

  • memory/5792-95-0x0000000000400000-0x000000000050B000-memory.dmp

    Filesize

    1.0MB