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Analysis

  • max time kernel
    120s
  • max time network
    16s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    16/12/2024, 10:39

General

  • Target

    996beea9299ded8bca31425c26e3cc07930852c4a0b73ca362ff9e2200d651acN.exe

  • Size

    658KB

  • MD5

    7e32a97cd6071306602c84c223bee650

  • SHA1

    3d8533bf5fdbd5830382d3e331215d70c7798946

  • SHA256

    996beea9299ded8bca31425c26e3cc07930852c4a0b73ca362ff9e2200d651ac

  • SHA512

    01871935591a371394e2b394b2638aac51bf6248200aa97c28dcc04b22ac6d107b1f097a6a6412b3b7b21bce29b1c62a839c481bf94e0f9732178e683afc40a7

  • SSDEEP

    12288:+9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hI:KZ1xuVVjfFoynPaVBUR8f+kN10EB6

Malware Config

Extracted

Family

darkcomet

Botnet

Guest1

C2

adobens.hopto.org:1604

Mutex

DC_MUTEX-GDVHDWW

Attributes
  • InstallPath

    MSDCS\msdcs12.exe

  • gencode

    HAlbHiVRqz20

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    msdcsa

Signatures

  • Darkcomet

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

  • Darkcomet family
  • 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.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Drops file in System32 directory 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\996beea9299ded8bca31425c26e3cc07930852c4a0b73ca362ff9e2200d651acN.exe
    "C:\Users\Admin\AppData\Local\Temp\996beea9299ded8bca31425c26e3cc07930852c4a0b73ca362ff9e2200d651acN.exe"
    1⤵
    • 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:2464
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\996beea9299ded8bca31425c26e3cc07930852c4a0b73ca362ff9e2200d651acN.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2396
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\996beea9299ded8bca31425c26e3cc07930852c4a0b73ca362ff9e2200d651acN.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:2968
    • 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:2428
      • 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:2104
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2476
    • C:\Windows\SysWOW64\MSDCS\msdcs12.exe
      "C:\Windows\system32\MSDCS\msdcs12.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2848
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3004
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2308

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\MSDCS\msdcs12.exe

    Filesize

    658KB

    MD5

    7e32a97cd6071306602c84c223bee650

    SHA1

    3d8533bf5fdbd5830382d3e331215d70c7798946

    SHA256

    996beea9299ded8bca31425c26e3cc07930852c4a0b73ca362ff9e2200d651ac

    SHA512

    01871935591a371394e2b394b2638aac51bf6248200aa97c28dcc04b22ac6d107b1f097a6a6412b3b7b21bce29b1c62a839c481bf94e0f9732178e683afc40a7

  • memory/2308-69-0x00000000003F0000-0x00000000003F1000-memory.dmp

    Filesize

    4KB

  • memory/2464-0-0x0000000000270000-0x0000000000271000-memory.dmp

    Filesize

    4KB

  • memory/2464-70-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2476-19-0x0000000000190000-0x0000000000191000-memory.dmp

    Filesize

    4KB

  • memory/2476-4-0x0000000000080000-0x0000000000081000-memory.dmp

    Filesize

    4KB

  • memory/2848-30-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/3004-29-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB