Analysis

  • max time kernel
    151s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    16-05-2021 04:12

General

  • Target

    08738f3c54f1746671a177e6b62f888168b1c6a6cc8bc33465ba7bd561e43d5d.exe

  • Size

    759KB

  • MD5

    0975db5051a34591560f66e6f267bcda

  • SHA1

    1aa2b239eac5cbd19950b2a4afc8d41833d3f3e1

  • SHA256

    08738f3c54f1746671a177e6b62f888168b1c6a6cc8bc33465ba7bd561e43d5d

  • SHA512

    44246fdb3b70202218625a3503df8d0a954014edd6f2ca78ffe9636c9b7d20ab0cddb9576fb0b6c0ffc94f025566cb8d14285427dfec906daf1d823f0ceede15

Malware Config

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Checks processor information in registry 2 TTPs 8 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\08738f3c54f1746671a177e6b62f888168b1c6a6cc8bc33465ba7bd561e43d5d.exe
    "C:\Users\Admin\AppData\Local\Temp\08738f3c54f1746671a177e6b62f888168b1c6a6cc8bc33465ba7bd561e43d5d.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:484
    • C:\Users\Admin\AppData\Local\Temp\08738f3c54f1746671a177e6b62f888168b1c6a6cc8bc33465ba7bd561e43d5d.exe
      "C:\Users\Admin\AppData\Local\Temp\08738f3c54f1746671a177e6b62f888168b1c6a6cc8bc33465ba7bd561e43d5d.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Checks BIOS information in registry
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1948
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • Adds Run key to start application
        PID:1720
      • C:\Windows\SysWOW64\explorer.exe
        "C:\Windows\SysWOW64\explorer.exe"
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1740
        • C:\Windows\SysWOW64\explorer.exe
          "C:\Windows\SysWOW64\explorer.exe"
          4⤵
          • Checks BIOS information in registry
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1412

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Windupdt\winupdate.exe
    MD5

    0975db5051a34591560f66e6f267bcda

    SHA1

    1aa2b239eac5cbd19950b2a4afc8d41833d3f3e1

    SHA256

    08738f3c54f1746671a177e6b62f888168b1c6a6cc8bc33465ba7bd561e43d5d

    SHA512

    44246fdb3b70202218625a3503df8d0a954014edd6f2ca78ffe9636c9b7d20ab0cddb9576fb0b6c0ffc94f025566cb8d14285427dfec906daf1d823f0ceede15

  • memory/1412-76-0x00000000001B0000-0x00000000001B1000-memory.dmp
    Filesize

    4KB

  • memory/1412-75-0x0000000013140000-0x00000000131F6000-memory.dmp
    Filesize

    728KB

  • memory/1412-73-0x00000000131D08B4-mapping.dmp
  • memory/1720-70-0x00000000001F0000-0x00000000001F1000-memory.dmp
    Filesize

    4KB

  • memory/1720-63-0x0000000000000000-mapping.dmp
  • memory/1740-66-0x000000000040676E-mapping.dmp
  • memory/1740-65-0x0000000000400000-0x00000000004C2000-memory.dmp
    Filesize

    776KB

  • memory/1740-71-0x0000000000400000-0x00000000004C2000-memory.dmp
    Filesize

    776KB

  • memory/1948-67-0x0000000013140000-0x00000000131F6000-memory.dmp
    Filesize

    728KB

  • memory/1948-60-0x0000000013140000-0x00000000131F6000-memory.dmp
    Filesize

    728KB

  • memory/1948-68-0x0000000000260000-0x0000000000261000-memory.dmp
    Filesize

    4KB

  • memory/1948-62-0x0000000075FE1000-0x0000000075FE3000-memory.dmp
    Filesize

    8KB

  • memory/1948-61-0x00000000131D08B4-mapping.dmp