Analysis

  • max time kernel
    167s
  • max time network
    186s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-11-2022 18:34

General

  • Target

    8e8464b9cb182bff66d6b120e1afcd572a69841b024e8e036eeeefad438cd0f6.exe

  • Size

    333KB

  • MD5

    43b6dfffd47b4d4f3d23cdd3cce7e730

  • SHA1

    1de316fc167f9e504658859f8cf4cd4d34140310

  • SHA256

    8e8464b9cb182bff66d6b120e1afcd572a69841b024e8e036eeeefad438cd0f6

  • SHA512

    532111c665a45bb9885a0c89d2e31a9779833d2913bcf1f0f2b27c0541db03e2032b573849339e16681bb873c8267a3a46c13e125f4b0e2bb416fd6923bfa10b

  • SSDEEP

    6144:KpNuoZB8CK7pJId0xyQkRqm9hd5ManyCVfKcwuzqCFRwmvYaKY:yA7pqd0xyXfvMcfuBCDwmf

Malware Config

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Executes dropped EXE 2 IoCs
  • UPX packed file 7 IoCs

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

  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in System32 directory 6 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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
  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8e8464b9cb182bff66d6b120e1afcd572a69841b024e8e036eeeefad438cd0f6.exe
    "C:\Users\Admin\AppData\Local\Temp\8e8464b9cb182bff66d6b120e1afcd572a69841b024e8e036eeeefad438cd0f6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1524
    • C:\Users\Admin\AppData\Local\Temp\8e8464b9cb182bff66d6b120e1afcd572a69841b024e8e036eeeefad438cd0f6.exe
      C:\Users\Admin\AppData\Local\Temp\8e8464b9cb182bff66d6b120e1afcd572a69841b024e8e036eeeefad438cd0f6.exe
      2⤵
      • Modifies WinLogon for persistence
      • Checks BIOS information in registry
      • Checks computer location settings
      • Adds Run key to start application
      • Drops file in System32 directory
      • Checks processor information in registry
      • Enumerates system info in registry
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1416
      • C:\Windows\SysWOW64\explorer.exe
        "C:\Windows\SysWOW64\explorer.exe"
        3⤵
          PID:1564
        • C:\Windows\SysWOW64\Windupdt\winupdate.exe
          "C:\Windows\system32\Windupdt\winupdate.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2948
          • C:\Windows\SysWOW64\Windupdt\winupdate.exe
            C:\Windows\SysWOW64\Windupdt\winupdate.exe
            4⤵
            • Modifies WinLogon for persistence
            • Executes dropped EXE
            • Checks BIOS information in registry
            • Adds Run key to start application
            • Drops file in System32 directory
            • Suspicious use of SetThreadContext
            • Checks processor information in registry
            • Enumerates system info in registry
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4352
            • C:\Windows\SysWOW64\explorer.exe
              "C:\Windows\SysWOW64\explorer.exe"
              5⤵
              • Suspicious use of SetWindowsHookEx
              PID:4260

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Windows\SysWOW64\Windupdt\winupdate.exe

      Filesize

      333KB

      MD5

      43b6dfffd47b4d4f3d23cdd3cce7e730

      SHA1

      1de316fc167f9e504658859f8cf4cd4d34140310

      SHA256

      8e8464b9cb182bff66d6b120e1afcd572a69841b024e8e036eeeefad438cd0f6

      SHA512

      532111c665a45bb9885a0c89d2e31a9779833d2913bcf1f0f2b27c0541db03e2032b573849339e16681bb873c8267a3a46c13e125f4b0e2bb416fd6923bfa10b

    • C:\Windows\SysWOW64\Windupdt\winupdate.exe

      Filesize

      333KB

      MD5

      43b6dfffd47b4d4f3d23cdd3cce7e730

      SHA1

      1de316fc167f9e504658859f8cf4cd4d34140310

      SHA256

      8e8464b9cb182bff66d6b120e1afcd572a69841b024e8e036eeeefad438cd0f6

      SHA512

      532111c665a45bb9885a0c89d2e31a9779833d2913bcf1f0f2b27c0541db03e2032b573849339e16681bb873c8267a3a46c13e125f4b0e2bb416fd6923bfa10b

    • C:\Windows\SysWOW64\Windupdt\winupdate.exe

      Filesize

      333KB

      MD5

      43b6dfffd47b4d4f3d23cdd3cce7e730

      SHA1

      1de316fc167f9e504658859f8cf4cd4d34140310

      SHA256

      8e8464b9cb182bff66d6b120e1afcd572a69841b024e8e036eeeefad438cd0f6

      SHA512

      532111c665a45bb9885a0c89d2e31a9779833d2913bcf1f0f2b27c0541db03e2032b573849339e16681bb873c8267a3a46c13e125f4b0e2bb416fd6923bfa10b

    • memory/1416-150-0x0000000000400000-0x00000000004B5000-memory.dmp

      Filesize

      724KB

    • memory/1416-134-0x0000000000000000-mapping.dmp

    • memory/1416-139-0x0000000000400000-0x00000000004B5000-memory.dmp

      Filesize

      724KB

    • memory/1416-136-0x0000000000400000-0x00000000004B5000-memory.dmp

      Filesize

      724KB

    • memory/1416-137-0x0000000000400000-0x00000000004B5000-memory.dmp

      Filesize

      724KB

    • memory/1416-138-0x0000000000400000-0x00000000004B5000-memory.dmp

      Filesize

      724KB

    • memory/1416-135-0x0000000000400000-0x00000000004B5000-memory.dmp

      Filesize

      724KB

    • memory/1564-140-0x0000000000000000-mapping.dmp

    • memory/2948-141-0x0000000000000000-mapping.dmp

    • memory/4260-161-0x0000000000400000-0x0000000000419000-memory.dmp

      Filesize

      100KB

    • memory/4260-153-0x0000000000000000-mapping.dmp

    • memory/4260-154-0x0000000000400000-0x0000000000419000-memory.dmp

      Filesize

      100KB

    • memory/4260-162-0x0000000000400000-0x0000000000419000-memory.dmp

      Filesize

      100KB

    • memory/4260-156-0x0000000000400000-0x0000000000419000-memory.dmp

      Filesize

      100KB

    • memory/4260-160-0x0000000000400000-0x0000000000419000-memory.dmp

      Filesize

      100KB

    • memory/4352-146-0x0000000000000000-mapping.dmp

    • memory/4352-157-0x0000000000400000-0x00000000004B5000-memory.dmp

      Filesize

      724KB