Analysis

  • max time kernel
    136s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-11-2024 16:54

General

  • Target

    f461b17cf839f10db53155f207682533d99a056ee3a883ff7e0e6f5bc77f87c6.exe

  • Size

    5.4MB

  • MD5

    616fd2b3429b816fc7ebc62d103cc995

  • SHA1

    5a202f24dda9c7b9407b1bc41c27a84c29ea964f

  • SHA256

    f461b17cf839f10db53155f207682533d99a056ee3a883ff7e0e6f5bc77f87c6

  • SHA512

    a0c1a065d6d6b18127c92597baccbcd4fd2136eee4462182899a928c163a2adad065ceabd6a12bf369a8e5ceafb318c29782100ebfc3e63e014602b7253d1bc2

  • SSDEEP

    98304:9uv8pxJvkLXr8+VOOrjL6eRhzvBG40st9Rl0E4dV0Q89XbrnH:9dY4+QOrjpRhzBL0K9H05dCQwH

Malware Config

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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • VMProtect packed file 10 IoCs

    Detects executables packed with VMProtect commercial packer.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 3 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 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 7 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f461b17cf839f10db53155f207682533d99a056ee3a883ff7e0e6f5bc77f87c6.exe
    "C:\Users\Admin\AppData\Local\Temp\f461b17cf839f10db53155f207682533d99a056ee3a883ff7e0e6f5bc77f87c6.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4240
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\f461b17cf839f10db53155f207682533d99a056ee3a883ff7e0e6f5bc77f87c6.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2856
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\f461b17cf839f10db53155f207682533d99a056ee3a883ff7e0e6f5bc77f87c6.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:4764
    • 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:4476
      • 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:5008
    • C:\Windows\SysWOW64\Runtime Broker.exe
      "C:\Windows\system32\Runtime Broker.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4976
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • System Location Discovery: System Language Discovery
        PID:4248

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\Runtime Broker.exe

    Filesize

    5.4MB

    MD5

    616fd2b3429b816fc7ebc62d103cc995

    SHA1

    5a202f24dda9c7b9407b1bc41c27a84c29ea964f

    SHA256

    f461b17cf839f10db53155f207682533d99a056ee3a883ff7e0e6f5bc77f87c6

    SHA512

    a0c1a065d6d6b18127c92597baccbcd4fd2136eee4462182899a928c163a2adad065ceabd6a12bf369a8e5ceafb318c29782100ebfc3e63e014602b7253d1bc2

  • memory/4240-3-0x0000000002AB0000-0x0000000002AB1000-memory.dmp

    Filesize

    4KB

  • memory/4240-8-0x0000000002B20000-0x0000000002B21000-memory.dmp

    Filesize

    4KB

  • memory/4240-4-0x0000000002AE0000-0x0000000002AE1000-memory.dmp

    Filesize

    4KB

  • memory/4240-38-0x00000000004A4000-0x00000000007D9000-memory.dmp

    Filesize

    3.2MB

  • memory/4240-7-0x0000000002B10000-0x0000000002B11000-memory.dmp

    Filesize

    4KB

  • memory/4240-6-0x0000000002B00000-0x0000000002B01000-memory.dmp

    Filesize

    4KB

  • memory/4240-2-0x0000000002AA0000-0x0000000002AA1000-memory.dmp

    Filesize

    4KB

  • memory/4240-9-0x0000000002B30000-0x0000000002B31000-memory.dmp

    Filesize

    4KB

  • memory/4240-5-0x0000000002AF0000-0x0000000002AF1000-memory.dmp

    Filesize

    4KB

  • memory/4240-10-0x0000000000400000-0x0000000000D3E000-memory.dmp

    Filesize

    9.2MB

  • memory/4240-15-0x0000000000400000-0x0000000000D3E000-memory.dmp

    Filesize

    9.2MB

  • memory/4240-1-0x0000000000400000-0x0000000000D3E000-memory.dmp

    Filesize

    9.2MB

  • memory/4240-39-0x0000000000400000-0x0000000000D3E000-memory.dmp

    Filesize

    9.2MB

  • memory/4240-0-0x00000000004A4000-0x00000000007D9000-memory.dmp

    Filesize

    3.2MB

  • memory/4248-40-0x0000000000400000-0x0000000000D3E000-memory.dmp

    Filesize

    9.2MB

  • memory/4976-36-0x0000000000400000-0x0000000000D3E000-memory.dmp

    Filesize

    9.2MB

  • memory/4976-31-0x0000000002C30000-0x0000000002C31000-memory.dmp

    Filesize

    4KB

  • memory/4976-30-0x0000000002C20000-0x0000000002C21000-memory.dmp

    Filesize

    4KB

  • memory/4976-29-0x0000000002C10000-0x0000000002C11000-memory.dmp

    Filesize

    4KB

  • memory/4976-28-0x0000000002C00000-0x0000000002C01000-memory.dmp

    Filesize

    4KB

  • memory/4976-27-0x0000000002BD0000-0x0000000002BD1000-memory.dmp

    Filesize

    4KB

  • memory/4976-26-0x0000000002BC0000-0x0000000002BC1000-memory.dmp

    Filesize

    4KB

  • memory/4976-37-0x0000000000400000-0x0000000000D3E000-memory.dmp

    Filesize

    9.2MB

  • memory/4976-32-0x0000000002C40000-0x0000000002C41000-memory.dmp

    Filesize

    4KB

  • memory/4976-33-0x0000000002C50000-0x0000000002C51000-memory.dmp

    Filesize

    4KB

  • memory/4976-34-0x0000000000400000-0x0000000000D3E000-memory.dmp

    Filesize

    9.2MB

  • memory/4976-41-0x0000000000400000-0x0000000000D3E000-memory.dmp

    Filesize

    9.2MB