Analysis

  • max time kernel
    174s
  • max time network
    198s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/10/2022, 06:04

General

  • Target

    1c3ed473829c36e6f402cb68bd926a32ed485a05cc11e996cb168db637da4838.exe

  • Size

    899KB

  • MD5

    6da56cea43476a4f55d54df747649200

  • SHA1

    e8f8474fc51e67bbd9eeee53675f9cee2063f2ae

  • SHA256

    1c3ed473829c36e6f402cb68bd926a32ed485a05cc11e996cb168db637da4838

  • SHA512

    ed1e6f874d613488c8f542b03f906bea8bf59c0353680cb9278e462b9ce858cf4dd86340843a32428e2e7523b8bc0930c4b1dfb0edd4485cb1aa60596a2a599d

  • SSDEEP

    24576:VTAmBpVKHu0Mu9Xo20VGLVP5TKIe5GiyseoV:VTAmKZVUGkrV

Malware Config

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1c3ed473829c36e6f402cb68bd926a32ed485a05cc11e996cb168db637da4838.exe
    "C:\Users\Admin\AppData\Local\Temp\1c3ed473829c36e6f402cb68bd926a32ed485a05cc11e996cb168db637da4838.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4924
    • C:\Users\Admin\AppData\Local\Temp\KKKKKKKKK.EXE
      "C:\Users\Admin\AppData\Local\Temp\KKKKKKKKK.EXE"
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1428
      • C:\Users\Admin\AppData\Roaming\msdssvc\csrss.exe
        "C:\Users\Admin\AppData\Roaming\msdssvc\csrss.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2280
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 5 > NUL&del "C:\Users\Admin\AppData\Local\Temp\KKKKKKKKK.EXE"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:100
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 5
          4⤵
          • Runs ping.exe
          PID:4584

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

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

          Filesize

          648KB

          MD5

          f37b0bbe83404c4c0f7c4a35090b0a57

          SHA1

          bc7ec454a13939dd37a9e0edf4e38d9202dc2e41

          SHA256

          39552b0f89440188afb2afda77b2a9a0c26588d97cd2e70192f69106a2fccbe2

          SHA512

          e8f73957c7c8c11cdcd81be5867b998018f15f38c97494d31d0ed14c86a25e33fe711a87602f9fee3a9224c7e651ee477f705d21f3e36fd9152a09dfa972b12c

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

          Filesize

          648KB

          MD5

          f37b0bbe83404c4c0f7c4a35090b0a57

          SHA1

          bc7ec454a13939dd37a9e0edf4e38d9202dc2e41

          SHA256

          39552b0f89440188afb2afda77b2a9a0c26588d97cd2e70192f69106a2fccbe2

          SHA512

          e8f73957c7c8c11cdcd81be5867b998018f15f38c97494d31d0ed14c86a25e33fe711a87602f9fee3a9224c7e651ee477f705d21f3e36fd9152a09dfa972b12c

        • C:\Users\Admin\AppData\Roaming\msdssvc\csrss.exe

          Filesize

          648KB

          MD5

          f37b0bbe83404c4c0f7c4a35090b0a57

          SHA1

          bc7ec454a13939dd37a9e0edf4e38d9202dc2e41

          SHA256

          39552b0f89440188afb2afda77b2a9a0c26588d97cd2e70192f69106a2fccbe2

          SHA512

          e8f73957c7c8c11cdcd81be5867b998018f15f38c97494d31d0ed14c86a25e33fe711a87602f9fee3a9224c7e651ee477f705d21f3e36fd9152a09dfa972b12c

        • C:\Users\Admin\AppData\Roaming\msdssvc\csrss.exe

          Filesize

          648KB

          MD5

          f37b0bbe83404c4c0f7c4a35090b0a57

          SHA1

          bc7ec454a13939dd37a9e0edf4e38d9202dc2e41

          SHA256

          39552b0f89440188afb2afda77b2a9a0c26588d97cd2e70192f69106a2fccbe2

          SHA512

          e8f73957c7c8c11cdcd81be5867b998018f15f38c97494d31d0ed14c86a25e33fe711a87602f9fee3a9224c7e651ee477f705d21f3e36fd9152a09dfa972b12c