Analysis

  • max time kernel
    62s
  • max time network
    64s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    28-02-2021 10:19

Errors

Reason
Machine shutdown

General

  • Target

    1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe

  • Size

    594KB

  • MD5

    6815e92e3b69abb83257aff53ccf411b

  • SHA1

    dd588b78d08d8eea3f553fe1cec692ac2340111b

  • SHA256

    1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

  • SHA512

    1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Malware Config

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs
  • Disables Task Manager via registry modification
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 4 IoCs
  • Modifies WinLogon to allow AutoLogon 2 TTPs 1 IoCs

    Enables rebooting of the machine without requiring login credentials.

  • UPX packed file 3 IoCs

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

  • 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 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 3 IoCs
  • Modifies data under HKEY_USERS 15 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 53 IoCs
  • Suspicious use of AdjustPrivilegeToken 60 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 59 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe
    "C:\Users\Admin\AppData\Local\Temp\1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1048
    • C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
      "C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1400
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
          PID:3384
        • C:\Users\Admin\Documents\skypes.exe
          "C:\Users\Admin\Documents\skypes.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2136
          • C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
            "C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe"
            4⤵
            • Executes dropped EXE
            PID:640
          • C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
            "C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe"
            4⤵
            • Executes dropped EXE
            • Adds Run key to start application
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:3884
            • C:\Windows\SysWOW64\notepad.exe
              notepad
              5⤵
                PID:4032
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 2136 -s 1076
              4⤵
              • Program crash
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:3924
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 2136 -s 1088
              4⤵
              • Suspicious use of NtCreateProcessExOtherParentProcess
              • Program crash
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2348
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1048 -s 1088
          2⤵
          • Program crash
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2720
      • C:\Windows\system32\LogonUI.exe
        "LogonUI.exe" /flags:0x0 /state0:0xa3ad4855 /state1:0x41c64e6d
        1⤵
        • Modifies WinLogon to allow AutoLogon
        • Modifies data under HKEY_USERS
        • Suspicious use of SetWindowsHookEx
        PID:1524

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Winlogon Helper DLL

      2
      T1004

      Registry Run Keys / Startup Folder

      1
      T1060

      Defense Evasion

      Modify Registry

      3
      T1112

      Discovery

      Query Registry

      1
      T1012

      System Information Discovery

      2
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
        MD5

        6815e92e3b69abb83257aff53ccf411b

        SHA1

        dd588b78d08d8eea3f553fe1cec692ac2340111b

        SHA256

        1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

        SHA512

        1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

      • C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
        MD5

        6815e92e3b69abb83257aff53ccf411b

        SHA1

        dd588b78d08d8eea3f553fe1cec692ac2340111b

        SHA256

        1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

        SHA512

        1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

      • C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
        MD5

        6815e92e3b69abb83257aff53ccf411b

        SHA1

        dd588b78d08d8eea3f553fe1cec692ac2340111b

        SHA256

        1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

        SHA512

        1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

      • C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
        MD5

        6815e92e3b69abb83257aff53ccf411b

        SHA1

        dd588b78d08d8eea3f553fe1cec692ac2340111b

        SHA256

        1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

        SHA512

        1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

      • C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
        MD5

        6815e92e3b69abb83257aff53ccf411b

        SHA1

        dd588b78d08d8eea3f553fe1cec692ac2340111b

        SHA256

        1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

        SHA512

        1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

      • C:\Users\Admin\Documents\skypes.exe
        MD5

        6815e92e3b69abb83257aff53ccf411b

        SHA1

        dd588b78d08d8eea3f553fe1cec692ac2340111b

        SHA256

        1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

        SHA512

        1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

      • C:\Users\Admin\Documents\skypes.exe
        MD5

        6815e92e3b69abb83257aff53ccf411b

        SHA1

        dd588b78d08d8eea3f553fe1cec692ac2340111b

        SHA256

        1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

        SHA512

        1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

      • memory/1048-2-0x0000000002650000-0x0000000002651000-memory.dmp
        Filesize

        4KB

      • memory/1400-10-0x0000000000400000-0x00000000004B7000-memory.dmp
        Filesize

        732KB

      • memory/1400-11-0x0000000002D90000-0x0000000002D91000-memory.dmp
        Filesize

        4KB

      • memory/1400-4-0x00000000004B57C0-mapping.dmp
      • memory/1400-3-0x0000000000400000-0x00000000004B7000-memory.dmp
        Filesize

        732KB

      • memory/2136-13-0x0000000000000000-mapping.dmp
      • memory/2136-16-0x0000000002F60000-0x0000000002F61000-memory.dmp
        Filesize

        4KB

      • memory/2348-30-0x0000000004D90000-0x0000000004D91000-memory.dmp
        Filesize

        4KB

      • memory/2720-7-0x0000000004D80000-0x0000000004D81000-memory.dmp
        Filesize

        4KB

      • memory/3384-8-0x0000000000000000-mapping.dmp
      • memory/3384-9-0x0000000001020000-0x0000000001021000-memory.dmp
        Filesize

        4KB

      • memory/3884-19-0x00000000004B57C0-mapping.dmp
      • memory/3884-28-0x0000000001430000-0x0000000001431000-memory.dmp
        Filesize

        4KB

      • memory/3884-27-0x0000000000400000-0x00000000004B7000-memory.dmp
        Filesize

        732KB

      • memory/3924-24-0x00000000046D0000-0x00000000046D1000-memory.dmp
        Filesize

        4KB

      • memory/3924-25-0x00000000046D0000-0x00000000046D1000-memory.dmp
        Filesize

        4KB

      • memory/4032-23-0x0000000000920000-0x0000000000921000-memory.dmp
        Filesize

        4KB

      • memory/4032-22-0x0000000000000000-mapping.dmp