Analysis

  • max time kernel
    150s
  • max time network
    143s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    06-11-2020 11:46

General

  • Target

    58a2fa4a15e85f2cba62f30a84220cda8dffc43193acb8aa5cd83c4d40d28453.exe

  • Size

    752KB

  • MD5

    72cb9f5693c7dff79fecd8cdb3880ea8

  • SHA1

    9b7ac2f7dd26ae17c0048f630286f13689f195bb

  • SHA256

    58a2fa4a15e85f2cba62f30a84220cda8dffc43193acb8aa5cd83c4d40d28453

  • SHA512

    06b040c5766c6d4639d77130ca4653dc7083d9af47d25d7a0975958d1412d9606ba8cc2b20b67594355b60c1f9d2ce1a8b8adbc323f65276c30e7e56b03786f5

Malware Config

Extracted

Family

darkcomet

Botnet

2020NOV5

C2

sandyclark255.hopto.org:1605

Mutex

DC_MUTEX-XRQ89VC

Attributes
  • InstallPath

    skypew.exe

  • gencode

    pZP6alYpcpSq

  • install

    true

  • offline_keylogger

    true

  • password

    hhhhhh

  • persistence

    true

  • reg_key

    skype

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Disables Task Manager via registry modification
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 3 IoCs
  • 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 2 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 34 IoCs
  • Suspicious use of AdjustPrivilegeToken 54 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\58a2fa4a15e85f2cba62f30a84220cda8dffc43193acb8aa5cd83c4d40d28453.exe
    "C:\Users\Admin\AppData\Local\Temp\58a2fa4a15e85f2cba62f30a84220cda8dffc43193acb8aa5cd83c4d40d28453.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3988
    • C:\Users\Admin\AppData\Local\Temp\sduiHi6p255fGT7C\svehoste.exe
      "C:\Users\Admin\AppData\Local\Temp\sduiHi6p255fGT7C\svehoste.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:1288
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
          PID:3280
        • C:\Users\Admin\Documents\skypew.exe
          "C:\Users\Admin\Documents\skypew.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1008
          • C:\Users\Admin\AppData\Local\Temp\sduiHi6p255fGT7C\svehoste.exe
            "C:\Users\Admin\AppData\Local\Temp\sduiHi6p255fGT7C\svehoste.exe"
            4⤵
            • Executes dropped EXE
            • Adds Run key to start application
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1632
            • C:\Windows\SysWOW64\notepad.exe
              notepad
              5⤵
                PID:2696
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 1008 -s 1068
              4⤵
              • Program crash
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2704
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3988 -s 1076
          2⤵
          • Program crash
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3920

      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

      1
      T1012

      System Information Discovery

      2
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\sduiHi6p255fGT7C\svehoste.exe
        MD5

        72cb9f5693c7dff79fecd8cdb3880ea8

        SHA1

        9b7ac2f7dd26ae17c0048f630286f13689f195bb

        SHA256

        58a2fa4a15e85f2cba62f30a84220cda8dffc43193acb8aa5cd83c4d40d28453

        SHA512

        06b040c5766c6d4639d77130ca4653dc7083d9af47d25d7a0975958d1412d9606ba8cc2b20b67594355b60c1f9d2ce1a8b8adbc323f65276c30e7e56b03786f5

      • C:\Users\Admin\AppData\Local\Temp\sduiHi6p255fGT7C\svehoste.exe
        MD5

        72cb9f5693c7dff79fecd8cdb3880ea8

        SHA1

        9b7ac2f7dd26ae17c0048f630286f13689f195bb

        SHA256

        58a2fa4a15e85f2cba62f30a84220cda8dffc43193acb8aa5cd83c4d40d28453

        SHA512

        06b040c5766c6d4639d77130ca4653dc7083d9af47d25d7a0975958d1412d9606ba8cc2b20b67594355b60c1f9d2ce1a8b8adbc323f65276c30e7e56b03786f5

      • C:\Users\Admin\AppData\Local\Temp\sduiHi6p255fGT7C\svehoste.exe
        MD5

        72cb9f5693c7dff79fecd8cdb3880ea8

        SHA1

        9b7ac2f7dd26ae17c0048f630286f13689f195bb

        SHA256

        58a2fa4a15e85f2cba62f30a84220cda8dffc43193acb8aa5cd83c4d40d28453

        SHA512

        06b040c5766c6d4639d77130ca4653dc7083d9af47d25d7a0975958d1412d9606ba8cc2b20b67594355b60c1f9d2ce1a8b8adbc323f65276c30e7e56b03786f5

      • C:\Users\Admin\AppData\Local\Temp\sduiHi6p255fGT7C\svehoste.exe
        MD5

        72cb9f5693c7dff79fecd8cdb3880ea8

        SHA1

        9b7ac2f7dd26ae17c0048f630286f13689f195bb

        SHA256

        58a2fa4a15e85f2cba62f30a84220cda8dffc43193acb8aa5cd83c4d40d28453

        SHA512

        06b040c5766c6d4639d77130ca4653dc7083d9af47d25d7a0975958d1412d9606ba8cc2b20b67594355b60c1f9d2ce1a8b8adbc323f65276c30e7e56b03786f5

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

        72cb9f5693c7dff79fecd8cdb3880ea8

        SHA1

        9b7ac2f7dd26ae17c0048f630286f13689f195bb

        SHA256

        58a2fa4a15e85f2cba62f30a84220cda8dffc43193acb8aa5cd83c4d40d28453

        SHA512

        06b040c5766c6d4639d77130ca4653dc7083d9af47d25d7a0975958d1412d9606ba8cc2b20b67594355b60c1f9d2ce1a8b8adbc323f65276c30e7e56b03786f5

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

        72cb9f5693c7dff79fecd8cdb3880ea8

        SHA1

        9b7ac2f7dd26ae17c0048f630286f13689f195bb

        SHA256

        58a2fa4a15e85f2cba62f30a84220cda8dffc43193acb8aa5cd83c4d40d28453

        SHA512

        06b040c5766c6d4639d77130ca4653dc7083d9af47d25d7a0975958d1412d9606ba8cc2b20b67594355b60c1f9d2ce1a8b8adbc323f65276c30e7e56b03786f5

      • memory/1008-25-0x0000000000000000-mapping.dmp
      • memory/1008-29-0x0000000000000000-mapping.dmp
      • memory/1008-33-0x0000000000000000-mapping.dmp
      • memory/1008-32-0x0000000000000000-mapping.dmp
      • memory/1008-10-0x0000000000000000-mapping.dmp
      • memory/1008-30-0x0000000000000000-mapping.dmp
      • memory/1008-31-0x0000000000000000-mapping.dmp
      • memory/1008-22-0x0000000000000000-mapping.dmp
      • memory/1008-23-0x0000000000000000-mapping.dmp
      • memory/1008-27-0x0000000000000000-mapping.dmp
      • memory/1008-24-0x0000000000000000-mapping.dmp
      • memory/1008-26-0x0000000000000000-mapping.dmp
      • memory/1288-1-0x000000000048F888-mapping.dmp
      • memory/1288-0-0x0000000000400000-0x00000000004C2000-memory.dmp
        Filesize

        776KB

      • memory/1288-4-0x0000000000400000-0x00000000004C2000-memory.dmp
        Filesize

        776KB

      • memory/1632-14-0x000000000048F888-mapping.dmp
      • memory/1632-16-0x0000000000400000-0x00000000004C2000-memory.dmp
        Filesize

        776KB

      • memory/2696-20-0x0000000000000000-mapping.dmp
      • memory/2696-19-0x0000000000EC0000-0x0000000000EC1000-memory.dmp
        Filesize

        4KB

      • memory/2696-18-0x0000000000000000-mapping.dmp
      • memory/2704-21-0x0000000004770000-0x0000000004771000-memory.dmp
        Filesize

        4KB

      • memory/2704-28-0x0000000005230000-0x0000000005231000-memory.dmp
        Filesize

        4KB

      • memory/3280-7-0x0000000000C10000-0x0000000000C11000-memory.dmp
        Filesize

        4KB

      • memory/3280-6-0x0000000000000000-mapping.dmp
      • memory/3280-8-0x0000000000000000-mapping.dmp
      • memory/3920-5-0x0000000004D00000-0x0000000004D01000-memory.dmp
        Filesize

        4KB

      • memory/3920-9-0x00000000058F0000-0x00000000058F1000-memory.dmp
        Filesize

        4KB