Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-07-2023 14:53

General

  • Target

    easy_Malicious_2da05edc14df9557fc474515f29ca7f4a5c2fcb2de085c443ab37cace93194cf.exe

  • Size

    1.4MB

  • MD5

    49f3321b14dd9dcb9108b1c6d139bc7b

  • SHA1

    35876b7c9ff2a3c609792c9d49a9641dc181bfec

  • SHA256

    933aba01ef4f1c57b7f6b82a59dcdada8f8689eb711e5a6c165f6b3d6ee3aa68

  • SHA512

    f922d959e0f6e746a4c360ccd406784d5fe5115f16b5cb14256e5557440d5636709d1a2bbc88127cf604c100207558028a08a0ff8ccb0cac42452d195c044abb

  • SSDEEP

    24576:nZ1xuVVjfFoynPaVBUR8f+kN10EBbZ1xuVVjfFoynPaVBUR8f+kN10EBsgugEnoI:ZQDgok302QDgok30hgEnoSE5I

Malware Config

Extracted

Family

darkcomet

Botnet

Sazan

C2

ratcidavut.duckdns.org:1604

Mutex

DC_MUTEX-EGAAD3Q

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    QmqknQ6ovQPD

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 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 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\easy_Malicious_2da05edc14df9557fc474515f29ca7f4a5c2fcb2de085c443ab37cace93194cf.exe
    "C:\Users\Admin\AppData\Local\Temp\easy_Malicious_2da05edc14df9557fc474515f29ca7f4a5c2fcb2de085c443ab37cace93194cf.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in System32 directory
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1492
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\easy_Malicious_2da05edc14df9557fc474515f29ca7f4a5c2fcb2de085c443ab37cace93194cf.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4240
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\easy_Malicious_2da05edc14df9557fc474515f29ca7f4a5c2fcb2de085c443ab37cace93194cf.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:4416
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1532
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:396
    • C:\Users\Admin\AppData\Local\Temp\DAVUTHITTER V2.987.EXE
      "C:\Users\Admin\AppData\Local\Temp\DAVUTHITTER V2.987.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3716
    • C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
      "C:\Windows\system32\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies firewall policy service
      • Modifies security service
      • Windows security bypass
      • Executes dropped EXE
      • Windows security modification
      • Adds Run key to start application
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:2724
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
          PID:2460

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Modify Existing Service

    2
    T1031

    Hidden Files and Directories

    2
    T1158

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    7
    T1112

    Disabling Security Tools

    2
    T1089

    Hidden Files and Directories

    2
    T1158

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    2
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\DAVUTHITTER V2.987.EXE
      Filesize

      657KB

      MD5

      34960f869aa933675a70c0c7c17addfe

      SHA1

      b01ec370b3571d70a2d111f35d5514cc7a18d422

      SHA256

      9343339fadfe0f62d6fd46c6131ed9fdf01978d817192984e69a8bbecfb406d2

      SHA512

      5993de154bc0f5db448a243a3d0ec7929e968823b24ae256226e2d8e82f1d50d62977e5a21a2b775cd422416d8656ed0dec103b850a58633b12bec074a4f58d5

    • C:\Users\Admin\AppData\Local\Temp\DAVUTHITTER V2.987.EXE
      Filesize

      657KB

      MD5

      34960f869aa933675a70c0c7c17addfe

      SHA1

      b01ec370b3571d70a2d111f35d5514cc7a18d422

      SHA256

      9343339fadfe0f62d6fd46c6131ed9fdf01978d817192984e69a8bbecfb406d2

      SHA512

      5993de154bc0f5db448a243a3d0ec7929e968823b24ae256226e2d8e82f1d50d62977e5a21a2b775cd422416d8656ed0dec103b850a58633b12bec074a4f58d5

    • C:\Users\Admin\AppData\Local\Temp\DAVUTHITTER V2.987.EXE
      Filesize

      657KB

      MD5

      34960f869aa933675a70c0c7c17addfe

      SHA1

      b01ec370b3571d70a2d111f35d5514cc7a18d422

      SHA256

      9343339fadfe0f62d6fd46c6131ed9fdf01978d817192984e69a8bbecfb406d2

      SHA512

      5993de154bc0f5db448a243a3d0ec7929e968823b24ae256226e2d8e82f1d50d62977e5a21a2b775cd422416d8656ed0dec103b850a58633b12bec074a4f58d5

    • C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
      Filesize

      1.4MB

      MD5

      49f3321b14dd9dcb9108b1c6d139bc7b

      SHA1

      35876b7c9ff2a3c609792c9d49a9641dc181bfec

      SHA256

      933aba01ef4f1c57b7f6b82a59dcdada8f8689eb711e5a6c165f6b3d6ee3aa68

      SHA512

      f922d959e0f6e746a4c360ccd406784d5fe5115f16b5cb14256e5557440d5636709d1a2bbc88127cf604c100207558028a08a0ff8ccb0cac42452d195c044abb

    • C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
      Filesize

      1.4MB

      MD5

      49f3321b14dd9dcb9108b1c6d139bc7b

      SHA1

      35876b7c9ff2a3c609792c9d49a9641dc181bfec

      SHA256

      933aba01ef4f1c57b7f6b82a59dcdada8f8689eb711e5a6c165f6b3d6ee3aa68

      SHA512

      f922d959e0f6e746a4c360ccd406784d5fe5115f16b5cb14256e5557440d5636709d1a2bbc88127cf604c100207558028a08a0ff8ccb0cac42452d195c044abb

    • C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
      Filesize

      1.4MB

      MD5

      49f3321b14dd9dcb9108b1c6d139bc7b

      SHA1

      35876b7c9ff2a3c609792c9d49a9641dc181bfec

      SHA256

      933aba01ef4f1c57b7f6b82a59dcdada8f8689eb711e5a6c165f6b3d6ee3aa68

      SHA512

      f922d959e0f6e746a4c360ccd406784d5fe5115f16b5cb14256e5557440d5636709d1a2bbc88127cf604c100207558028a08a0ff8ccb0cac42452d195c044abb

    • memory/1492-137-0x00000000021F0000-0x00000000021F1000-memory.dmp
      Filesize

      4KB

    • memory/1492-208-0x0000000000400000-0x0000000000567000-memory.dmp
      Filesize

      1.4MB

    • memory/2460-206-0x0000000000F30000-0x0000000000F31000-memory.dmp
      Filesize

      4KB

    • memory/2724-207-0x0000000000720000-0x0000000000721000-memory.dmp
      Filesize

      4KB

    • memory/2724-210-0x0000000000400000-0x0000000000567000-memory.dmp
      Filesize

      1.4MB

    • memory/2724-214-0x0000000000400000-0x0000000000567000-memory.dmp
      Filesize

      1.4MB

    • memory/3716-195-0x0000000000670000-0x0000000000671000-memory.dmp
      Filesize

      4KB

    • memory/3716-209-0x0000000000400000-0x00000000004B1000-memory.dmp
      Filesize

      708KB