Analysis

  • max time kernel
    153s
  • max time network
    180s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-12-2022 03:25

General

  • Target

    e5b9281e84cb24c27be96d45f93c01af954cc898fde9cd6450605f9e7ae77d80.exe

  • Size

    611KB

  • MD5

    5c898dd2bc147ffad06ac8362d13614c

  • SHA1

    8f8fc1e81ee69b12a06e256d7f0cdceea54d25dd

  • SHA256

    e5b9281e84cb24c27be96d45f93c01af954cc898fde9cd6450605f9e7ae77d80

  • SHA512

    fcfb8dca28fe47b61f2b201ce160854a3c865aa0f049020a2e741df271772d3e0fd71ebb30fa85d2ad80bc3c0dc0c57183a977f5f4082afc4c240c9d6b06b650

  • SSDEEP

    12288:LTqSnzWHA+m3S0fapaJehb2qTvxpGrLRRWDyw4tw+Unzyn6PPr:/qSn4mCSJS1v7GPUz4tYun6n

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

rattedmyfriend.no-ip.biz:8003

Mutex

DC_MUTEX-CGVK3FE

Attributes
  • gencode

    Z740hakFenqk

  • install

    false

  • offline_keylogger

    true

  • persistence

    false

Signatures

  • Darkcomet

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

  • Modifies firewall policy service 2 TTPs 10 IoCs
  • Executes dropped EXE 2 IoCs
  • UPX packed file 7 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

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

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

  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e5b9281e84cb24c27be96d45f93c01af954cc898fde9cd6450605f9e7ae77d80.exe
    "C:\Users\Admin\AppData\Local\Temp\e5b9281e84cb24c27be96d45f93c01af954cc898fde9cd6450605f9e7ae77d80.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2700
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\applaunch.exe
      C:\Windows\Microsoft.NET\Framework\v2.0.50727\applaunch.exe
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4184
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:776
        • C:\Windows\SysWOW64\reg.exe
          REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
          4⤵
          • Modifies firewall policy service
          • Modifies registry key
          PID:4712
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Windows\Microsoft.NET\Framework\v2.0.50727\applaunch.exe" /t REG_SZ /d "C:\Windows\Microsoft.NET\Framework\v2.0.50727\applaunch.exe:*:Enabled:Windows Messanger" /f
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3132
        • C:\Windows\SysWOW64\reg.exe
          REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Windows\Microsoft.NET\Framework\v2.0.50727\applaunch.exe" /t REG_SZ /d "C:\Windows\Microsoft.NET\Framework\v2.0.50727\applaunch.exe:*:Enabled:Windows Messanger" /f
          4⤵
          • Modifies firewall policy service
          • Modifies registry key
          PID:4492
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2832
        • C:\Windows\SysWOW64\reg.exe
          REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
          4⤵
          • Modifies firewall policy service
          • Modifies registry key
          PID:3604
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Local\Temp\interpals.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\interpals.exe:*:Enabled:Windows Messanger" /f
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2848
        • C:\Windows\SysWOW64\reg.exe
          REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Local\Temp\interpals.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\interpals.exe:*:Enabled:Windows Messanger" /f
          4⤵
          • Modifies firewall policy service
          • Modifies registry key
          PID:4716
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\cwKCo.vbs"
      2⤵
        PID:3192
      • C:\Users\Admin\AppData\Local\Temp\Not crypted server.exe
        "C:\Users\Admin\AppData\Local\Temp\Not crypted server.exe"
        2⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4644
        • C:\Users\Admin\AppData\Local\Temp\TRISTAN SERVER.EXE
          "C:\Users\Admin\AppData\Local\Temp\TRISTAN SERVER.EXE"
          3⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1552

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Modify Existing Service

    1
    T1031

    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\Not crypted server.exe
      Filesize

      419KB

      MD5

      108c042c7a7d40744942dad445481774

      SHA1

      4a03259aa4599c027f12da0d3379216496ef0655

      SHA256

      ee31c8618d31624797b5a6c29e4ee9ffd466239c05bb966cb6ed597ae04a47bb

      SHA512

      c63950e78aed06bc175aff38a12d692ab2cdf6409d17fa08a6f8c5b3b1036d14d1f04c4bf6625d9bdca31dda725e6743f4e1c509d10202822a981a2edae39a5f

    • C:\Users\Admin\AppData\Local\Temp\Not crypted server.exe
      Filesize

      419KB

      MD5

      108c042c7a7d40744942dad445481774

      SHA1

      4a03259aa4599c027f12da0d3379216496ef0655

      SHA256

      ee31c8618d31624797b5a6c29e4ee9ffd466239c05bb966cb6ed597ae04a47bb

      SHA512

      c63950e78aed06bc175aff38a12d692ab2cdf6409d17fa08a6f8c5b3b1036d14d1f04c4bf6625d9bdca31dda725e6743f4e1c509d10202822a981a2edae39a5f

    • C:\Users\Admin\AppData\Local\Temp\TRISTAN SERVER.EXE
      Filesize

      658KB

      MD5

      90050eb20b33f4f0155a98008aee0bf7

      SHA1

      3047729097f0979e87b1403333c384ae4e5c645c

      SHA256

      b10d168ed95926c7da49dc2937e40886d7c2dddd347312f0ec9be2ca8b146f60

      SHA512

      80c7c98b0cd26e405c38ede33426fb47ffe2dd01d810a79860fce7b646d330c179f4a45386070a6fc374e10c23a056b607f39bc64a615cb87a94112cd2a53efe

    • C:\Users\Admin\AppData\Local\Temp\TRISTAN SERVER.EXE
      Filesize

      658KB

      MD5

      90050eb20b33f4f0155a98008aee0bf7

      SHA1

      3047729097f0979e87b1403333c384ae4e5c645c

      SHA256

      b10d168ed95926c7da49dc2937e40886d7c2dddd347312f0ec9be2ca8b146f60

      SHA512

      80c7c98b0cd26e405c38ede33426fb47ffe2dd01d810a79860fce7b646d330c179f4a45386070a6fc374e10c23a056b607f39bc64a615cb87a94112cd2a53efe

    • C:\Users\Admin\AppData\Local\Temp\cwKCo.vbs
      Filesize

      394B

      MD5

      f52500f8ed2a5563b54286f1127195a4

      SHA1

      ce3615fffedcad20d348e7a501f68f61c8da186b

      SHA256

      1e4f06a679a3fac8a4b667bad3a4b3a728cc611f2db9988e85ca6f9acded8104

      SHA512

      e94ee1d6c6d00c873f8f73b4b7acb1b3e95a3278f08851465d32ce560bb29cc158b0e861b57045fb14c25e1d273c3426f976edf3398153517e586b9ea3d8d9ab

    • memory/776-147-0x0000000000000000-mapping.dmp
    • memory/1552-161-0x0000000000000000-mapping.dmp
    • memory/2700-136-0x0000000005280000-0x000000000528A000-memory.dmp
      Filesize

      40KB

    • memory/2700-137-0x0000000005490000-0x00000000054E6000-memory.dmp
      Filesize

      344KB

    • memory/2700-132-0x0000000000780000-0x0000000000822000-memory.dmp
      Filesize

      648KB

    • memory/2700-135-0x0000000005300000-0x0000000005392000-memory.dmp
      Filesize

      584KB

    • memory/2700-134-0x0000000005810000-0x0000000005DB4000-memory.dmp
      Filesize

      5.6MB

    • memory/2700-133-0x00000000051C0000-0x000000000525C000-memory.dmp
      Filesize

      624KB

    • memory/2832-149-0x0000000000000000-mapping.dmp
    • memory/2848-150-0x0000000000000000-mapping.dmp
    • memory/3132-148-0x0000000000000000-mapping.dmp
    • memory/3192-155-0x0000000000000000-mapping.dmp
    • memory/3604-153-0x0000000000000000-mapping.dmp
    • memory/4184-138-0x0000000000000000-mapping.dmp
    • memory/4184-139-0x0000000000400000-0x000000000045D000-memory.dmp
      Filesize

      372KB

    • memory/4184-141-0x0000000000400000-0x000000000045D000-memory.dmp
      Filesize

      372KB

    • memory/4184-142-0x0000000000400000-0x000000000045D000-memory.dmp
      Filesize

      372KB

    • memory/4184-143-0x0000000000400000-0x000000000045D000-memory.dmp
      Filesize

      372KB

    • memory/4492-154-0x0000000000000000-mapping.dmp
    • memory/4644-160-0x0000000000400000-0x000000000055B000-memory.dmp
      Filesize

      1.4MB

    • memory/4644-156-0x0000000000000000-mapping.dmp
    • memory/4712-152-0x0000000000000000-mapping.dmp
    • memory/4716-151-0x0000000000000000-mapping.dmp