Analysis

  • max time kernel
    193s
  • max time network
    207s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-11-2022 23:24

General

  • Target

    5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe

  • Size

    1.6MB

  • MD5

    0620050df2e5a15c53b9035407c4cfbf

  • SHA1

    5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

  • SHA256

    5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

  • SHA512

    1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

  • SSDEEP

    24576:WF14CROX4GLhHexsQ8XqlAzpGNQUlFTH0dxXc/2hAqT9MI8SqVb8JNPTEJaE53:WF1pR4LhusCAF2d8dikAu9MzgzE4C

Malware Config

Extracted

Family

darkcomet

Botnet

bndbt

C2

imouttahere.no-ip.biz:1605

Mutex

DC_MUTEX-PPBR4G6

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    xPKZmVuPN7gy

  • install

    true

  • offline_keylogger

    true

  • password

    aerohigh

  • persistence

    false

  • 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
  • Executes dropped EXE 3 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 26 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe
    "C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe
      C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2628
      • C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe
        "C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe"
        3⤵
        • Modifies WinLogon for persistence
        • Checks computer location settings
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2172
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2548
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe" +s +h
            5⤵
            • Sets file to hidden
            • Views/modifies file attributes
            PID:2676
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2536
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
            5⤵
            • Sets file to hidden
            • Views/modifies file attributes
            PID:2560
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2588
          • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
            C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:4572
            • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
              "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
              6⤵
              • Executes dropped EXE
              PID:4540
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4540 -s 80
                7⤵
                • Program crash
                PID:1800
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4540 -ip 4540
    1⤵
      PID:3528

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      1.6MB

      MD5

      0620050df2e5a15c53b9035407c4cfbf

      SHA1

      5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

      SHA256

      5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

      SHA512

      1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      1.6MB

      MD5

      0620050df2e5a15c53b9035407c4cfbf

      SHA1

      5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

      SHA256

      5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

      SHA512

      1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      1.6MB

      MD5

      0620050df2e5a15c53b9035407c4cfbf

      SHA1

      5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

      SHA256

      5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

      SHA512

      1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      1.6MB

      MD5

      0620050df2e5a15c53b9035407c4cfbf

      SHA1

      5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

      SHA256

      5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

      SHA512

      1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

    • memory/2036-132-0x0000000000BA0000-0x0000000000C9E000-memory.dmp
      Filesize

      1016KB

    • memory/2036-133-0x00000000055F0000-0x000000000568C000-memory.dmp
      Filesize

      624KB

    • memory/2172-164-0x0000000000400000-0x00000000004B2000-memory.dmp
      Filesize

      712KB

    • memory/2172-140-0x0000000000000000-mapping.dmp
    • memory/2172-141-0x0000000000400000-0x00000000004B2000-memory.dmp
      Filesize

      712KB

    • memory/2172-142-0x0000000000400000-0x00000000004B2000-memory.dmp
      Filesize

      712KB

    • memory/2172-143-0x0000000000400000-0x00000000004B2000-memory.dmp
      Filesize

      712KB

    • memory/2172-145-0x0000000000400000-0x00000000004B2000-memory.dmp
      Filesize

      712KB

    • memory/2536-147-0x0000000000000000-mapping.dmp
    • memory/2548-146-0x0000000000000000-mapping.dmp
    • memory/2560-152-0x0000000000000000-mapping.dmp
    • memory/2588-148-0x0000000000000000-mapping.dmp
    • memory/2628-144-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/2628-137-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/2628-135-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/2628-134-0x0000000000000000-mapping.dmp
    • memory/2676-150-0x0000000000000000-mapping.dmp
    • memory/4540-160-0x0000000000000000-mapping.dmp
    • memory/4572-153-0x0000000000000000-mapping.dmp
    • memory/4572-157-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/4572-163-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB