Analysis

  • max time kernel
    148s
  • max time network
    168s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-11-2022 23:47

General

  • Target

    55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919.exe

  • Size

    1.6MB

  • MD5

    e7881724e1d97b8004f05d94b99f15aa

  • SHA1

    6e35acbf488e569a2b23d2fac9abd1fdc76a010e

  • SHA256

    55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919

  • SHA512

    418156d64454b6587c21ab3e89b21c39d4f1c702f8530ea93a62694f63253e7487e2c80dd5151159b9e5e16bf204299669a057f9520cb6c39256bc9f0ccdb721

  • SSDEEP

    24576:6tb20pkaCqT5TBWgNQ7ad0AtBp5tncdp5JdL8JDOFrksduEIdN6A:nVg5tQ7ad7J5tKjJdL8ikuNIz5

Malware Config

Extracted

Family

darkcomet

Botnet

Infected

C2

rattingfordays.no-ip.biz:100

Mutex

DC_MUTEX-3K6C68T

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    JDBdm8s85Wwr

  • 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
  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • AutoIT Executable 4 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919.exe
    "C:\Users\Admin\AppData\Local\Temp\55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3156
    • C:\Users\Admin\AppData\Local\Temp\55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919.exe
      "C:\Users\Admin\AppData\Local\Temp\55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919.exe" /AutoIt3ExecuteScript "C:\Users\Admin\AppData\Local\Temp\592396" "C:\Users\Admin\AppData\Local\Temp\55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4152
      • C:\Users\Admin\AppData\Local\Temp\55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919.exe
        "C:\Users\Admin\AppData\Local\Temp\55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919.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:1780
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious use of WriteProcessMemory
          PID:4304
          • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
            "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe" /AutoIt3ExecuteScript "C:\Users\Admin\AppData\Local\Temp\612376" "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of WriteProcessMemory
            PID:3276
            • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
              "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
              6⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious use of SetThreadContext
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:4412
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
                7⤵
                  PID:1512

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\592396

      Filesize

      15KB

      MD5

      7040a16aaf3f6e910659af3636bbe6be

      SHA1

      c4d72a1cf968da2ab274c8d9dc2b13a55223be64

      SHA256

      2b88e2d0b5ee95843e6bba987097ad42dc0c2715ea2adf47289f676795454aee

      SHA512

      199d43e845d7c6d394cae98a133c7fff96b71bdef8437aeb6651d44d6731a71efa2e23991384a9e1a3f66c7a38c9fcd71d7e16e2513e8148d21dd2b2bbc3e479

    • C:\Users\Admin\AppData\Local\Temp\612376

      Filesize

      15KB

      MD5

      7040a16aaf3f6e910659af3636bbe6be

      SHA1

      c4d72a1cf968da2ab274c8d9dc2b13a55223be64

      SHA256

      2b88e2d0b5ee95843e6bba987097ad42dc0c2715ea2adf47289f676795454aee

      SHA512

      199d43e845d7c6d394cae98a133c7fff96b71bdef8437aeb6651d44d6731a71efa2e23991384a9e1a3f66c7a38c9fcd71d7e16e2513e8148d21dd2b2bbc3e479

    • C:\Users\Admin\AppData\Local\Temp\incl1

      Filesize

      12KB

      MD5

      fcaa757b4fc32b9c0c66fe31b0de5376

      SHA1

      472bc2e27449278786857bfe609c868127606c3f

      SHA256

      c413b175de5a10cc23eff47d24279b269b3caf5e45d0f1de1ca645c4381fbac9

      SHA512

      ef6186305b43fc0e42cebaac82f123b83be7077a5dd1004bb9b4f82c95da57230b35a24f787ee8e63ed397e91660cfb40c1338f69c68bc7dbce381b53fe4f61c

    • C:\Users\Admin\AppData\Local\Temp\incl1

      Filesize

      12KB

      MD5

      fcaa757b4fc32b9c0c66fe31b0de5376

      SHA1

      472bc2e27449278786857bfe609c868127606c3f

      SHA256

      c413b175de5a10cc23eff47d24279b269b3caf5e45d0f1de1ca645c4381fbac9

      SHA512

      ef6186305b43fc0e42cebaac82f123b83be7077a5dd1004bb9b4f82c95da57230b35a24f787ee8e63ed397e91660cfb40c1338f69c68bc7dbce381b53fe4f61c

    • C:\Users\Admin\AppData\Local\Temp\incl2

      Filesize

      756KB

      MD5

      7b0aeacc3ec46411d355c090e84a2267

      SHA1

      df573a32519a78edaf37ef2b4d858b031976dc2d

      SHA256

      4b866c78b96f4f82dea55d9864195e8915b666c5e4e070196ac31fbec6510cd1

      SHA512

      8b697dbad9a709193555ab1ede5402f74f788500311d9a319fd164732c5be9b3c7038dc16bb1a6b1c565b60aa86bf2af57585ea065c15cbd2733bb03c758e2a7

    • C:\Users\Admin\AppData\Local\Temp\incl2

      Filesize

      756KB

      MD5

      7b0aeacc3ec46411d355c090e84a2267

      SHA1

      df573a32519a78edaf37ef2b4d858b031976dc2d

      SHA256

      4b866c78b96f4f82dea55d9864195e8915b666c5e4e070196ac31fbec6510cd1

      SHA512

      8b697dbad9a709193555ab1ede5402f74f788500311d9a319fd164732c5be9b3c7038dc16bb1a6b1c565b60aa86bf2af57585ea065c15cbd2733bb03c758e2a7

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

      Filesize

      1.6MB

      MD5

      e7881724e1d97b8004f05d94b99f15aa

      SHA1

      6e35acbf488e569a2b23d2fac9abd1fdc76a010e

      SHA256

      55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919

      SHA512

      418156d64454b6587c21ab3e89b21c39d4f1c702f8530ea93a62694f63253e7487e2c80dd5151159b9e5e16bf204299669a057f9520cb6c39256bc9f0ccdb721

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

      Filesize

      1.6MB

      MD5

      e7881724e1d97b8004f05d94b99f15aa

      SHA1

      6e35acbf488e569a2b23d2fac9abd1fdc76a010e

      SHA256

      55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919

      SHA512

      418156d64454b6587c21ab3e89b21c39d4f1c702f8530ea93a62694f63253e7487e2c80dd5151159b9e5e16bf204299669a057f9520cb6c39256bc9f0ccdb721

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

      Filesize

      1.6MB

      MD5

      e7881724e1d97b8004f05d94b99f15aa

      SHA1

      6e35acbf488e569a2b23d2fac9abd1fdc76a010e

      SHA256

      55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919

      SHA512

      418156d64454b6587c21ab3e89b21c39d4f1c702f8530ea93a62694f63253e7487e2c80dd5151159b9e5e16bf204299669a057f9520cb6c39256bc9f0ccdb721

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

      Filesize

      1.6MB

      MD5

      e7881724e1d97b8004f05d94b99f15aa

      SHA1

      6e35acbf488e569a2b23d2fac9abd1fdc76a010e

      SHA256

      55fbc8f96b54789e032d9d79bb766592e4ccc54c8e7eacbd16142f7f9d529919

      SHA512

      418156d64454b6587c21ab3e89b21c39d4f1c702f8530ea93a62694f63253e7487e2c80dd5151159b9e5e16bf204299669a057f9520cb6c39256bc9f0ccdb721

    • memory/1780-144-0x0000000000F00000-0x0000000000FCA000-memory.dmp

      Filesize

      808KB

    • memory/1780-137-0x0000000000F00000-0x0000000000FCA000-memory.dmp

      Filesize

      808KB

    • memory/1780-136-0x0000000000000000-mapping.dmp

    • memory/1780-138-0x0000000000F00000-0x0000000000FCA000-memory.dmp

      Filesize

      808KB

    • memory/1780-140-0x0000000000F00000-0x0000000000FCA000-memory.dmp

      Filesize

      808KB

    • memory/1780-139-0x0000000000F00000-0x0000000000FCA000-memory.dmp

      Filesize

      808KB

    • memory/3276-145-0x0000000000000000-mapping.dmp

    • memory/4152-132-0x0000000000000000-mapping.dmp

    • memory/4304-141-0x0000000000000000-mapping.dmp

    • memory/4412-150-0x0000000000000000-mapping.dmp

    • memory/4412-151-0x0000000001000000-0x00000000010CA000-memory.dmp

      Filesize

      808KB

    • memory/4412-153-0x0000000001000000-0x00000000010CA000-memory.dmp

      Filesize

      808KB

    • memory/4412-154-0x0000000001000000-0x00000000010CA000-memory.dmp

      Filesize

      808KB

    • memory/4412-155-0x0000000001000000-0x00000000010CA000-memory.dmp

      Filesize

      808KB

    • memory/4412-156-0x0000000001000000-0x00000000010CA000-memory.dmp

      Filesize

      808KB