Analysis

  • max time kernel
    162s
  • max time network
    170s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220722-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220722-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-07-2022 11:41

General

  • Target

    7925fb4943617c8bf2740c0d4030243a70d5461d6069ed136c7a0360c9545744.exe

  • Size

    440KB

  • MD5

    a56c8f7c8cc94966093d7ea2b3241f12

  • SHA1

    e12bdd5b96295d73e2bd14b63d5be1dffe485796

  • SHA256

    7925fb4943617c8bf2740c0d4030243a70d5461d6069ed136c7a0360c9545744

  • SHA512

    5f343bd670d633f403d561312de638a4eac63bb937b86557c39b56f89a86ac94382319a36ac9bff5e9a4401e2f91950f4129e945e51668cd8937ec4a7c8849a6

Malware Config

Extracted

Family

darkcomet

Botnet

garry

C2

212.83.162.240:4449

Mutex

DC_MUTEX-HVQYYV2

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    qP9qMy51lYCf

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    SQLBrowser

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 1 IoCs
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • UPX packed file 4 IoCs

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

  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7925fb4943617c8bf2740c0d4030243a70d5461d6069ed136c7a0360c9545744.exe
    "C:\Users\Admin\AppData\Local\Temp\7925fb4943617c8bf2740c0d4030243a70d5461d6069ed136c7a0360c9545744.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4108
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4108 -s 636
      2⤵
      • Program crash
      PID:1816
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4108 -s 988
      2⤵
      • Program crash
      PID:4496
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4108 -s 988
      2⤵
      • Program crash
      PID:2040
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4108 -s 988
      2⤵
      • Program crash
      PID:1472
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4108 -s 1064
      2⤵
      • Program crash
      PID:4556
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4108 -s 1180
      2⤵
      • Program crash
      PID:2260
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4108 -s 1200
      2⤵
      • Program crash
      PID:2380
    • 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:3524
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1736
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
        PID:4100
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        2⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4916
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 620
          3⤵
          • Program crash
          PID:1092
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          3⤵
            PID:1824
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 912
            3⤵
            • Program crash
            PID:4032
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 920
            3⤵
            • Program crash
            PID:4732
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 976
            3⤵
            • Program crash
            PID:1644
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 956
            3⤵
            • Program crash
            PID:108
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 1008
            3⤵
            • Program crash
            PID:4368
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 1012
            3⤵
            • Program crash
            PID:4848
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 964
            3⤵
            • Program crash
            PID:1624
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4108 -ip 4108
        1⤵
          PID:4976
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 4108 -ip 4108
          1⤵
            PID:4196
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 4108 -ip 4108
            1⤵
              PID:2524
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 4108 -ip 4108
              1⤵
                PID:4892
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4108 -ip 4108
                1⤵
                  PID:5004
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4108 -ip 4108
                  1⤵
                    PID:3660
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 4108 -ip 4108
                    1⤵
                      PID:4264
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4916 -ip 4916
                      1⤵
                        PID:3624
                      • C:\Windows\SysWOW64\WerFault.exe
                        C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4916 -ip 4916
                        1⤵
                          PID:4632
                        • C:\Windows\SysWOW64\WerFault.exe
                          C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4916 -ip 4916
                          1⤵
                            PID:4700
                          • C:\Windows\SysWOW64\WerFault.exe
                            C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4916 -ip 4916
                            1⤵
                              PID:1504
                            • C:\Windows\SysWOW64\WerFault.exe
                              C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 4916 -ip 4916
                              1⤵
                                PID:204
                              • C:\Windows\SysWOW64\WerFault.exe
                                C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 4916 -ip 4916
                                1⤵
                                  PID:4292
                                • C:\Windows\SysWOW64\WerFault.exe
                                  C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4916 -ip 4916
                                  1⤵
                                    PID:1952
                                  • C:\Windows\SysWOW64\WerFault.exe
                                    C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4916 -ip 4916
                                    1⤵
                                      PID:3752

                                    Network

                                    MITRE ATT&CK Matrix ATT&CK v6

                                    Persistence

                                    Winlogon Helper DLL

                                    1
                                    T1004

                                    Hidden Files and Directories

                                    2
                                    T1158

                                    Registry Run Keys / Startup Folder

                                    1
                                    T1060

                                    Defense Evasion

                                    Modify Registry

                                    2
                                    T1112

                                    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\Documents\MSDCSC\msdcsc.exe
                                      Filesize

                                      440KB

                                      MD5

                                      a56c8f7c8cc94966093d7ea2b3241f12

                                      SHA1

                                      e12bdd5b96295d73e2bd14b63d5be1dffe485796

                                      SHA256

                                      7925fb4943617c8bf2740c0d4030243a70d5461d6069ed136c7a0360c9545744

                                      SHA512

                                      5f343bd670d633f403d561312de638a4eac63bb937b86557c39b56f89a86ac94382319a36ac9bff5e9a4401e2f91950f4129e945e51668cd8937ec4a7c8849a6

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

                                      440KB

                                      MD5

                                      a56c8f7c8cc94966093d7ea2b3241f12

                                      SHA1

                                      e12bdd5b96295d73e2bd14b63d5be1dffe485796

                                      SHA256

                                      7925fb4943617c8bf2740c0d4030243a70d5461d6069ed136c7a0360c9545744

                                      SHA512

                                      5f343bd670d633f403d561312de638a4eac63bb937b86557c39b56f89a86ac94382319a36ac9bff5e9a4401e2f91950f4129e945e51668cd8937ec4a7c8849a6

                                    • memory/1736-141-0x0000000000000000-mapping.dmp
                                    • memory/1824-144-0x0000000000000000-mapping.dmp
                                    • memory/3524-136-0x0000000000000000-mapping.dmp
                                    • memory/4100-137-0x0000000000000000-mapping.dmp
                                    • memory/4108-135-0x0000000000400000-0x0000000000B9C000-memory.dmp
                                      Filesize

                                      7.6MB

                                    • memory/4108-132-0x0000000000E6B000-0x0000000000EAB000-memory.dmp
                                      Filesize

                                      256KB

                                    • memory/4108-134-0x0000000000E6B000-0x0000000000EAB000-memory.dmp
                                      Filesize

                                      256KB

                                    • memory/4108-133-0x0000000000400000-0x0000000000B9C000-memory.dmp
                                      Filesize

                                      7.6MB

                                    • memory/4916-138-0x0000000000000000-mapping.dmp
                                    • memory/4916-142-0x0000000000C4B000-0x0000000000C8B000-memory.dmp
                                      Filesize

                                      256KB

                                    • memory/4916-143-0x0000000000400000-0x0000000000B9C000-memory.dmp
                                      Filesize

                                      7.6MB

                                    • memory/4916-145-0x0000000000C4B000-0x0000000000C8B000-memory.dmp
                                      Filesize

                                      256KB

                                    • memory/4916-146-0x0000000000400000-0x0000000000B9C000-memory.dmp
                                      Filesize

                                      7.6MB