Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    24-06-2020 15:06

General

  • Target

    c2c82ee2700333d677bee2937f99b1e5657f339e23c27b5b7d2a397b672fffd9.exe

  • Size

    932KB

  • MD5

    1dc80685c258916d30f9bf2365d76ff5

  • SHA1

    bc0111105913d61308b5164833d31574d0391543

  • SHA256

    c2c82ee2700333d677bee2937f99b1e5657f339e23c27b5b7d2a397b672fffd9

  • SHA512

    7bf344038fc679919f30f93070c666c5409d76f81b8a79cf6aeda9d356ad7b9b570de0e994b4dd20096e3b3869b63ad496361f08bbd24eaa3eea6580aa965ba2

Malware Config

Extracted

Family

darkcomet

Botnet

Test Server

C2

127.0.0.1:1604

Mutex

DC_MUTEX-4XKPULH

Attributes
  • gencode

    LBSgYfRa7QDe

  • install

    false

  • offline_keylogger

    true

  • persistence

    false

Signatures

  • Darkcomet

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

  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Executes dropped EXE 6 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 2 IoCs
  • Modifies registry key 1 TTPs 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 26 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c2c82ee2700333d677bee2937f99b1e5657f339e23c27b5b7d2a397b672fffd9.exe
    "C:\Users\Admin\AppData\Local\Temp\c2c82ee2700333d677bee2937f99b1e5657f339e23c27b5b7d2a397b672fffd9.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2880
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /V chrome.exe /T REG_SZ /D C:\Users\Admin\AppData\Local\Temp\chrome.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3884
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /V chrome.exe /T REG_SZ /D C:\Users\Admin\AppData\Local\Temp\chrome.exe
        3⤵
        • Adds Run key to start application
        • Modifies registry key
        PID:3932
    • C:\Users\Admin\AppData\Local\Temp\taskmgr.exe
      C:\Users\Admin\AppData\Local\Temp\taskmgr.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:3016
      • C:\Users\Admin\AppData\Local\Temp\STEWART LOGO.EXE
        "C:\Users\Admin\AppData\Local\Temp\STEWART LOGO.EXE"
        3⤵
        • Modifies system executable filetype association
        • Executes dropped EXE
        • Drops file in Program Files directory
        • Drops file in Windows directory
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:760
        • C:\Users\Admin\AppData\Local\Temp\3582-490\STEWART LOGO.EXE
          "C:\Users\Admin\AppData\Local\Temp\3582-490\STEWART LOGO.EXE"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Modifies registry class
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1016
          • C:\Windows\svchost.com
            "C:\Windows\svchost.com" "C:\Windows\System32\cmd.exe" /C REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /V facebook.exe /T REG_SZ /D C:\Users\Admin\AppData\Local\Temp\facebook.exe
            5⤵
            • Executes dropped EXE
            • Drops file in Program Files directory
            • Drops file in Windows directory
            • Suspicious use of WriteProcessMemory
            PID:652
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\System32\cmd.exe /C REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /V facebook.exe /T REG_SZ /D C:\Users\Admin\AppData\Local\Temp\facebook.exe
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:860
              • C:\Windows\SysWOW64\reg.exe
                REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /V facebook.exe /T REG_SZ /D C:\Users\Admin\AppData\Local\Temp\facebook.exe
                7⤵
                • Adds Run key to start application
                • Modifies registry key
                PID:1340
          • C:\Users\Admin\AppData\Local\Temp\notepad.exe
            C:\Users\Admin\AppData\Local\Temp\notepad.exe
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:912
          • C:\Windows\svchost.com
            "C:\Windows\svchost.com" "C:\Windows\System32\cmd.exe" /C choice /C Y /N /D Y /T 3 & Del C:\Users\Admin\AppData\Local\Temp\3582-490\STEWART LOGO.EXE
            5⤵
            • Executes dropped EXE
            • Drops file in Windows directory
            • Suspicious use of WriteProcessMemory
            PID:2336
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\System32\cmd.exe /C choice /C Y /N /D Y /T 3 & Del C:\Users\Admin\AppData\Local\Temp\3582-490\STEWART LOGO.EXE
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:3680
              • C:\Windows\SysWOW64\choice.exe
                choice /C Y /N /D Y /T 3
                7⤵
                  PID:2692

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Change Default File Association

    1
    T1042

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    3
    T1112

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    1
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROBR~1.EXE
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADOBEC~1.EXE
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADelRCP.exe
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroCEF\RdrCEF.exe
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroRd32.exe
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\Browser\WCCHRO~1\WCCHRO~1.EXE
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\Eula.exe
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\FULLTR~1.EXE
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\LOGTRA~1.EXE
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\READER~1.EXE
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\WOW_HE~1.EXE
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\arh.exe
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\32BITM~1.EXE
    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\64BITM~1.EXE
    • C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\ADOBEA~1.EXE
    • C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\AdobeARM.exe
    • C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\armsvc.exe
    • C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jaureg.exe
    • C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jucheck.exe
    • C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jusched.exe
    • C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE
    • C:\PROGRA~2\Google\Chrome\APPLIC~1\830410~1.106\CHROME~1.EXE
    • C:\PROGRA~2\Google\Chrome\APPLIC~1\830410~1.106\ELEVAT~1.EXE
    • C:\PROGRA~2\Google\Chrome\APPLIC~1\830410~1.106\INSTAL~1\chrmstp.exe
    • C:\PROGRA~2\Google\Chrome\APPLIC~1\830410~1.106\INSTAL~1\setup.exe
    • C:\PROGRA~2\Google\Chrome\APPLIC~1\830410~1.106\NOTIFI~1.EXE
    • C:\PROGRA~2\Google\Chrome\APPLIC~1\CHROME~1.EXE
    • C:\PROGRA~2\Google\Chrome\APPLIC~1\chrome.exe
    • C:\PROGRA~2\Google\Temp\GUM3D84.tmp\GOFB2B~1.EXE
    • C:\PROGRA~2\Google\Update\1335~1.452\GO664E~1.EXE
    • C:\PROGRA~2\Google\Update\1335~1.452\GOBD5D~1.EXE
    • C:\PROGRA~2\Google\Update\1335~1.452\GOF5E2~1.EXE
    • C:\PROGRA~2\Google\Update\1335~1.452\GOFB2B~1.EXE
    • C:\PROGRA~2\Google\Update\1335~1.452\GOOGLE~1.EXE
    • C:\PROGRA~2\Google\Update\1335~1.452\GOOGLE~2.EXE
    • C:\PROGRA~2\Google\Update\1335~1.452\GOOGLE~3.EXE
    • C:\PROGRA~2\Google\Update\1335~1.452\GOOGLE~4.EXE
    • C:\PROGRA~2\Google\Update\DISABL~1.EXE
    • C:\PROGRA~2\MOZILL~1\MAINTE~1.EXE
    • C:\PROGRA~2\MOZILL~1\UNINST~1.EXE
    • C:\PROGRA~3\Adobe\Setup\{AC76B~1\setup.exe
    • C:\PROGRA~3\MICROS~1\CLICKT~1\{9AC08~1\INTEGR~1.EXE
    • C:\PROGRA~3\PACKAG~1\{CA675~1\VCREDI~1.EXE
    • C:\PROGRA~3\PACKAG~1\{EF6B0~1\VCREDI~1.EXE
    • C:\PROGRA~3\PACKAG~1\{F4220~1\VC_RED~1.EXE
    • C:\Users\Admin\AppData\Local\MICROS~1\OneDrive\181510~1.001\FILECO~1.EXE
    • C:\Users\Admin\AppData\Local\MICROS~1\OneDrive\181510~1.001\FILESY~1.EXE
    • C:\Users\Admin\AppData\Local\MICROS~1\OneDrive\ONEDRI~1.EXE
    • C:\Users\Admin\AppData\Local\MICROS~1\OneDrive\OneDrive.exe
    • C:\Users\Admin\AppData\Local\Temp\3582-490\STEWART LOGO.EXE
    • C:\Users\Admin\AppData\Local\Temp\3582-490\STEWART LOGO.EXE
    • C:\Users\Admin\AppData\Local\Temp\STEWART LOGO.EXE
    • C:\Users\Admin\AppData\Local\Temp\STEWART LOGO.EXE
    • C:\Users\Admin\AppData\Local\Temp\facebook.exe
    • C:\Users\Admin\AppData\Local\Temp\notepad.exe
    • C:\Users\Admin\AppData\Local\Temp\notepad.exe
    • C:\Users\Admin\AppData\Local\Temp\taskmgr.exe
    • C:\Users\Admin\AppData\Local\Temp\taskmgr.exe
    • C:\Users\Admin\AppData\Local\Temp\tmp5023.tmp
    • C:\Windows\directx.sys
    • C:\Windows\svchost.com
    • C:\Windows\svchost.com
    • C:\Windows\svchost.com
    • C:\odt\OFFICE~1.EXE
    • memory/652-13-0x0000000000000000-mapping.dmp
    • memory/760-7-0x0000000000000000-mapping.dmp
    • memory/860-17-0x0000000000000000-mapping.dmp
    • memory/912-18-0x0000000000400000-0x00000000004B2000-memory.dmp
      Filesize

      712KB

    • memory/912-23-0x0000000000400000-0x00000000004B2000-memory.dmp
      Filesize

      712KB

    • memory/912-20-0x000000000048F888-mapping.dmp
    • memory/1016-10-0x0000000000000000-mapping.dmp
    • memory/1340-24-0x0000000000000000-mapping.dmp
    • memory/2336-75-0x0000000000000000-mapping.dmp
    • memory/2692-79-0x0000000000000000-mapping.dmp
    • memory/3016-2-0x0000000000400000-0x00000000004E4000-memory.dmp
      Filesize

      912KB

    • memory/3016-3-0x0000000000403248-mapping.dmp
    • memory/3016-6-0x0000000000400000-0x00000000004E4000-memory.dmp
      Filesize

      912KB

    • memory/3680-78-0x0000000000000000-mapping.dmp
    • memory/3884-0-0x0000000000000000-mapping.dmp
    • memory/3932-1-0x0000000000000000-mapping.dmp