Analysis

  • max time kernel
    155s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    31-08-2021 10:24

General

  • Target

    802b67f035f6b75aa99b4c04c7701ca80f132ec5007d066f04c174e304423f94.exe

  • Size

    797KB

  • MD5

    2ca8be7c1b7b9d4addcdd8643b37faf8

  • SHA1

    4282592b2dda12b1385575b7686e741e5af9e178

  • SHA256

    802b67f035f6b75aa99b4c04c7701ca80f132ec5007d066f04c174e304423f94

  • SHA512

    b81531ded14a93fa7a6136ce721bc79cc113b4745d226acddb73067d5f628469820eb40b233b0de2fe5526c413914b51f24ec4533710b19d37842d307a754f93

Malware Config

Extracted

Family

darkcomet

Botnet

enayi avc�s�

C2

8.tcp.ngrok.io:18922

8.tcp.ngrok.io:11390

Mutex

DC_MUTEX-JJADN00

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    LHGZ2Ktc5bFu

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    Owo Para

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies security service 2 TTPs 2 IoCs
  • Windows security bypass 2 TTPs
  • Disables Task Manager via registry modification
  • Executes dropped EXE 1 IoCs
  • Sets file to hidden 1 TTPs

    Modifies file attributes to stop it showing in Explorer etc.

  • Loads dropped DLL 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\802b67f035f6b75aa99b4c04c7701ca80f132ec5007d066f04c174e304423f94.exe
    "C:\Users\Admin\AppData\Local\Temp\802b67f035f6b75aa99b4c04c7701ca80f132ec5007d066f04c174e304423f94.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1668
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\802b67f035f6b75aa99b4c04c7701ca80f132ec5007d066f04c174e304423f94.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1688
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\802b67f035f6b75aa99b4c04c7701ca80f132ec5007d066f04c174e304423f94.exe" +s +h
        3⤵
        • Views/modifies file attributes
        PID:1420
    • 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:1532
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Views/modifies file attributes
        PID:1692
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\MSDCSC\msdcsc.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies security service
      • Executes dropped EXE
      • Windows security modification
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:1724
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Modifies security service
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1764
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
            PID:616

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Modify Existing Service

    1
    T1031

    Hidden Files and Directories

    2
    T1158

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    6
    T1112

    Disabling Security Tools

    2
    T1089

    Hidden Files and Directories

    2
    T1158

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\MSDCSC\msdcsc.exe
      MD5

      2ca8be7c1b7b9d4addcdd8643b37faf8

      SHA1

      4282592b2dda12b1385575b7686e741e5af9e178

      SHA256

      802b67f035f6b75aa99b4c04c7701ca80f132ec5007d066f04c174e304423f94

      SHA512

      b81531ded14a93fa7a6136ce721bc79cc113b4745d226acddb73067d5f628469820eb40b233b0de2fe5526c413914b51f24ec4533710b19d37842d307a754f93

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\MSDCSC\msdcsc.exe
      MD5

      2ca8be7c1b7b9d4addcdd8643b37faf8

      SHA1

      4282592b2dda12b1385575b7686e741e5af9e178

      SHA256

      802b67f035f6b75aa99b4c04c7701ca80f132ec5007d066f04c174e304423f94

      SHA512

      b81531ded14a93fa7a6136ce721bc79cc113b4745d226acddb73067d5f628469820eb40b233b0de2fe5526c413914b51f24ec4533710b19d37842d307a754f93

    • \Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\MSDCSC\msdcsc.exe
      MD5

      2ca8be7c1b7b9d4addcdd8643b37faf8

      SHA1

      4282592b2dda12b1385575b7686e741e5af9e178

      SHA256

      802b67f035f6b75aa99b4c04c7701ca80f132ec5007d066f04c174e304423f94

      SHA512

      b81531ded14a93fa7a6136ce721bc79cc113b4745d226acddb73067d5f628469820eb40b233b0de2fe5526c413914b51f24ec4533710b19d37842d307a754f93

    • \Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\MSDCSC\msdcsc.exe
      MD5

      2ca8be7c1b7b9d4addcdd8643b37faf8

      SHA1

      4282592b2dda12b1385575b7686e741e5af9e178

      SHA256

      802b67f035f6b75aa99b4c04c7701ca80f132ec5007d066f04c174e304423f94

      SHA512

      b81531ded14a93fa7a6136ce721bc79cc113b4745d226acddb73067d5f628469820eb40b233b0de2fe5526c413914b51f24ec4533710b19d37842d307a754f93

    • memory/616-75-0x0000000000000000-mapping.dmp
    • memory/616-78-0x0000000000220000-0x0000000000221000-memory.dmp
      Filesize

      4KB

    • memory/1420-64-0x0000000000000000-mapping.dmp
    • memory/1532-63-0x0000000000000000-mapping.dmp
    • memory/1668-61-0x0000000000240000-0x0000000000241000-memory.dmp
      Filesize

      4KB

    • memory/1668-60-0x00000000757D1000-0x00000000757D3000-memory.dmp
      Filesize

      8KB

    • memory/1688-62-0x0000000000000000-mapping.dmp
    • memory/1692-65-0x0000000000000000-mapping.dmp
    • memory/1724-68-0x0000000000000000-mapping.dmp
    • memory/1724-77-0x00000000001D0000-0x00000000001D1000-memory.dmp
      Filesize

      4KB

    • memory/1764-73-0x000000000048F888-mapping.dmp
    • memory/1764-72-0x0000000000400000-0x00000000004D4000-memory.dmp
      Filesize

      848KB