Analysis

  • max time kernel
    52s
  • max time network
    50s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29/10/2022, 13:08

General

  • Target

    c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069.exe

  • Size

    751KB

  • MD5

    ff033882fd3fb5e207376bf6c88e483a

  • SHA1

    4f2f1e0397b82a0a01c1ab5cd5b0ed4900746c32

  • SHA256

    c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069

  • SHA512

    827c471c6389a5b215eac0c88e5d4cf88ab72f626640d34e617c6cbdfa998c590a7b2ac1be921fad3426428124e0e7985776ea12024eea8347da94add5c8a0a8

  • SSDEEP

    12288:uoAD0ZjhqJ7RX0VIidy+6+M+u4GZDBPsX2S/Z+noPtGBpEU47mZ2bHJA8xzYi65b:uoACdARX6IF+6PKGZtM/Z+oFGrBamZ2u

Malware Config

Extracted

Family

darkcomet

Botnet

NEW

C2

m5tl.no-ip.biz:2271

Mutex

DC_MUTEX-P6L94WP

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    G55c97KT2sPR

  • 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 2 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 29 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069.exe
    "C:\Users\Admin\AppData\Local\Temp\c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1988
    • C:\Users\Admin\AppData\Local\Temp\c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069.exe
      C:\Users\Admin\AppData\Local\Temp\c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069.exe
      2⤵
      • Modifies WinLogon for persistence
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1736
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069.exe" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1720
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069.exe" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:1152
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1276
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:276
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • Deletes itself
        PID:572
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:740
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          4⤵
          • Executes dropped EXE
          PID:1640

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

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

          Filesize

          751KB

          MD5

          ff033882fd3fb5e207376bf6c88e483a

          SHA1

          4f2f1e0397b82a0a01c1ab5cd5b0ed4900746c32

          SHA256

          c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069

          SHA512

          827c471c6389a5b215eac0c88e5d4cf88ab72f626640d34e617c6cbdfa998c590a7b2ac1be921fad3426428124e0e7985776ea12024eea8347da94add5c8a0a8

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

          Filesize

          751KB

          MD5

          ff033882fd3fb5e207376bf6c88e483a

          SHA1

          4f2f1e0397b82a0a01c1ab5cd5b0ed4900746c32

          SHA256

          c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069

          SHA512

          827c471c6389a5b215eac0c88e5d4cf88ab72f626640d34e617c6cbdfa998c590a7b2ac1be921fad3426428124e0e7985776ea12024eea8347da94add5c8a0a8

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

          Filesize

          751KB

          MD5

          ff033882fd3fb5e207376bf6c88e483a

          SHA1

          4f2f1e0397b82a0a01c1ab5cd5b0ed4900746c32

          SHA256

          c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069

          SHA512

          827c471c6389a5b215eac0c88e5d4cf88ab72f626640d34e617c6cbdfa998c590a7b2ac1be921fad3426428124e0e7985776ea12024eea8347da94add5c8a0a8

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

          Filesize

          751KB

          MD5

          ff033882fd3fb5e207376bf6c88e483a

          SHA1

          4f2f1e0397b82a0a01c1ab5cd5b0ed4900746c32

          SHA256

          c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069

          SHA512

          827c471c6389a5b215eac0c88e5d4cf88ab72f626640d34e617c6cbdfa998c590a7b2ac1be921fad3426428124e0e7985776ea12024eea8347da94add5c8a0a8

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

          Filesize

          751KB

          MD5

          ff033882fd3fb5e207376bf6c88e483a

          SHA1

          4f2f1e0397b82a0a01c1ab5cd5b0ed4900746c32

          SHA256

          c3e979d3da9c48e0e9043c84a30c5e20572c443979850a362d5a1ae62cfb4069

          SHA512

          827c471c6389a5b215eac0c88e5d4cf88ab72f626640d34e617c6cbdfa998c590a7b2ac1be921fad3426428124e0e7985776ea12024eea8347da94add5c8a0a8

        • memory/740-81-0x0000000073B90000-0x000000007413B000-memory.dmp

          Filesize

          5.7MB

        • memory/740-76-0x0000000073B90000-0x000000007413B000-memory.dmp

          Filesize

          5.7MB

        • memory/1736-77-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1736-62-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1736-60-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1736-58-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1736-63-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1736-56-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1988-61-0x0000000074270000-0x000000007481B000-memory.dmp

          Filesize

          5.7MB

        • memory/1988-54-0x0000000075281000-0x0000000075283000-memory.dmp

          Filesize

          8KB

        • memory/1988-55-0x0000000074270000-0x000000007481B000-memory.dmp

          Filesize

          5.7MB