Analysis

  • max time kernel
    44s
  • max time network
    31s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    26-11-2022 23:24

General

  • Target

    5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe

  • Size

    1.6MB

  • MD5

    0620050df2e5a15c53b9035407c4cfbf

  • SHA1

    5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

  • SHA256

    5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

  • SHA512

    1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

  • SSDEEP

    24576:WF14CROX4GLhHexsQ8XqlAzpGNQUlFTH0dxXc/2hAqT9MI8SqVb8JNPTEJaE53:WF1pR4LhusCAF2d8dikAu9MzgzE4C

Malware Config

Extracted

Family

darkcomet

Botnet

bndbt

C2

imouttahere.no-ip.biz:1605

Mutex

DC_MUTEX-PPBR4G6

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    xPKZmVuPN7gy

  • install

    true

  • offline_keylogger

    true

  • password

    aerohigh

  • persistence

    false

  • 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
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 25 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe
    "C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1156
    • C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe
      C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:832
      • C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe
        "C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe"
        3⤵
        • Modifies WinLogon for persistence
        • Loads dropped DLL
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:680
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1964
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp\5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6.exe" +s +h
            5⤵
            • Sets file to hidden
            • Views/modifies file attributes
            PID:804
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1652
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
            5⤵
            • Sets file to hidden
            • Views/modifies file attributes
            PID:700
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1688
          • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
            C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1928
            • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
              "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
              6⤵
              • Executes dropped EXE
              PID:1988

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    1.6MB

    MD5

    0620050df2e5a15c53b9035407c4cfbf

    SHA1

    5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

    SHA256

    5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

    SHA512

    1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

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

    1.6MB

    MD5

    0620050df2e5a15c53b9035407c4cfbf

    SHA1

    5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

    SHA256

    5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

    SHA512

    1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

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

    1.6MB

    MD5

    0620050df2e5a15c53b9035407c4cfbf

    SHA1

    5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

    SHA256

    5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

    SHA512

    1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

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

    1.6MB

    MD5

    0620050df2e5a15c53b9035407c4cfbf

    SHA1

    5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

    SHA256

    5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

    SHA512

    1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

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

    1.6MB

    MD5

    0620050df2e5a15c53b9035407c4cfbf

    SHA1

    5a7cfa25d0c9e1ce1838310c450a5d3c1a81e62f

    SHA256

    5b2f4726b2508e3a148af9d1dcb32de589c0255df8c588ad7cd26ecc0b4510e6

    SHA512

    1f88713ff76982305fac2ced56f838ab36721e25c6589934cd25489ae8eb149555d8004c96a36aa9e8429cdfb69aeb59a91e8a660618799115bf146084cc8816

  • memory/680-88-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-75-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-68-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-73-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-71-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-70-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-76-0x000000000048F888-mapping.dmp
  • memory/680-66-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-77-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-61-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-79-0x0000000075091000-0x0000000075093000-memory.dmp
    Filesize

    8KB

  • memory/680-64-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-81-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/680-62-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/700-85-0x0000000000000000-mapping.dmp
  • memory/804-84-0x0000000000000000-mapping.dmp
  • memory/832-78-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/832-56-0x00000000004010B8-mapping.dmp
  • memory/832-55-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/832-80-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1156-54-0x0000000001330000-0x000000000142E000-memory.dmp
    Filesize

    1016KB

  • memory/1652-83-0x0000000000000000-mapping.dmp
  • memory/1688-87-0x0000000000000000-mapping.dmp
  • memory/1688-91-0x0000000000280000-0x000000000037E000-memory.dmp
    Filesize

    1016KB

  • memory/1928-93-0x00000000004010B8-mapping.dmp
  • memory/1928-102-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1964-82-0x0000000000000000-mapping.dmp
  • memory/1988-100-0x000000000048F888-mapping.dmp