Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    25-10-2024 01:23

General

  • Target

    rwrqrqrq.exe

  • Size

    658KB

  • MD5

    68cb9c61d6eb5f11e8107b166fef83e2

  • SHA1

    106f56b444c63b0487eef32f53accb892a6beb0b

  • SHA256

    31c4d97466554dd0511b6226a4877f176a49d2f41a90656b399de3a3a1081245

  • SHA512

    b057bb8ba484657b1311351703bb15e4e6148f4e3f2827198f062706b65b5f998d34be658b21c3877c9bc87cf1745b8c5eb500f7f6c01996286f420686d393c9

  • SSDEEP

    12288:+9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hv:KZ1xuVVjfFoynPaVBUR8f+kN10EB9

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

8.tcp.us-cal-1.ngrok.io:18582

Mutex

DC_MUTEX-84CFJ9A

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    WlVKwcLuNaTo

  • 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
  • Modifies firewall policy service 3 TTPs 3 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\rwrqrqrq.exe
    "C:\Users\Admin\AppData\Local\Temp\rwrqrqrq.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1796
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\rwrqrqrq.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1156
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\rwrqrqrq.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:2884
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1560
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:1928
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies firewall policy service
      • Modifies security service
      • Windows security bypass
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Windows security modification
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:2316
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2792

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    658KB

    MD5

    68cb9c61d6eb5f11e8107b166fef83e2

    SHA1

    106f56b444c63b0487eef32f53accb892a6beb0b

    SHA256

    31c4d97466554dd0511b6226a4877f176a49d2f41a90656b399de3a3a1081245

    SHA512

    b057bb8ba484657b1311351703bb15e4e6148f4e3f2827198f062706b65b5f998d34be658b21c3877c9bc87cf1745b8c5eb500f7f6c01996286f420686d393c9

  • memory/1796-51-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1796-0-0x0000000000270000-0x0000000000271000-memory.dmp

    Filesize

    4KB

  • memory/2316-56-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2316-52-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2316-53-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2316-54-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2316-55-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2316-57-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2316-58-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2316-59-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2316-63-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2316-65-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2792-50-0x00000000001E0000-0x00000000001E1000-memory.dmp

    Filesize

    4KB

  • memory/2792-12-0x0000000000080000-0x0000000000081000-memory.dmp

    Filesize

    4KB