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Analysis

  • max time kernel
    188s
  • max time network
    193s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/11/2022, 16:02

General

  • Target

    707cae5691796c3ebdd8940831948d0e49965e33e4f0384edba8e1969158bd02.exe

  • Size

    661KB

  • MD5

    081479fd083ec172e9a7c23caba03bb1

  • SHA1

    e7cb1abdef3384ca5ac1a31c2c791a84304926e9

  • SHA256

    707cae5691796c3ebdd8940831948d0e49965e33e4f0384edba8e1969158bd02

  • SHA512

    261cab6c1c3cdba1783b89a15c3b4c6e3e7bee8a4b129c9c9abf511d35f7f4658fea67a561ce775498a7a9df4311357670119ba67acc1f210830baf8c147a900

  • SSDEEP

    12288:MXhpvNWw276S/DuoeFcfbmiJ99VPhYR5MTSHvLenELrWv1lZw4JuMkMh/fy452UR:anAw2WWeFcfbP9VPSPMTSPL/rWvzq4Jh

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

shizzlekid.zapto.org:1919

Mutex

DC_MUTEX-NE6UK92

Attributes
  • InstallPath

    MSDCSC\microsoft.exe

  • gencode

    YcKFVzKEhbEr

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    Microsoft

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 1 IoCs
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\707cae5691796c3ebdd8940831948d0e49965e33e4f0384edba8e1969158bd02.exe
    "C:\Users\Admin\AppData\Local\Temp\707cae5691796c3ebdd8940831948d0e49965e33e4f0384edba8e1969158bd02.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2764
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\707cae5691796c3ebdd8940831948d0e49965e33e4f0384edba8e1969158bd02.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5016
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\707cae5691796c3ebdd8940831948d0e49965e33e4f0384edba8e1969158bd02.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:4852
    • C:\Users\Admin\Documents\MSDCSC\microsoft.exe
      "C:\Users\Admin\Documents\MSDCSC\microsoft.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1484
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
          PID:1416

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      Filesize

      661KB

      MD5

      081479fd083ec172e9a7c23caba03bb1

      SHA1

      e7cb1abdef3384ca5ac1a31c2c791a84304926e9

      SHA256

      707cae5691796c3ebdd8940831948d0e49965e33e4f0384edba8e1969158bd02

      SHA512

      261cab6c1c3cdba1783b89a15c3b4c6e3e7bee8a4b129c9c9abf511d35f7f4658fea67a561ce775498a7a9df4311357670119ba67acc1f210830baf8c147a900

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

      Filesize

      661KB

      MD5

      081479fd083ec172e9a7c23caba03bb1

      SHA1

      e7cb1abdef3384ca5ac1a31c2c791a84304926e9

      SHA256

      707cae5691796c3ebdd8940831948d0e49965e33e4f0384edba8e1969158bd02

      SHA512

      261cab6c1c3cdba1783b89a15c3b4c6e3e7bee8a4b129c9c9abf511d35f7f4658fea67a561ce775498a7a9df4311357670119ba67acc1f210830baf8c147a900