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Analysis

  • max time kernel
    152s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/10/2022, 00:43

General

  • Target

    b4cfc917699406360d986d7c44d4f58f08b549528c81add2834f17970ce7e29a.exe

  • Size

    212KB

  • MD5

    7267c79c98b4302c237d622cefac81e5

  • SHA1

    76492797a0681bf31a3f421d19c206fd8246e737

  • SHA256

    b4cfc917699406360d986d7c44d4f58f08b549528c81add2834f17970ce7e29a

  • SHA512

    8928bc6b47923672c143bee50fb007b78563bd709e71a7e4071822e9775110d1aff780b42846c4dada63fb3eab488d31e14a1a1fe5426244ec605bccd2f4691c

  • SSDEEP

    3072:AvCh2UjpESxFd3MiaDN/bG0sCOL5pNk+ZxDn/Sg7:oOFd3MiK/SxCOL5pDr

Score
10/10

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Executes dropped EXE 1 IoCs
  • 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 29 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b4cfc917699406360d986d7c44d4f58f08b549528c81add2834f17970ce7e29a.exe
    "C:\Users\Admin\AppData\Local\Temp\b4cfc917699406360d986d7c44d4f58f08b549528c81add2834f17970ce7e29a.exe"
    1⤵
    • Modifies visiblity of hidden/system files in Explorer
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4912
    • C:\Users\Admin\ryteil.exe
      "C:\Users\Admin\ryteil.exe"
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:3744

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\ryteil.exe

    Filesize

    212KB

    MD5

    a1ed2c06e924b41673ff4934c52cd3ac

    SHA1

    2dfe452ff5b90fb1baaa448afe025d06b52e126c

    SHA256

    a570f81631565be1912003c4e650a4cfe9704f53507104eda38270edc80a988a

    SHA512

    cbe3ad4465445c3724164938049e54f642e253d67cbbaee27d63b34be65fe437748e0c1e43f40397ed01d8aa8d16133ac6eae0a06b76bf3deb1fe90558fb7aa6

  • C:\Users\Admin\ryteil.exe

    Filesize

    212KB

    MD5

    a1ed2c06e924b41673ff4934c52cd3ac

    SHA1

    2dfe452ff5b90fb1baaa448afe025d06b52e126c

    SHA256

    a570f81631565be1912003c4e650a4cfe9704f53507104eda38270edc80a988a

    SHA512

    cbe3ad4465445c3724164938049e54f642e253d67cbbaee27d63b34be65fe437748e0c1e43f40397ed01d8aa8d16133ac6eae0a06b76bf3deb1fe90558fb7aa6