Analysis

  • max time kernel
    141s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    24/04/2024, 17:22

General

  • Target

    71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe

  • Size

    72KB

  • MD5

    27bb69db8b617fbf8e73d1353997f70b

  • SHA1

    f2ed36842c9018a9570be7a6d7328fa07007539c

  • SHA256

    71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9

  • SHA512

    f360d797cf93219a5c745d7e0ae420104d40f9effa110963ee427cd3589012fa16ff57a695a3ad231575c248e592199ae5c0107c07cb0c974aaa0d87e9242d24

  • SSDEEP

    1536:Or3Z5IfQmv81abyyXcZibfffsffffClllm:SJOfQm010yyXcZ6lllm

Score
9/10

Malware Config

Signatures

  • Detects Windows executables referencing non-Windows User-Agents 1 IoCs
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe
    "C:\Users\Admin\AppData\Local\Temp\71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Windows\SysWOW64\attrib.exe
      attrib +a +s +h +r C:\Windows\Debug\ayahost.exe
      2⤵
      • Sets file to hidden
      • Drops file in Windows directory
      • Views/modifies file attributes
      PID:2408
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\712350~1.EXE > nul
      2⤵
      • Deletes itself
      PID:2168
  • C:\Windows\Debug\ayahost.exe
    C:\Windows\Debug\ayahost.exe
    1⤵
    • Executes dropped EXE
    PID:2816

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\Debug\ayahost.exe

    Filesize

    72KB

    MD5

    21e994fd7478d0d49bc273c5d5584aa4

    SHA1

    a43d5e8ef0151c43323d0edf94164e35a2dc69e3

    SHA256

    94d295d857a201eb4ad9575d0aca92843c870fcd3f7849b99ede7bc04b257f08

    SHA512

    8d57af7fd6a831325add4dead8ef9ff2133334225a45244a71f6082e1e751fe86095d2e66fd530223bf3262c4d8b624026b5ff2ada31c10e5fbc3927173b9c8e