Analysis

  • max time kernel
    149s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250502-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/05/2025, 10:02

General

  • Target

    256b244320bdb456feb3bccac7cd870698b1fa53b1fd32b39f02e03003284b75.exe

  • Size

    19KB

  • MD5

    32659ccf24b8bacc1e9e9d369a81b3e7

  • SHA1

    c091ca4860be26d14f7b950dec7ec504747a633f

  • SHA256

    256b244320bdb456feb3bccac7cd870698b1fa53b1fd32b39f02e03003284b75

  • SHA512

    06bbd263b9cc6a4b75085f7c5378aa40f81cee99a130b54cf4a44f0831ae7bc97eca0c6c7ddd34ea10740cb88ae62cef1269f2f53cf99571b7a24de2eccfc425

  • SSDEEP

    384:gBt7Br5xjL9AgA71FbhvP/KWLsqmFae+rOAqmFae+rOW:s7BlpppARFbhdLz8ae+rOn8ae+rOW

Malware Config

Signatures

  • Cosmu

    Cosmu is a Windows worm written in C++.

  • Cosmu family
  • Detects Cosmu payload 2 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (5329) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Drops file in Program Files directory 64 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\256b244320bdb456feb3bccac7cd870698b1fa53b1fd32b39f02e03003284b75.exe
    "C:\Users\Admin\AppData\Local\Temp\256b244320bdb456feb3bccac7cd870698b1fa53b1fd32b39f02e03003284b75.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:1636

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-343936533-1262634978-1863872812-1000\desktop.ini.tmp

          Filesize

          19KB

          MD5

          e87ffac661e69e7a9569ad822027772b

          SHA1

          10e8f13d5b38ba3ba4eb77d710756c6839921fe5

          SHA256

          b1b0ef8df090c6820c5169886bdb7432c41e6fd3857130eb392cb7312b75479f

          SHA512

          da107650ea5f4704f6877a81883a19d09fefa9ae07003ff474ff6d62b747f685ed7e42da1f33174e60ebf44ace2c3f35a0d347bb294a9cbf4b9ab6d2dc045987

        • C:\f21fae8705b262c53286e8\2010_x86.log.html.tmp

          Filesize

          100KB

          MD5

          449ee94a5bb80d20211c8a291f93085f

          SHA1

          3b069b45ceea0691a48627623234aa534fe40328

          SHA256

          ff579bb66b26a9ad3b76ab36525b43eabec773605e1886d828061bcaaab5e3df

          SHA512

          45392d9eec9671f3ba1bf22cebbac2ae46fb546a61ddc944cdc00cdc9db7abbef18727063ef71bdf67e79f2fd19c163687b659f55b04e01c84613c7e503366eb