Analysis

  • max time kernel
    150s
  • max time network
    102s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250502-en
  • resource tags

    arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    29/05/2025, 14:07

General

  • Target

    420dff3765d823584ac2d91c17d3f03103b89fdc1c30993c6a4834bc976ba761.exe

  • Size

    38KB

  • MD5

    aede2dfb077f70e26175c5e385378632

  • SHA1

    5f2218409dae60500b8ee6f6f0e186245b5a2348

  • SHA256

    420dff3765d823584ac2d91c17d3f03103b89fdc1c30993c6a4834bc976ba761

  • SHA512

    e20873343a4d1d65f6a90a1e8e6d32ff45971d7a9370054812aa3822a6d8f05b111f6ede16aac5b01ccae8e6a62e6b089a285921b2e29da8d3b64cce6a25f1b1

  • SSDEEP

    768:s7BlpppARFbhdLz8ae+rOn8ae+rO2aNQP+UDQvu:s7ZppApdIIJQP+UDQvu

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 (5285) 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\420dff3765d823584ac2d91c17d3f03103b89fdc1c30993c6a4834bc976ba761.exe
    "C:\Users\Admin\AppData\Local\Temp\420dff3765d823584ac2d91c17d3f03103b89fdc1c30993c6a4834bc976ba761.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:5240

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-1454956602-4007834095-2135319884-1000\desktop.ini.tmp

          Filesize

          38KB

          MD5

          0c205e4a33c9d24a49f463a1ff626f5e

          SHA1

          8bd3790e4e7ee86fcb87851b63c8ef61e3066440

          SHA256

          85c9a24a8b42a188535f2b97a0c1efdece4a4e9f2e8b17950c8f544e6625b7c1

          SHA512

          b30a34efd996b3c448f1ba692f0bf73c76e0324f44fed6f7cd8ee42b96e4aea1089b3dcf3baf46cd51c54e28ef0b4cdea916f156396852cf5bccfa2c0ae46744

        • C:\d556e8f40e1fe2150ce3c75a1b83\2010_x86.log.html.tmp

          Filesize

          120KB

          MD5

          43a1dbc0f422c8053a62e8a3e56cd61b

          SHA1

          6898acd905759fd12ca8267fc918d253b48eb019

          SHA256

          a9dbfdd886f5d7ce87bb026a3ea5d0bba495ce12660c2a8213d5c749f075d835

          SHA512

          91143bc768e90daf8607fa03830fa95677c051e299dd361853e28b95d840faedad73d7fa724d986c3d20cc7e0a9478df929804a7b72949e3e0de03f045de7b48