Analysis

  • max time kernel
    149s
  • max time network
    134s
  • 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, 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 (5204) 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:4976

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3920234085-916416549-2700794571-1000\desktop.ini.tmp

          Filesize

          38KB

          MD5

          5819c84b510a1a83d41ab3d37e5e8e6d

          SHA1

          279ef4f82336fac6573110b5d8d21e27f6d36385

          SHA256

          4d4ec3502638c64dfa9696f0853308dce4ffb56a837f4448ebfcbde5dde2cee3

          SHA512

          60dcb3e811fbe65a181967c8dec94126ada632a88923bf3e4ab5a9e43d52c223532bfc96d16dacb7bcd95fb521e0dd42c96aa7e73a8d9bd3f4d63172aef66005

        • C:\6eaadd5e1536cd09900c16de307910\2010_x86.log.html.tmp

          Filesize

          120KB

          MD5

          9eb634c618760aa30f4263f11166c69f

          SHA1

          1540e1b9c8ccdfdeef8d5cf01b78a8ad2d318893

          SHA256

          0ad8404e2ea58553d66751d96ec3710ba4cc305da570df4640fce246a7d42e5f

          SHA512

          9a02c250cf03f95d4ab541308768f5c8ae2ae5f600cf87561c2af437ac39ac24ad5b1acb7000e9a042d9aea29ff342362ac7bbeb381cdf5fb2f677ee14dd0d56