Analysis

  • max time kernel
    149s
  • max time network
    102s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250508-en
  • resource tags

    arch:x64arch:x86image:win11-20250508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    05/06/2025, 08:15

General

  • Target

    035f93695a50583c38d9a608ba3f3f3465119c31821e16384dc2579a49794e5d.exe

  • Size

    22KB

  • MD5

    4d072e3966ff1328f1e37b0358f85476

  • SHA1

    1b8b11bb47169cb3ac0db99ee982c1d013624cf0

  • SHA256

    035f93695a50583c38d9a608ba3f3f3465119c31821e16384dc2579a49794e5d

  • SHA512

    cdb0ef28de61a8a50de206a0a874c1e533423b302dc1e0e0da6d697678a971da9e28392fc0c93001f7e718ee591b28b0b1b835e8238261344d9e662cda623e9a

  • SSDEEP

    384:gBt7Br5xjL9AgA71FbhvP/KWLsqmFae+rOAqmFae+rOiOZ2OZoaqyklYWynDyklM:s7BlpppARFbhdLz8ae+rOn8ae+rOka5i

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 (5357) 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\035f93695a50583c38d9a608ba3f3f3465119c31821e16384dc2579a49794e5d.exe
    "C:\Users\Admin\AppData\Local\Temp\035f93695a50583c38d9a608ba3f3f3465119c31821e16384dc2579a49794e5d.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:2428

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3687046934-3833731302-526866946-1000\desktop.ini.tmp

          Filesize

          22KB

          MD5

          e0953c09c60c98ccd245f762a670eec8

          SHA1

          c96c85ddab20c2bc70c82fa022da8c396324a0a6

          SHA256

          bf7fcc62daed6ff45ff6d797740a2c7c48ef196a437672ad78c25f20b6fb4377

          SHA512

          c08181dc13e36d12749962c17466c5ecfcafc0967f46ed7db1afd3dbf2227b809afb4704e875199515a067f1460330b8d1e579765718ddeecc23c7b5115e4977

        • C:\b9147e4cea9b95b6635d\2010_x86.log.html.tmp

          Filesize

          103KB

          MD5

          5964526d2817df4a017b630eb209b319

          SHA1

          5ca284d0a1c759ad1d5ccc511dcbeb5da93f54e4

          SHA256

          1cb848ca91af3e109ad4c946a838e3e1ac43602dfa32733a0f666dfb9d693418

          SHA512

          0425accc7ff518a72ac4b463bae8898c78d1bede8b6600d1900a84d0eb2dceed2c346d2e527537bbc9cde6d607dcd6ec141abca1b1fd8090165ef5cda927e611