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
    05/06/2025, 08:15

General

  • Target

    87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe

  • Size

    22KB

  • MD5

    8b2f4ef74e4a20c23bc281110705ab70

  • SHA1

    b723dcc235faa790924821c84cd9d375fbae180c

  • SHA256

    87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182

  • SHA512

    88e19e4080ac010f41c5a83b26c5b6183025ad120681fe3fa50a80f4c2d54ec34ab394e2965318394226471c3d6f146cbabe63048132d2296b8fc3fe3a389ff9

  • SSDEEP

    384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOiOZ2OZW0i90ixyX:uZ4FLz8ae+rOn8ae+rOWdxyX

Malware Config

Signatures

  • Cosmu

    Cosmu is a Windows worm written in C++.

  • Cosmu family
  • Detects Cosmu payload 1 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (5359) 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\87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe
    "C:\Users\Admin\AppData\Local\Temp\87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:2080

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-330179853-1108322181-418488014-1000\desktop.ini.tmp

          Filesize

          22KB

          MD5

          8823f741c74d4e7c8d65837c5a5fa010

          SHA1

          f5cc66373ed63a44aa8b39273d7fdc1afc1d8b39

          SHA256

          59846c783bc1a570db99aa8100772e43cf493132ed9d994fd0082b014e4c0085

          SHA512

          38327d1b50aa6e9bda8a72a9985e0fea2456a4283e12ac58a66d4a73767389dc86773633e9c0b60874b04542dd9b6e98cc8d64c0eb493b4df7daf4a3bc71d575

        • C:\b5678467481f56688dc2ce816954\2010_x86.log.html.tmp

          Filesize

          103KB

          MD5

          af1475e0b24b8dfccbf1c6ca8bb9ab7b

          SHA1

          61a1e44a428cc984ebf7c89f336f7e538c1eb8e9

          SHA256

          07cad12750fcf4ffd78430900065b8bfa2ced809ea44fdb3db7a102945957cae

          SHA512

          aec14f3cdde63374adf367549da31f6453dc91c5f4dcdfb44aa205e08c86fdbca1bbc85e6ac7cf8548718ca6c4bf451486d293672ea11d1288bbfb55ba715432

        • memory/2080-1225-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB