Analysis

  • max time kernel
    150s
  • max time network
    141s
  • 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, 11:58

General

  • Target

    8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe

  • Size

    41KB

  • MD5

    acf717a3b3c2078d564c5ead80c56ee4

  • SHA1

    4613ec80419f2c13933c6f73d9b0f1061a41fcbc

  • SHA256

    8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5

  • SHA512

    26c65d2fa57819c629ce8792dff04a2f02fa1693089ea5f840c3a85a8d85df29d74163f2abcbe43758f27deab554261aeba697365ab7c2f1f51f202750c7b2f4

  • SSDEEP

    384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOr9NNV5H/V36aNQP+OKGDw9ce9cwwlws:uZ4FLz8ae+rOn8ae+rO2aNQP+UDQvh4J

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 (5222) 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\8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe
    "C:\Users\Admin\AppData\Local\Temp\8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4856

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3674642747-2260306818-3009887879-1000\desktop.ini.tmp

          Filesize

          41KB

          MD5

          ef393c331c1b8b110da62e36b7146a4d

          SHA1

          37ec511e573fded7fe306122659d9ec982aeed1a

          SHA256

          1cebf98b58e8053b3b3cf90e3b7e9a04ea14d84a6f02b16c24153af41a19aac1

          SHA512

          ddf0a53c87f17382dc25a85e0b96ff584bb0d25626b18d9d3348c48d27c06ec79a0bee0e150c6ab517068394a137934afed77f798647163a5ad7488252301440

        • C:\967f022c4c136664abfad56c1fb73a\2010_x86.log.html.tmp

          Filesize

          122KB

          MD5

          923b2061d42cd53fbc07dff7a59bcbf1

          SHA1

          c463f5178a430614ad8601be5ce5c5664ca95f6c

          SHA256

          0426b0a98faa084fecea7f3c1a05c7ccdf75110221522e37cf1e436e3b3c68d5

          SHA512

          917b52cf6b46f780764e0ef81245ee0404bf98608e0cc9cc8e4b335023b2fd3e2b8d08ec4c2ac39a5ec46fd17fe2e7f52a173321172c12bbd205cdccf71e8683

        • memory/4856-803-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB