Analysis

  • max time kernel
    150s
  • 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, 11:58

General

  • Target

    31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe

  • Size

    79KB

  • MD5

    6a43f3c8567cca14b422a3fe1b3b5a07

  • SHA1

    a16d10ded5e5cb3781c6f066db83370603b986b7

  • SHA256

    31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a

  • SHA512

    40523062a4ccee23e61724967aa1139723ed3dc75ec97c9da9431fb77c82665d52aaad97f0dc4b5d87bbc0d7e219d2ddc90628e738ed1f7b6dd534da7774fc12

  • SSDEEP

    768:s7BlpppARFbhdLz8ae+rOn8ae+rOoJhiJhYueGJhzAEaSXmlOT:s7ZppApdIIoJhiJhYueBFJlOT

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 (5091) 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\31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe
    "C:\Users\Admin\AppData\Local\Temp\31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:5828

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3690492401-2005096563-3427069815-1000\desktop.ini.tmp

          Filesize

          79KB

          MD5

          cd707033bc7da261f0bf288382dda4df

          SHA1

          c37bade11c20fa6bca07717e357cdcce3ea6d7ef

          SHA256

          79b5b4bc92c252977d6c60d143a8e2887b026d0a5054b795c64c2d1c4d53880a

          SHA512

          aff1af72bc6db1cb51cf0287532ffddaffa30fb8ddef836a91c02167a2a37d5657c5ba78d8b9ee131d16370d31d1923a5c9fc6d6611fcd4a836ff448145959c3

        • C:\f32c6debfbe15d219b06a854\2010_x64.log.html.tmp

          Filesize

          165KB

          MD5

          1a552ed95b39505da9389c3ec30c7579

          SHA1

          23e3e038f6b1e1f74e735ea18b7d56e0c10dadce

          SHA256

          6e8632a1d92aa6b16460949689889c32b2f7a4f27de0a30da8aea6b2748087ac

          SHA512

          881064655645d1fced42911825626692fc6240e0aaf21b224f09cbb9b0fea4cbf9d846e4d512acd0b9d804a964e494f2c104788106a93548e5bd8283807b1343