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
    29/05/2025, 10:01

General

  • Target

    1705207dec682ebd7df90665c61d3283a7c3ec84ae3fe21cdda0c940601855a3.exe

  • Size

    66KB

  • MD5

    cd658d188b84374422d8941d05503cc5

  • SHA1

    4fd03294e2eb761d99cbee2b006d25c3f891729e

  • SHA256

    1705207dec682ebd7df90665c61d3283a7c3ec84ae3fe21cdda0c940601855a3

  • SHA512

    5c221820da29899167c39b70f3281ad12168f4c3d1fe44814fa35b9ded491c5c40abdee5bd4876f5538bd15d1e0899323b52927b28015794e7e38206a2cb2987

  • SSDEEP

    384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOIW2JhuC2JhuOxAxoraygJmMvJvx:uZ4FLz8ae+rOn8ae+rOoJhiJhY9

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 (5198) 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\1705207dec682ebd7df90665c61d3283a7c3ec84ae3fe21cdda0c940601855a3.exe
    "C:\Users\Admin\AppData\Local\Temp\1705207dec682ebd7df90665c61d3283a7c3ec84ae3fe21cdda0c940601855a3.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:2572

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-779059454-4269757009-3780780039-1000\desktop.ini.tmp

          Filesize

          66KB

          MD5

          66584af05b60699e3403c844398c8a7b

          SHA1

          e61542abe47c50bd59f9ff431d56e9183cfee83f

          SHA256

          ebb600442cd19514116c100e117574ba4a4599e99d49c3e4bb278d3b7ec75a44

          SHA512

          d1a10402a5502b5e004d6a9acc0e04b65b06746f2c82b173d1223f1fc3b267eabf4285b6e4916e0e347815e8f6cc99bab1620661648ac713839c333c2a964963

        • C:\e62b36dd3cccbd0b2c8aefa1fa8db0\2010_x86.log.html.tmp

          Filesize

          147KB

          MD5

          b879adac87900feb0a4da7e92110b2d8

          SHA1

          6d32cef9e30e4818cc9daa418a76dd2ffbd9ed84

          SHA256

          7cabe3ad3bc0006e971237355ec23269cea623c6018b5949d7e05cd620fe70fe

          SHA512

          b8ecd0aae3496a09f9982fdac7fec5c5b77ca7150c767bc1d4d84946b15966fc325358cb6a982f46b0787a09f8b368439a537c12388899089bde7d4ac3cb5b19

        • memory/2572-1115-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB