Analysis

  • max time kernel
    150s
  • max time network
    137s
  • 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, 11:59

General

  • Target

    684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe

  • Size

    33KB

  • MD5

    9e694f8ce782f063a8e2db0e0ca14bcf

  • SHA1

    747ee307b9b4f1f09e200c92f303501ceba0b7ce

  • SHA256

    684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130

  • SHA512

    5af5bc153e38edd80296b595b5acc9c855dee141dd8a4fd0620800b3b6203f21a56fba532295aa54a754a50072334f89ec5452b5f80b22eac38903ad435690fd

  • SSDEEP

    768:s7BlpppARFbhdLz8ae+rOn8ae+rO+4500n1kJ00n1k+qAEJBqAEJb:s7ZppApdII+49101d

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 (5277) 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\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe
    "C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:2484

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

          34KB

          MD5

          156f6fe3dcaded100ed61c18bcbfd4c0

          SHA1

          aba5aa452c3050719d86cff9b297e10cefa246a9

          SHA256

          e0e005fd3ed44e662ce9a405014450cb14f5d989b7142600025a76bb3100eb92

          SHA512

          5510a67c38764d2574d844b8129a32f6427d2cb8223720d01ff9aba09aa687ab7590bcb08f4b40afbc20be83a01f030514f473e93ebc121bd204c5f5c2221e64

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

          Filesize

          119KB

          MD5

          d35608ec52edc7a35742e76a96af7b71

          SHA1

          6ab35c6c29fef77e486d561a03ad6c7e81211b7c

          SHA256

          a46ab5cf5fbf8962a58dfd8920b0af1e7f1df26ef041c6e459ea2bda24ef4863

          SHA512

          2d29d4979372a75d58d72eb0c42bf17d10c2a653d24d2e061d1c0d5e10b2734a7d76ccb7bcd848df3e662533e59e709306c0cb94f2e1ab308e9f84032d84dee8