Analysis

  • max time kernel
    150s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250502-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/06/2025, 08:18

General

  • Target

    2c05e3341362b0581f72dc9f94247d40654cc379996f4e0f8a88423d5a3fb0c4.exe

  • Size

    36KB

  • MD5

    76174bab38f45c18422defca74ea8b3d

  • SHA1

    f499a0c929d81c05d7c51f6fbdf389e89c16a6c4

  • SHA256

    2c05e3341362b0581f72dc9f94247d40654cc379996f4e0f8a88423d5a3fb0c4

  • SHA512

    6a67409ef9a2d98ff2ef1d98be763c066e36b24708c2a682ff397247484bd03539eaafac3d1f62e9e9d609bacbf55fd1931e4c6fb5d86a7603ce7238f311ceba

  • SSDEEP

    768:s7BlpppARFbhdLz8ae+rOn8ae+rO2aNQP+UDQvCJO:s7ZppApdIIJQP+UDQv7

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 (5043) 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\2c05e3341362b0581f72dc9f94247d40654cc379996f4e0f8a88423d5a3fb0c4.exe
    "C:\Users\Admin\AppData\Local\Temp\2c05e3341362b0581f72dc9f94247d40654cc379996f4e0f8a88423d5a3fb0c4.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4768

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-2930597513-779029253-718817275-1000\desktop.ini.tmp

          Filesize

          37KB

          MD5

          f46cc6e53805e2d155476074297d5b70

          SHA1

          40ef949a597709d59fb77e750d3db890cc00b568

          SHA256

          37e4bf6804adead167f2df189e754f29f9e4f984f7bd500973672b0b9313669b

          SHA512

          b2d7e1c582c88f18ca74e235a41a004e96ff5873afa4a88919c45183efd267ae2d1e69817865b411916b0337cc44f76237d97c8a3ef9bfe41e5766a630e35aef

        • C:\6479eedf55783993fe56765264\2010_x86.log.html.tmp

          Filesize

          118KB

          MD5

          0cc1dc362b81f5243de1df8af03bfd68

          SHA1

          1d939d251e7db216984a3f93df72fc4a580c2675

          SHA256

          2a6adfd6cfcd3a049457f276c462906a03a057eee3bb2af9e203e82a48eb13c9

          SHA512

          49df1052fabfb72c259f2dbce51e7d9deb88a1356caa903131e5a1805358d6ce061405226bf19927c00689a2c088b02b30f283286b6d4f895941bb35904c3a15