Analysis

  • max time kernel
    150s
  • max time network
    103s
  • 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

    3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe

  • Size

    33KB

  • MD5

    081992eb1480801df44c28dcfeee542f

  • SHA1

    024ffc4694af9734d1032294171fd20e2618fa2a

  • SHA256

    3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52

  • SHA512

    dbbb11b7d1cfd55dcd205c3161f9e03ca1c2f66b1705e9c67000657ac6ae46cd07dad4c52199f4c76410d01326a24322816ae1e541a6d0f1a40a3ed583a5aac2

  • SSDEEP

    384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOYE/AE/DZKNZKy7MwlwWP3:uZ4FLz8ae+rOn8ae+rOrZkZ/7M45P3

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 (5361) 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\3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe
    "C:\Users\Admin\AppData\Local\Temp\3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:328

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-330179853-1108322181-418488014-1000\desktop.ini.tmp

          Filesize

          33KB

          MD5

          be3b3cf126d8af7c509e75d751dd47cd

          SHA1

          eacb9b8210fce639fef9500c9f21d7a1c5343aa6

          SHA256

          f1475ca535a2d73ea719a14524036a5e4f1beefb7a547846599ae0c31e83acb8

          SHA512

          43867cc094badd288eaed9cf245e8d4bf51753273ba64a87c72d0870d04c115f47bbfb03e49ceb778a1c5177b99cfb341372325dd6bef8b6f84749dc4ecb858a

        • C:\b5678467481f56688dc2ce816954\2010_x86.log.html.tmp

          Filesize

          114KB

          MD5

          e585fe76fc991d9e3e8c7efe8814898a

          SHA1

          0c89a1bf35f909ec435de952ef98e2052359232e

          SHA256

          52d6b91c7abe0dd87d100d5571483d87d543af68b7f47afe7ad272d435218727

          SHA512

          1714afc4794d3618e72b6016903bdb40b2d4c582983bfd27b1bcbb60874b1aaf84550787dc7760c2b5145b03f39cf6ef00fe503d6712235be79c208272337cfe

        • memory/328-1231-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB