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
    05/06/2025, 08:17

General

  • Target

    aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe

  • Size

    27KB

  • MD5

    4a79767c29563c4595e4fd9bc2205446

  • SHA1

    e615101dcfa8ed975b56c53481dda9b51bc9b957

  • SHA256

    aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343

  • SHA512

    4358b90a6960956625764d4fe9c841274b39f3e88321adf9e24bc40eca3e9be5baea6246fceaad3a41861fc5ba36a2c73d931eadc2d6f577bdc58ed39d255c73

  • SSDEEP

    768:uZ4FLz8ae+rOn8ae+rO44Ph4PmbX8xsni1xDbX8xsni1xQ:uGII4ehem7AP7A0

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 (5357) 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\aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe
    "C:\Users\Admin\AppData\Local\Temp\aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:1068

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-2117256398-1057710415-2142084777-1000\desktop.ini.tmp

          Filesize

          27KB

          MD5

          a2a80b71f06a640ee18b706594a0f994

          SHA1

          6169b54cc28fc032c8f2cff531e3d1acb21550aa

          SHA256

          a046022659872a2c19bcbca346d720ee18d8ef7167f86fa2b1c0bd6fa8a0ae9e

          SHA512

          67502325f61bb71129f1186efdb6068c77ae84515713d566736bac27c599e75800b8120d3c9ab975afe922f509951af642a412d25773ee4219a4df1ee425e5ba

        • C:\c8b37a19c794785c97\2010_x86.log.html.tmp

          Filesize

          107KB

          MD5

          ae010603a644b5537a0c73a400fbd8ca

          SHA1

          8381af5c457a00120ab983b58efb2fb9cb875b14

          SHA256

          f960cf0e736c85ef09a7a21e7871610f5bb5593a07783f1030000cca2e9ad510

          SHA512

          77f81fd7f9131c09c82348fe784640738e3c1d090eef9d17138880cd0e588609c5e97f752f569ecff4fed49b7836b8bb2c9a6aed8c657777882450ae8d07629f

        • memory/1068-1229-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB