Analysis

  • max time kernel
    150s
  • max time network
    134s
  • 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, 08:14

General

  • Target

    b915e7033b022809456a0832d0e2bdffbe3eba14e36771092aba299f650515aa.exe

  • Size

    26KB

  • MD5

    fa24406f7dced91a8d217b89fcf5edcf

  • SHA1

    3acbdd164372f9844b92346603c64f970c8079fa

  • SHA256

    b915e7033b022809456a0832d0e2bdffbe3eba14e36771092aba299f650515aa

  • SHA512

    5b9fd0b3dd6678f5e8661ebf0fbde70effd7f6bd62ee4c03d8bf7c0241786ae4908deebc5f5d8ddb0513c4bc539ecdec6fdf92f3988c273d6eab31bb44d603b9

  • SSDEEP

    384:gBt7Br5xjL9AgA71FbhvP/KWLsqmFae+rOAqmFae+rOb8p8dWA8dWK:s7BlpppARFbhdLz8ae+rOn8ae+rOb8N

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 (5203) 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\b915e7033b022809456a0832d0e2bdffbe3eba14e36771092aba299f650515aa.exe
    "C:\Users\Admin\AppData\Local\Temp\b915e7033b022809456a0832d0e2bdffbe3eba14e36771092aba299f650515aa.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:1336

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3951986358-4006919840-1009690842-1000\desktop.ini.tmp

          Filesize

          26KB

          MD5

          b19f2ea7d3406b4de337a753e11f230c

          SHA1

          23cc90cd4896f92278327b2c09bf2e612acc849b

          SHA256

          d94a3c24cbb3b5d9f0656efbcff5db83d41b51e41b6603184a9ed83754dfd3e1

          SHA512

          56615fd628730aba27b384dc5630fda9f987bdc9df4fc2289dab0f0e8c2f8223149fe456b709b5ccd3a4ca538dcb2fa982bdca3c9e907e9676e5109bd0c191af

        • C:\e871de07eca81c0a47\2010_x86.log.html.tmp

          Filesize

          107KB

          MD5

          162f8a135f62f7609e53bfea42dc3369

          SHA1

          f838222a387a02cf762269e18c06aa7f448a98a9

          SHA256

          ed95f0543c6dc6d7ead8a8f5dda4ca8f297fc33a282159da2b455aa6d727d267

          SHA512

          a0193e2f65910c1584c16c40024c238e492c16606e1c723d9145f448b6edc0509acc154500b29c9fc849a416458aefe6fc2d6f813452c191994a3b3c8e1429fe