Analysis

  • max time kernel
    150s
  • max time network
    102s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250619-en
  • resource tags

    arch:x64arch:x86image:win11-20250619-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    03/07/2025, 05:26

General

  • Target

    d1583f19bce89b61829f036bb1856cbc8eb5a912bb6e2672e6d9806edba192b0.exe

  • Size

    28KB

  • MD5

    6ba02c3b1bbd1f3526e98624a714f317

  • SHA1

    91d9f99383564c255d50fb326f54232bbe6d9b6c

  • SHA256

    d1583f19bce89b61829f036bb1856cbc8eb5a912bb6e2672e6d9806edba192b0

  • SHA512

    1bc2e6b737a2731cf82a46adddc5786046dafcdc9d24549c729c7d7c03487a048775bdf524918267a78d11b2c69f834fdc985771ba6b513f13eb0fa76b94767c

  • SSDEEP

    768:uZ4FLm8Q8Boxn6oxSoxn6ox1YFlLYFlnb9g:uGsx1xtx1xWgn9g

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 (5365) 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\d1583f19bce89b61829f036bb1856cbc8eb5a912bb6e2672e6d9806edba192b0.exe
    "C:\Users\Admin\AppData\Local\Temp\d1583f19bce89b61829f036bb1856cbc8eb5a912bb6e2672e6d9806edba192b0.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:1696

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-625765727-1271952295-745797415-1000\desktop.ini.tmp

          Filesize

          28KB

          MD5

          01c333214b5802f9008927499c7e6836

          SHA1

          dcb4f93c13c8fc92f91cde393d4e2c158eefb417

          SHA256

          593cf325efd7e3ca87689483827004fee83ee0583d7f05887d4499dc0017bccd

          SHA512

          90e014fd4b340965e254348e868db37d42a286fb57f853b24c36467dbecd8c51b83fceb5a8b7e2354040db8047fcf01722c6d338a8a301a29232863d3b642e5e

        • C:\ecd7b64386840f62c0ab2e4490\2010_x86.log.html.tmp

          Filesize

          109KB

          MD5

          dae54d509b548e5e7d31c2f361c0dc2a

          SHA1

          e7e2b910e572c61b2032c5865c256ba2b10e11be

          SHA256

          e6faeff46b1dec0a7e9d3a414df9c637b241e472836931dab979cb1670a4cc40

          SHA512

          38c8c32d81b16202e3a138d5554c99c11beaf7c22ce7108a789a1645b749eada69aa2a31fdb8f988380cc73efaa0d831b239bcac9095776d40b59e7683e669a5

        • memory/1696-1221-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB