Analysis

  • max time kernel
    150s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250502-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/05/2025, 10:04

General

  • Target

    31636d98b7165702e3bc2cd27ade00eddfc05edb4a7d4a5cc53c13da6ed0658a.exe

  • Size

    28KB

  • MD5

    99bb589848df9617aad19c224ab538b7

  • SHA1

    cc28b66727df82f2297e158012f94b8b18cdc360

  • SHA256

    31636d98b7165702e3bc2cd27ade00eddfc05edb4a7d4a5cc53c13da6ed0658a

  • SHA512

    cb025f43ed25b5209f125668dc443af56b72b6454f6d2b1dcac4947bd3c9d83ebf73e4bb7b147f149b5b64065470f69d5e53b936ccfa6e6c554eb9dca5c33fe6

  • SSDEEP

    768:uZ4FLz8ae+rOn8ae+rOHPRPq+BSBmBCUK9+BSBmBCUK1:uGIIHp1MkPMkU

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 (5264) 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\31636d98b7165702e3bc2cd27ade00eddfc05edb4a7d4a5cc53c13da6ed0658a.exe
    "C:\Users\Admin\AppData\Local\Temp\31636d98b7165702e3bc2cd27ade00eddfc05edb4a7d4a5cc53c13da6ed0658a.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:832

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-1153236273-2212388449-1493869963-1000\desktop.ini.tmp

          Filesize

          28KB

          MD5

          528a3278a1cdda12deb5bc2fdef6e7d1

          SHA1

          04673aaab703fbe71e21487bca9efcfcca331137

          SHA256

          e47d82bbbe32ca280971a4656e4e54cf0400e4b3ddbd367d98a848abf53f034f

          SHA512

          da3450e7fb9a136467d46f5b374ef02272ffff617ee76ec3b7d0b597a242144e56d62c6064b0c2b88e2391df5d58490c61d9cf3ec74a98b35026185531a96921

        • C:\f518c2ae32873fab6fcffcc19027\2010_x64.log.html.exe

          Filesize

          114KB

          MD5

          da096550df89421a7057690659702a45

          SHA1

          25a0d78ee336b1b16f7ef08fd18772c77d5107d0

          SHA256

          f9241c6afdc72d7cf559e348350158c1d8616f7f68aad1742e795a5c3a6e1e99

          SHA512

          f46a44498bfe036a4184b06ab0c1e4413b1b1dc2ab89ea802f90fa07ed21d918b50eb967d472b89b31eec784b36e9d70d87b5c6f42cb946cbf315ff4bd9ec85b

        • memory/832-797-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB