Analysis

  • max time kernel
    150s
  • max time network
    139s
  • 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, 08:15

General

  • Target

    c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe

  • Size

    24KB

  • MD5

    cd3f0a72b25ff0c8433d823d6bb6bfa8

  • SHA1

    692da6dfe5594c29394ef862b7a90c9db3a6c2a7

  • SHA256

    c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567

  • SHA512

    dfd9bbf1da81e3d7ef2f06915172ba869d7a9ffcd5a535ea7e8b5d7445a8d07ccff5a718adf9983a9a42570227dc4d7d4ac03484770f4086195a95b6d4d4ea08

  • SSDEEP

    384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOIW2JhuC2JhuOxAxovAJOSAJOR:uZ4FLz8ae+rOn8ae+rOoJhiJh3AJLAJs

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 (5294) 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\c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe
    "C:\Users\Admin\AppData\Local\Temp\c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:3604

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-343936533-1262634978-1863872812-1000\desktop.ini.tmp

          Filesize

          24KB

          MD5

          b8b1585f1780b126434140353bda7a5c

          SHA1

          02851ca17a0d85bd9ff39d92907ff3053a6a6163

          SHA256

          4951bd9557d1e2459c9f8bb3d994eebbd9674bb2a7a683a42181e9f35ee0909e

          SHA512

          f59d9bd02d0832894c8b183762e50428cd8d3343488c3120744f469d39ee68e045370ae06bde2a53ea757c4e22072fc7d2685a2e99741c8be5c5f74b778817c5

        • C:\f21fae8705b262c53286e8\2010_x86.log.html.tmp

          Filesize

          105KB

          MD5

          7e171def1b4dab9a8dc130ae2aa27c73

          SHA1

          d7475ee7db05e9e0d1d688045cee3222d8643fea

          SHA256

          3aee13d099da089d27e9a5724b13449970b70f70ced7824a7304b61cbdc1c7f9

          SHA512

          0e310096c5e1e3560c891c0286d83a0080cfbf41fe554b2059f5deb9dff7000479505dc36e2bee6fc0e503fc3cf625964cf83e03059924ae714f36e2318f2ede

        • memory/3604-807-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB