Analysis

  • max time kernel
    149s
  • 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, 11:58

General

  • Target

    65349d39466a2429eb00219c14c4458691f35198423b5e6ee268eaeefb2e0c52.exe

  • Size

    100KB

  • MD5

    01cdf80c07c90c2552680fefa2f96ca9

  • SHA1

    1106093e1e75637dee381dbf92dd5ff659101dfa

  • SHA256

    65349d39466a2429eb00219c14c4458691f35198423b5e6ee268eaeefb2e0c52

  • SHA512

    f8af356360c719884aa4e6d7e5fb727a10a5e2f1fb6643e5020f927867b5a9eac76f7d390d3872bfd759a2f805d2dc6345fa19258939e47e00c42668de0d9ea5

  • SSDEEP

    3072:spWpW+ocbmMSIBSFHQi8bLRCw/UnElCD+kffteA05afFk/cs2/w+0Yomxgr42v1J:Ngynx

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 (4839) 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\65349d39466a2429eb00219c14c4458691f35198423b5e6ee268eaeefb2e0c52.exe
    "C:\Users\Admin\AppData\Local\Temp\65349d39466a2429eb00219c14c4458691f35198423b5e6ee268eaeefb2e0c52.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:5764

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-2930597513-779029253-718817275-1000\desktop.ini.tmp

          Filesize

          100KB

          MD5

          525c7210e41d12f93150a23cba336bc0

          SHA1

          cfc27b79b5f38e1f75dba9d4bce9a1953b165ca5

          SHA256

          f05c9246dc809a7a1e0d7aab3ffc3079bcb154b8c3b95feaf6950eead92c8179

          SHA512

          efadbba0abebe80d5a8d62e2509b6ac259c3fac04082f9e7f6310b861bc98bfb9c6cdb0905be3015218ff5840c46a7ec2562c56b16535c3690dcc9dc7e9eed21

        • C:\6479eedf55783993fe56765264\2010_x86.log.html.tmp

          Filesize

          181KB

          MD5

          19bef3ecc2afc72fc919a9410bdc2c17

          SHA1

          2269faa31c0b323db620031cd2edfe5bdde278a2

          SHA256

          8ba8e187f2e47ee8da7dc8158237c23956ad21368099d9490f96c98e1b81f975

          SHA512

          76a542dbd3840fee67acf487ed9391ca720ce8ba07634cf1d06f561cbbd05e87a9378145a0b306587af97d02538d3bcfef9768b30bd4c7a36f341e1c89ba9163