Analysis

  • max time kernel
    150s
  • max time network
    136s
  • 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, 07:23

General

  • Target

    c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe

  • Size

    21KB

  • MD5

    830487fd2d04c1c799597213fc60ce0c

  • SHA1

    7bee89bbcb3e8615ffadb7453d62c9f9c2806658

  • SHA256

    c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5

  • SHA512

    df0ea654b6a49e10940fe7b24e9121b23dee59daaeb56e9d2aecf0d27306a2fdb439ee6cb211608afc2b949150418222f15147a1116da0135a22e485526a321f

  • SSDEEP

    384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOb84sAsvosGOUiuJtfosGOUiuJtvqj:uZ4FLz8ae+rOn8ae+rOb83osGOUiuJtR

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 (5279) 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\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe
    "C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4920

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3920234085-916416549-2700794571-1000\desktop.ini.tmp

          Filesize

          22KB

          MD5

          851600b7e1bfc09270f44393dd091eb7

          SHA1

          d65f6edf46fe876c9d37f633dc8b0b4b1ceaa334

          SHA256

          536e3017fb0d6a34277c1afa102951524b8e9cec2c09f69385e695480b8c63c3

          SHA512

          2dd373084076bf6a36370b6547e074f3af4876f0fcb97794bde73e626b465b68fd50060a396912c5429eee777edad905a8c29f18813121ff6e0cfb9c2b7db6f0

        • C:\6eaadd5e1536cd09900c16de307910\2010_x86.log.html.tmp

          Filesize

          103KB

          MD5

          bde2d88e188dda6d0435c4aebd173125

          SHA1

          b5301ee0eda807882c2a85208e2ad32766680b71

          SHA256

          7a0a8593c1649be9387904c67f655f92122fd95f9abea612c0efd1883c6520ce

          SHA512

          cc67526074d607b5218365b69de5a6c177e3403fb615764e4311a136fda594fefcb48f7ec9df5d0a4b7f16a67f872de5cf5fc1934d237d7c1775268296837b20

        • memory/4920-803-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB