Analysis

  • max time kernel
    150s
  • max time network
    138s
  • 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, 08:18

General

  • Target

    3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe

  • Size

    59KB

  • MD5

    915d7e5bf1043235648b85fb6f14a09e

  • SHA1

    db3d3355b64a6341619ca5a53ab8af7b7c3e0769

  • SHA256

    3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82

  • SHA512

    1b3df3669d9a340aba2526ac8202d9cb3472ba049042fa6460e9ff093bdee59d4e33cfd0eb70181802f2d6a3b999370a0bc7462e87389e29fd1106465d51dc0b

  • SSDEEP

    768:s7BlpppARFbhdLz8ae+rOn8ae+rOCjQjyZLhs8+R6+DF7QWdTTOYqV7:s7ZppApdIICjQjyZNs8+R6+DF7nOF7

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 (5047) 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\3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe
    "C:\Users\Admin\AppData\Local\Temp\3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:1244

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3623617754-4043701611-775564599-1000\desktop.ini.tmp

          Filesize

          59KB

          MD5

          9f85a90dab8278849d2e8b6ba7b464c3

          SHA1

          1ef8111001c2b5546714fe5aab937fe81944f0fc

          SHA256

          50476bf3efb60a4b37f68909efdafe310c0bb8fdcf3585d0b2ff5f109681f56f

          SHA512

          706c9aa46883bf3034e6d823c4c9682463aa4734145e147993109f36dac77a320ebb3a0a76788ece7ad594dad187bd9006287b3f376d88153e35004ce7e8afe2

        • C:\b96a7bef2438b67e1aee\2010_x86.log.html.tmp

          Filesize

          140KB

          MD5

          929d1db62a8da09b40bdd5f45b310eb5

          SHA1

          e4c5ff0253b48275ee0c99d8ee4ab338d8f7d6f6

          SHA256

          00f681e4b994f2e05b1f1254882d74fcb45ba6bffa23601c0aadbfa4c19f37e2

          SHA512

          d8f6cb6cf1430fc7662f41d3e0722bb1b6cadd1a1de75d0a82ea263e58e462285b0532741eab8b228d099d6a66306328377e05b8ea2bbca236a287e5ec23767e