Analysis

  • max time kernel
    149s
  • max time network
    102s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250502-en
  • resource tags

    arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    29/05/2025, 11:58

General

  • Target

    31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe

  • Size

    79KB

  • MD5

    6a43f3c8567cca14b422a3fe1b3b5a07

  • SHA1

    a16d10ded5e5cb3781c6f066db83370603b986b7

  • SHA256

    31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a

  • SHA512

    40523062a4ccee23e61724967aa1139723ed3dc75ec97c9da9431fb77c82665d52aaad97f0dc4b5d87bbc0d7e219d2ddc90628e738ed1f7b6dd534da7774fc12

  • SSDEEP

    768:s7BlpppARFbhdLz8ae+rOn8ae+rOoJhiJhYueGJhzAEaSXmlOT:s7ZppApdIIoJhiJhYueBFJlOT

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 (5202) 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\31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe
    "C:\Users\Admin\AppData\Local\Temp\31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:5600

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-2117256398-1057710415-2142084777-1000\desktop.ini.tmp

          Filesize

          79KB

          MD5

          969fa20818599dc74aa596c0f4b46837

          SHA1

          3c6e37a3b5d5d1f4ddf1014dcd29de364038ff4b

          SHA256

          382b25162e4804b2ae3bbccb59d092b529d57d24120fcd332f8a8cadf357b8ba

          SHA512

          11e03255dc209165715a0a368872db6ef2f4dc6b4c9c77ce0b37f7a1b2a8cfabcac8d8d8a4396080e3dfa373b51b3218fc5c4704f789cd61bd3f9e2562bf444f

        • C:\c8b37a19c794785c97\2010_x86.log.html.tmp

          Filesize

          159KB

          MD5

          46e92cf454fdc4102242ed02aafdf0f9

          SHA1

          4abff0bffb6be64c5007e5c529b3089e9fd5c1eb

          SHA256

          9bb9823154c99af973776929db7ea63cb89adb4303d30ec6be29552b46902bc3

          SHA512

          f6cb6282da44e6993d64f8e2f5e23233e5973338e9d33d3f0c62540af7aae59cd3f8c3844a898b91b28d205f792a5e70289b716b91b5433aeb444b25bfa3d55b