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, 10:04

General

  • Target

    186222b5af4cbed7ad1e958567d7fd9fd200a653f83aee40aadc1dc70933fdc2.exe

  • Size

    34KB

  • MD5

    82ae0dc11840cf3e89e597856d8f5ee8

  • SHA1

    04f71d6c139ced0b09ff5ab1539f72e0b132652b

  • SHA256

    186222b5af4cbed7ad1e958567d7fd9fd200a653f83aee40aadc1dc70933fdc2

  • SHA512

    9b99aacfbe2f74425c98cb78ddd833fd60324e274f2dcd5fe5895f0d947c3f12b437eb03b8c5461b9ef191b5b7a2af2a29588bcdcc19e250ddd0628e57ea4f1b

  • SSDEEP

    384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOYE/AE/DZKNZKy7MwlwHnFn3:uZ4FLz8ae+rOn8ae+rOrZkZ/7M4anFn3

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 (5357) 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\186222b5af4cbed7ad1e958567d7fd9fd200a653f83aee40aadc1dc70933fdc2.exe
    "C:\Users\Admin\AppData\Local\Temp\186222b5af4cbed7ad1e958567d7fd9fd200a653f83aee40aadc1dc70933fdc2.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:864

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-330179853-1108322181-418488014-1000\desktop.ini.tmp

          Filesize

          34KB

          MD5

          777c9a326493cd28b8d830a7bad0a45a

          SHA1

          9fc17c618ec4e899a28097229fde0a7dc6059801

          SHA256

          4a606036f25d3618cc6fa587e291b050c44ca3a7e39c1787d8a52fcbed94974f

          SHA512

          7e3cff72294dd0956002849fc65c5689b22603f95bb6244656d10f46c170b1cd8b459d8facec88afee54b76e78661305d21efd1386dc5f205ffd7d514cd860a7

        • C:\b5678467481f56688dc2ce816954\2010_x86.log.html.tmp

          Filesize

          115KB

          MD5

          b71ca468135eb61df2a9ea89f1d9a06f

          SHA1

          7df7f10747041d08fe3bb60e5dcec18a37a2688e

          SHA256

          65a60a0ff14eeedcbd6f757182a0b08ac5cfabccfeb51eb13b83cfb55009f9f3

          SHA512

          1b69d8244e15aa1d51adf61df501ea0e2bf8b88cffc8ea16a23fb44daed4f44f35b6ba540b0e04a00d65122e046a0a727cc05cc63ec1ad43101a15c61a4d6b4e

        • memory/864-1221-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB