Analysis

  • max time kernel
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    01/06/2026, 08:27

General

  • Target
    2026-06-01_284aa3d87dc206c6d463b0a89ec011d1_elex_wannacry.exe
  • Size 25KB
  • Sample260601-kcmcqsft61
  • SHA256 206eca479a491637cab1623b5906b322c3b0ea414ab1a2d52188986177115c01
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Cosmu

    Cosmu is a Windows worm written in C++.

  • Detects Cosmu payload 4 IoCs

    Cosmu is a worm written in C++.

  • Detects executables packed with eXPressor 4 IoCs
  • Renames multiple (5330) 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\2026-06-01_284aa3d87dc206c6d463b0a89ec011d1_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-06-01_284aa3d87dc206c6d463b0a89ec011d1_elex_wannacry.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:5020

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        desktop.ini.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-2654269261-3199571979-4291878722-1000\desktop.ini.tmp
        • Size 25KB
        • SHA256 01ceb1de839f6466ad94c41aea86721a753cac3caa5c3a4b905462faaeb306b3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7-zip.dll.tmp

        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 124KB
        • SHA256 acb097d9c72bb97af12eae7e02fa16afbfc6f5125fb2804f142ad1a82afc7d35
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/5020-0-0x0000000000400000-0x000000000040A000-memory.dmp

        memory/5020-769-0x0000000000400000-0x000000000040A000-memory.dmp