Analysis

  • max time kernel
    150s
  • max time network
    93s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    10/05/2026, 21:35

General

  • Target
    2026-05-10_2039536ea2ae18e0fca774e6687b5e3b_elex_wannacry.exe
  • Size 824KB
  • Sample260510-1feease151
  • SHA256 b8f5b869c21fad4200c8e1e1dc59f024405c1862f959a09e357a8bf88cd80265
  • 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 (2529) 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\2026-05-10_2039536ea2ae18e0fca774e6687b5e3b_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-05-10_2039536ea2ae18e0fca774e6687b5e3b_elex_wannacry.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4884

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-2122505878-652277452-2375749442-1000\desktop.ini.tmp
        • Size 824KB
        • SHA256 aa4341d1a23c0a7316c36edc3b5a5996616fabe2748aec76f757cd07a3825e04
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7-zip.dll.tmp

        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 923KB
        • SHA256 0e15ff6ee10ba8669d251676eced8d9471d6b25c2ff264f429f8a16606e938e0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/4884-0-0x0000000000400000-0x000000000040A000-memory.dmp

        memory/4884-409-0x0000000000400000-0x000000000040A000-memory.dmp

        memory/4884-410-0x0000000002150000-0x00000000021EC000-memory.dmp