Analysis

  • max time kernel
    150s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    04/11/2026, 14:09

General

  • Target
    2026-11-03_8e1887214ef3ca76f5e05bb86fe97382_elex_wannacry.exe
  • Size 76KB
  • Sample261104-rf5rtaxs5k
  • SHA256 82b7bed406fb160bffa698079186adc45278e1ad3436980b8b07c969651ca35f
  • 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 (5057) 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\2026-11-03_8e1887214ef3ca76f5e05bb86fe97382_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-11-03_8e1887214ef3ca76f5e05bb86fe97382_elex_wannacry.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:2500

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        desktop.ini.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-681733028-2344970462-962213935-1000\desktop.ini.tmp
        • Size 76KB
        • SHA256 474aac18a4a58a90871ce022f38829fd879d6cb061a2e04e1668f298f70e111a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7-zip.chm.tmp

        • Path C:\Program Files\7-Zip\7-zip.chm.tmp
        • Size 194KB
        • SHA256 9cbbe657c9c2a3ff1d51389e8919c5abe3f054643e17b8a7d927e556546cc1c4
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/2500-0-0x0000000000400000-0x000000000040A000-memory.dmp

        memory/2500-763-0x0000000000400000-0x000000000040A000-memory.dmp