Analysis

  • max time kernel
    150s
  • max time network
    95s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    03/05/2026, 15:53

General

  • Target
    2026-05-03_adf9c10c54638eb9dc8fd6fb31d48ef4_elex_wannacry.exe
  • Size 596KB
  • Sample260503-tb268scy21
  • SHA256 724121bdb200224b01eee4d138c655464deb4aaabe442159e2c3d033b50224a2
  • 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 (3250) 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\2026-05-03_adf9c10c54638eb9dc8fd6fb31d48ef4_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-05-03_adf9c10c54638eb9dc8fd6fb31d48ef4_elex_wannacry.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:2180

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        desktop.ini.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-2122505878-652277452-2375749442-1000\desktop.ini.tmp
        • Size 596KB
        • SHA256 e006fabb2d69080b5b81d3f603cb08ac8d91a5d6f7de1240b18e1f4961944c50
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7-zip.dll.tmp

        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 695KB
        • SHA256 a1310eb97bd2e0c49d2da36d1c10bf06f69ba7f7a749d0395edd71279cfcd09d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/2180-0-0x0000000000400000-0x0000000000409D5C-memory.dmp

        memory/2180-433-0x0000000000400000-0x0000000000409D5C-memory.dmp

        memory/2180-434-0x00000000021A0000-0x000000000225B000-memory.dmp