Analysis

  • max time kernel
    149s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    10/09/2026, 03:40

General

  • Target
    2026-09-08_a4e0055812da2235fe7ca71e35d841b0_elex_wannacry.exe
  • Size 25KB
  • Sample260910-d8akgswdrc
  • SHA256 25b863e809d6060221c10be206da10ab2760ee4e221ab0e408e6c4de8ca31139
  • 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++.

  • Custom signature
    Detects executables packed with eXPressor 4 IoCs
  • Renames multiple (5122) 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\2026-09-08_a4e0055812da2235fe7ca71e35d841b0_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-09-08_a4e0055812da2235fe7ca71e35d841b0_elex_wannacry.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4320

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        desktop.ini.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-1074038928-2032447174-945360078-1000\desktop.ini.tmp
        • Size 25KB
        • SHA256 3bb0f7ec7596533851e9bcce565be7b2c649474df380606244f6907e906577eb
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7-zip.dll.tmp

        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 124KB
        • SHA256 041867210b382d1f33775bdb87a998adf8e02f09cc22c17e578a35ede39cfc78
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/4320-0-0x0000000000400000-0x0000000000409D5C-memory.dmp

        memory/4320-536-0x0000000000400000-0x0000000000409D5C-memory.dmp