Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    29/07/2026, 01:54

General

  • Target
    2026-07-28_01aab3e59e82b23596b9d8a5f42f600c_elex_wannacry.exe
  • Size 96KB
  • Sample260729-cb3pbsep2v
  • SHA256 d1e4a5d87d26c8d95c5ae664ea691d13985e84e585d858ce4ee462b8e5ddd56f
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Cosmu

    Cosmu is a Windows worm written in C++.

  • Detects Cosmu payload 2 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (4872) 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\2026-07-28_01aab3e59e82b23596b9d8a5f42f600c_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-28_01aab3e59e82b23596b9d8a5f42f600c_elex_wannacry.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:2372

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-889581200-2041691093-2048517887-1000\desktop.ini.tmp
        • Size 97KB
        • SHA256 8495fa6f229c55af45e1e694e4546f3f128ac9a7070cfcd575d3e6471efc3055
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7-zip.dll.tmp

        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 195KB
        • SHA256 8a842dc387062b59689a42af0a28d1a22009fcc677ac8786b2a232d8ae007a56
        • MD5 SHA1 SHA512 SSDEEP TLSH