Analysis

  • max time kernel
    150s
  • max time network
    97s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    19/05/2026, 02:35

General

  • Target
    2026-05-19_896a3af351d5b3e5a1830ef82b0327d7_elex_wannacry.exe
  • Size 1.7MB
  • Sample260519-c3eftaa18j
  • SHA256 96dbd579973fcd8f9348acce3cc95aa9f85767a9e7d0c25a2cc6454da9ae02f5
  • 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 (1702) 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\2026-05-19_896a3af351d5b3e5a1830ef82b0327d7_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-05-19_896a3af351d5b3e5a1830ef82b0327d7_elex_wannacry.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:792

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-2824035265-2271499813-2042964211-1000\desktop.ini.tmp
        • Size 1.7MB
        • SHA256 29ba17f2849aa3d4d85f9cdb6ee3ac190b00ef4aab25c66d7454fc6eca244ff8
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7-zip.dll.tmp

        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 1.8MB
        • SHA256 327ec0d2767d9b2e0e1040ff83e8f7c829e00b7524bd6bd9c198e3929c886e9d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/792-0-0x0000000000400000-0x0000000000409D5C-memory.dmp

        memory/792-286-0x0000000000400000-0x0000000000409D5C-memory.dmp