Analysis

  • max time kernel
    150s
  • max time network
    147s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    23/08/2026, 12:44

General

  • Target
    2026-08-22_0d59a432cedf00c27d5a45be5168bed6_elex_wannacry.exe
  • Size 26KB
  • Sample260823-pystvsxakb
  • SHA256 efa12228d8a8fc8e9ea17fb9beb2bfa01325a4de38dc2806765d5e18cffacc23
  • 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 (4883) 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\2026-08-22_0d59a432cedf00c27d5a45be5168bed6_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-22_0d59a432cedf00c27d5a45be5168bed6_elex_wannacry.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:5576

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-3797332335-34111092-3597280141-1000\desktop.ini.tmp
        • Size 26KB
        • SHA256 48b92d67ac0332ab2291c3a5a8d5558348b708512d84530ed2187a5283ffb474
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7-zip.dll.tmp

        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 125KB
        • SHA256 0a707c8c642db052a4482d9782052d05906e9f3556657de7033ebb2e5186fb45
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/5576-0-0x0000000000400000-0x0000000000409D5C-memory.dmp

        memory/5576-624-0x0000000000400000-0x0000000000409D5C-memory.dmp