Analysis

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

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    28/07/2026, 22:53

General

  • Target
    2026-07-28_6412cbd05a514973c9b1d4ed7d5fc4e4_elex_wannacry.exe
  • Size 60KB
  • Sample260728-2t5dbabl81
  • SHA256 1860b20fad7a1dc55e97fb7311a0006ee8a55c9fa35f45ae50f4e704e194d8c7
  • 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++.

  • Renames multiple (4899) 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_6412cbd05a514973c9b1d4ed7d5fc4e4_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-28_6412cbd05a514973c9b1d4ed7d5fc4e4_elex_wannacry.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4800

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-3053180483-1881419501-3594244048-1000\desktop.ini.tmp
        • Size 60KB
        • SHA256 ea304396cbd8ed2c3db988701d24b6acd2309d956f2f0cfb26eef4ca5d375648
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7-zip.dll.tmp

        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 159KB
        • SHA256 bdbaaf3821723acab52bf4205a6b75fdaa920304bb0cc92756f9b2591bbf0bc6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/4800-0-0x0000000000400000-0x0000000000408000-memory.dmp

        memory/4800-568-0x0000000000400000-0x0000000000408000-memory.dmp