Overview

overview

10

Static

static

10

2026-08-25...ry.exe

windows10-2004-x64

10

2026-08-25...ry.exe

windows11-ltsc_2024-x64

10

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
    26/08/2026, 00:50

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General

  • Target
    2026-08-25_fa7b0e9848a1f1ee0cd61fabf45867f2_amadey_elex_wannacry.exe
  • Size 114KB
  • Sample260826-a7eahafp5t
  • SHA256 6472132da58a8711844201456936159667e7bdf02466a7ad57dbcf5ff0752114
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
discoverycosmuransomwareworm

Malware Config

Signatures

  • Family: Cosmu

    Cosmu is a Windows worm written in C++.

    wormcosmu
  • Detects Cosmu payload 4 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (4395) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-25_fa7b0e9848a1f1ee0cd61fabf45867f2_amadey_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-25_fa7b0e9848a1f1ee0cd61fabf45867f2_amadey_elex_wannacry.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4616
    • C:\Users\Admin\AppData\Local\Temp\_Uninstall.exe
      "_Uninstall.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3448
    • C:\Windows\SysWOW64\Zombie.exe
      "C:\Windows\system32\Zombie.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      PID:484

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp
        • Path C:\$Recycle.Bin\S-1-5-21-4046655672-1449839301-2197395821-1000\desktop.ini.tmp
        • Size 100KB
        • SHA256 cd972a6f01cb19f381085a76d0362f5e7bdb0e5984267877e5438279cc159df6
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _Uninstall.exe
        • Path C:\Users\Admin\AppData\Local\Temp\_Uninstall.exe
        • Size 14KB
        • SHA256 6cd2baf18d885881e9d91fc8fc7a9062eeb2120b1efd852d2339cf8db9bc776f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Zombie.exe
        • Path C:\Windows\SysWOW64\Zombie.exe
        • Size 99KB
        • SHA256 3050af677fdb679644a385e275eeb3137e84d91d650d37b1bb0d392d00d737d6
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/4616-0-0x0000000000400000-0x0000000000408000-memory.dmp
        Download

        memory/4616-540-0x0000000000400000-0x0000000000408000-memory.dmp
        Download