Overview

overview

10

Static

static

10

2026-07-28...ry.exe

windows10-2004-x64

10

2026-07-28...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
    28/07/2026, 23:23

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General

  • Target
    2026-07-28_24bbed74684d40b24f83a86caf3b7128_elex_wannacry.exe
  • Size 80KB
  • Sample260728-3c86lsce42
  • SHA256 f77b4330b10ed37d8a953f6fdb953315130f59ecb8fb5bafb81535e0c30d7519
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
discoverycosmupersistenceransomwareworm

Malware Config

Signatures

  • Family: Cosmu

    Cosmu is a Windows worm written in C++.

    wormcosmu
  • Detects Cosmu payload 2 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (4301) files with added filename extension

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

    ransomware
  • Sets service image path in registry 3 TTPs 1 IoCs

    This determines the executable launched when a service starts. It can be used to establish persistence.

    persistence
  • 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 behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-07-28_24bbed74684d40b24f83a86caf3b7128_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-28_24bbed74684d40b24f83a86caf3b7128_elex_wannacry.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1440
    • C:\Users\Admin\AppData\Local\Temp\_loader.exe
      "_loader.exe"
      2⤵
      • Sets service image path in registry
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: LoadsDriver
      • Suspicious use of AdjustPrivilegeToken
      PID:4232
    • 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:1140

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp
        • Path C:\$Recycle.Bin\S-1-5-21-3611646547-550105268-947503007-1000\desktop.ini.tmp
        • Size 69KB
        • SHA256 23da8e10a056111713a9b06f57f2cf03c16934fe1bca0da76813adf0f4bb4c6f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _loader.exe
        • Path C:\Users\Admin\AppData\Local\Temp\_loader.exe
        • Size 11KB
        • SHA256 a495a79d9640aa57b33850b0594b4477659fcb1aa754ce0f3867252a8966ba27
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Zombie.exe
        • Path C:\Windows\SysWOW64\Zombie.exe
        • Size 69KB
        • SHA256 24cdfb681cdf09f35556cc526fd14bc1cddf3cd9c552748afd2e7656dc69d5ea
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/4232-8-0x0000000000400000-0x0000000000405000-memory.dmp
        Download

        memory/4232-13-0x0000000000400000-0x0000000000405000-memory.dmp
        Download