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
    148s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    29/07/2026, 01:47

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General

  • Target
    2026-07-28_1552ad1a0d2640ebbbb96406a29a012b_elex_wannacry.exe
  • Size 320KB
  • Sample260729-b7j2esde34
  • SHA256 4c0fa63f3f547e604eb6fdec4a638ae08d3279295366d7ca673756ed8cb8bc51
  • 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 2 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (4279) 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\2026-07-28_1552ad1a0d2640ebbbb96406a29a012b_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-28_1552ad1a0d2640ebbbb96406a29a012b_elex_wannacry.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3372
    • 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:4340
    • C:\Users\Admin\AppData\Local\Temp\_zynap_service.exe
      "_zynap_service.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:4188

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        desktop.ini.tmp
        • Path C:\$Recycle.Bin\S-1-5-21-1875162379-3804078649-638427191-1000\desktop.ini.tmp
        • Size 95KB
        • SHA256 eed868c850468e9679eb821a52ace96ac47f170dc0ae9a0a33f21cdbc27e857d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _zynap_service.exe
        • Path C:\Users\Admin\AppData\Local\Temp\_zynap_service.exe
        • Size 225KB
        • SHA256 4196836930ca8fede9b73a776799612a9355a954f8846f8246d615a8b0d76da6
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Zombie.exe
        • Path C:\Windows\SysWOW64\Zombie.exe
        • Size 95KB
        • SHA256 29ddc4d4ed55a0ea0845dec3b994283687776a3dae69e84255a22a4f5f06cdaa
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/4188-21-0x00000000005A0000-0x00000000005DA000-memory.dmp
        Download