Overview

overview

10

Static

static

10

2026-08-08...ry.exe

windows10-2004-x64

10

2026-08-08...ry.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    08/08/2026, 11:29

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General

  • Target
    2026-08-08_c83b4d112e473901339570b0cfb311d2_elex_wannacry.exe
  • Size 660KB
  • Sample260808-nl2essel8t
  • SHA256 ef526d1e3036dab2126fcf6df3f15414f6d46fd0890b36bbaa8220420221eb63
  • 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++.

  • Detects executables packed with eXPressor 4 IoCs
  • Renames multiple (2664) files with added filename extension

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

    ransomware
  • 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.

    discovery

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-08_c83b4d112e473901339570b0cfb311d2_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-08_c83b4d112e473901339570b0cfb311d2_elex_wannacry.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:1700

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp
        • Path C:\$Recycle.Bin\S-1-5-21-876885714-46325919-1482798410-1000\desktop.ini.tmp
        • Size 660KB
        • SHA256 f5b9d27603fdb5a1f183eff22298cb6b4139450cb4bd8168563c45a6e374355e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        7-zip.dll.tmp
        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 759KB
        • SHA256 9fd3a63db9ec96b86e0aa879bad4f995ab51f6e4a9c6c4f3b925e3c5918b4446
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1700-0-0x0000000000400000-0x000000000040A000-memory.dmp
        Download

        memory/1700-415-0x0000000000400000-0x000000000040A000-memory.dmp
        Download