Overview

overview

10

Static

static

10

2026-07-06...er.exe

windows10-2004-x64

10

2026-07-06...er.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    121s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260706-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    07/07/2026, 01:58

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General

  • Target
    2026-07-06_9de9123da8c64a10097423728ce230c6_elex_rhadamanthys_smoke-loader.exe
  • Size 292KB
  • Sample260707-cea4gsfx6x
  • SHA256 8b76c768e1fde846a146b81da3d7c3eac6dd8c8024c54383d50533bc28803f48
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
adwarediscoverycosmupersistenceransomwarespywareworm

Malware Config

Signatures

  • Family: Cosmu

    Cosmu is a Windows worm written in C++.

    wormcosmu
  • Detects Cosmu payload 6 IoCs

    Cosmu is a worm written in C++.

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Enumerates connected drives 3 TTPs 12 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 2 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
  • Checks SCSI registry key(s) 3 TTPs 62 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 3 IoCs
    adwarespyware
  • Modifies registry class 35 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 32 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 40 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-07-06_9de9123da8c64a10097423728ce230c6_elex_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-06_9de9123da8c64a10097423728ce230c6_elex_rhadamanthys_smoke-loader.exe"
    1⤵
    • Enumerates connected drives
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies Internet Explorer settings
    PID:5940
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:5820
    • C:\Windows\explorer.exe
      explorer.exe /LOADSAVEDWINDOWS
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:2720
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:4396
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2620

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        7z.exe
        • Path C:\Program Files\7-Zip\7z.exe
        • Size 328KB
        • SHA256 2c0d197c5037babbb77101194fe768564384fad7fd6b8a8d2ca21ef577247b06
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        RCX28F3.tmp
        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\RCX28F3.tmp
        • Size 284KB
        • SHA256 f875b90d9aa3671e0b7ef1380640fb528353a72809734235a8cbbb613bee2f85
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        chrmstp.exe
        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\chrmstp.exe
        • Size 1.5MB
        • SHA256 938af45171a9e57b25c8655b8b11b56b734b02b4b1acfd8165e4c1fce31a7847
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        chrome_pwa_launcher.exe
        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\chrome_pwa_launcher.exe
        • Size 1.5MB
        • SHA256 60910bc9579cdad30b693dc9c7d7f683329688253405290d4909a7e053a581fe
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        RCX27C5.tmp
        • Path C:\Program Files\Google\Chrome\Application\RCX27C5.tmp
        • Size 284KB
        • SHA256 416e7ba8e3a3f7df89dbf2219137b6860c2836c31d48e941d2eb22d1ed7de4ab
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        default-browser-agent.exe
        • Path C:\Program Files\Mozilla Firefox\default-browser-agent.exe
        • Size 284KB
        • SHA256 99ba2ecf0c67f65ce4f6335d256e267e30bff9dd89c1af91d02032eb90c983aa
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        prep_Activatable Class_Hermes_perf.cache
        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
        • Size 599B
        • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/2620-429-0x000001C286440000-0x000001C286874000-memory.dmp
        Download

        memory/4396-274-0x000002FD001E0000-0x000002FD002E0000-memory.dmp
        Download

        memory/4396-280-0x000002FD01910000-0x000002FD01930000-memory.dmp
        Download

        memory/4396-286-0x000002FD01B70000-0x000002FD01B90000-memory.dmp
        Download

        memory/4396-281-0x000002FD01D50000-0x000002FD01E50000-memory.dmp
        Download

        memory/4396-317-0x000002FD146F0000-0x000002FD14710000-memory.dmp
        Download