Overview

overview

10

Static

static

10

2026-07-02...er.exe

windows10-2004-x64

10

2026-07-02...er.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    143s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    02/07/2026, 16:07

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General

  • Target
    2026-07-02_f2fbf047f37fbf6013f887bb0f7414f1_elex_rhadamanthys_smoke-loader.exe
  • Size 284KB
  • Sample260702-tkwe2sht9s
  • SHA256 bdac53476c5fd2e1aea1ac60e5918c6fc02c81ac6621614bf72233acc87fabb3
  • 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 3 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.

  • 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
  • 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 1 IoCs
    adwarespyware
  • Modifies registry class 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 44 IoCs
  • Suspicious use of FindShellTrayWindow 53 IoCs
  • Suspicious use of SendNotifyMessage 39 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-07-02_f2fbf047f37fbf6013f887bb0f7414f1_elex_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-02_f2fbf047f37fbf6013f887bb0f7414f1_elex_rhadamanthys_smoke-loader.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:5448
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:5292
    • 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:5440
  • 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:4844
  • 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:4784

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        7z.exe
        • Path C:\Program Files\7-Zip\7z.exe
        • Size 329KB
        • SHA256 a298bd81eea066f65032cc7e7e398c607bfd85d827d26e09e16d6c2d66f6d489
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        chrome.exe
        • Path C:\Program Files\Google\Chrome\Application\chrome.exe
        • Size 284KB
        • SHA256 5f4e50f9831dc8f059608ff2a9a16de6d39552913e04e511815b09c9887e923d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        RCX5299.tmp
        • Path C:\Program Files\Java\jdk-1.8\bin\RCX5299.tmp
        • Size 284KB
        • SHA256 e2df369ac264fa9b04da56e956745f5f9134e1475f7aeb5506851feac4bf873e
        • 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/4784-429-0x00000247E6430000-0x00000247E6864000-memory.dmp
        Download

        memory/4844-268-0x000001BB801E0000-0x000001BB802E0000-memory.dmp
        Download

        memory/4844-316-0x000001BB94110000-0x000001BB94130000-memory.dmp
        Download

        memory/4844-297-0x000001BB83D10000-0x000001BB83D30000-memory.dmp
        Download

        memory/4844-284-0x000001BB93D90000-0x000001BB93E90000-memory.dmp
        Download

        memory/4844-283-0x000001BB83930000-0x000001BB83950000-memory.dmp
        Download

        memory/4844-267-0x000001BB801E0000-0x000001BB802E0000-memory.dmp
        Download

        memory/4844-266-0x000001BB801E0000-0x000001BB802E0000-memory.dmp
        Download