Overview

overview

10

Static

static

10

2026-07-08...er.exe

windows10-2004-x64

10

2026-07-08...er.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260706-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/07/2026, 18:46

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General

  • Target
    2026-07-08_07019b6f4fe371c4426cb36dec402598_elex_rhadamanthys_smoke-loader.exe
  • Size 284KB
  • Sample260708-xepxvsfs3n
  • SHA256 1e0f6160f90683fdc800bcdaad946a22d23fc023c638196b3f73b5d0a8aaaabe
  • 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 4 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 32 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\2026-07-08_07019b6f4fe371c4426cb36dec402598_elex_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-08_07019b6f4fe371c4426cb36dec402598_elex_rhadamanthys_smoke-loader.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:1168
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:4780
    • 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:1772
  • 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:484
  • 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:4636

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        7z.exe
        • Path C:\Program Files\7-Zip\7z.exe
        • Size 331KB
        • SHA256 68819e12f7fc92bedc663cc4575942df1985ced591ec6a5bb9f3bfd278ecc198
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        RCXF849.tmp
        • Path C:\Program Files\Google\Chrome\Application\RCXF849.tmp
        • Size 284KB
        • SHA256 fcc42c1f6c519192335d3bda35dad6eb596500e1ed4c582c98693185e2512ca2
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        RCXFA76.tmp
        • Path C:\Program Files\Java\jdk-1.8\bin\RCXFA76.tmp
        • Size 284KB
        • SHA256 36ff355e01d676071f565d0c9d4f07b0528b2c9766d4e84399b89b63864ca31b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dotnet.exe
        • Path C:\Program Files\dotnet\dotnet.exe
        • Size 328KB
        • SHA256 039ef7fec83c161dcd2e67a3edf90773aabb79851033959390c8203c379e3274
        • 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/484-304-0x0000010586990000-0x00000105869B0000-memory.dmp
        Download

        memory/484-274-0x0000010582E70000-0x0000010582F70000-memory.dmp
        Download

        memory/484-273-0x0000010582E70000-0x0000010582F70000-memory.dmp
        Download

        memory/484-318-0x0000010596FB0000-0x0000010596FD0000-memory.dmp
        Download

        memory/484-280-0x0000010596B90000-0x0000010596C90000-memory.dmp
        Download

        memory/484-279-0x0000010586790000-0x00000105867B0000-memory.dmp
        Download

        memory/484-272-0x0000010582E70000-0x0000010582F70000-memory.dmp
        Download