Overview

overview

10

Static

static

10

2026-06-27...er.exe

windows10-2004-x64

10

2026-06-27...er.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    123s
  • max time network
    148s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    29/06/2026, 04:25

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General

  • Target
    2026-06-27_a30f749de2e02390b78b17f44676b36b_elex_rhadamanthys_smoke-loader.exe
  • Size 1.5MB
  • Sample260629-e1646aes6p
  • SHA256 4b379f1ff2c5cc266e9380c45f8ffdbb73160241a70d7f8dd01000ce001ee31b
  • 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 28 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
  • 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\2026-06-27_a30f749de2e02390b78b17f44676b36b_elex_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-06-27_a30f749de2e02390b78b17f44676b36b_elex_rhadamanthys_smoke-loader.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:5668
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:5252
    • 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:3424
  • 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:1856
  • 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:4440

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 15e7c95a813e778f96cc3c3752cea1e7e9807eae708dacfd7fd8020d6825eaf3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        RCXCA44.tmp
        • Path C:\Program Files\Google\Chrome\Application\RCXCA44.tmp
        • Size 284KB
        • SHA256 e01ba81ace471ea2b6008c97f6800375c0d54db382e041ea34c12d6c9ca1d969
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        chrome.exe
        • Path C:\Program Files\Google\Chrome\Application\chrome.exe
        • Size 1.5MB
        • SHA256 5fa0be7a8ca899a4637367952da9f1e45f7749356c19abf4a93700f224e593ce
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        RCXCD1D.tmp
        • Path C:\Program Files\Java\jdk-1.8\bin\RCXCD1D.tmp
        • Size 284KB
        • SHA256 99940dfdab61cbe077d459d4b8c4b724e28e399a3c97c5834d190d4d53ae692f
        • 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 607B
        • SHA256 be6b74e52e5eef1f1c27c0976bf3bf1bfa99958c00bbef2898a602f691be6dae
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/1856-296-0x000002A982B50000-0x000002A982B70000-memory.dmp
        Download

        memory/1856-271-0x000002A9801E0000-0x000002A9802E0000-memory.dmp
        Download

        memory/1856-284-0x000002A982D50000-0x000002A982E50000-memory.dmp
        Download

        memory/1856-318-0x000002A994580000-0x000002A9945A0000-memory.dmp
        Download

        memory/1856-272-0x000002A9801E0000-0x000002A9802E0000-memory.dmp
        Download

        memory/1856-283-0x000002A982910000-0x000002A982930000-memory.dmp
        Download

        memory/1856-270-0x000002A9801E0000-0x000002A9802E0000-memory.dmp
        Download

        memory/3424-439-0x000000000E440000-0x000000000ECBB000-memory.dmp
        Download