Overview

overview

10

Static

static

10

2026-06-30...er.exe

windows10-2004-x64

10

2026-06-30...er.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    124s
  • 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
    01/07/2026, 03:20

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General

  • Target
    2026-06-30_af36a4109695e2c96a6b23546e6968ec_elex_rhadamanthys_smoke-loader.exe
  • Size 1.5MB
  • Sample260701-dvrxlsfs81
  • SHA256 ac7d3fb3ad8203cb33a6a70e7ac82e097ac8136b8c46ee77c5c0b80104bad9c8
  • 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 36 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\2026-06-30_af36a4109695e2c96a6b23546e6968ec_elex_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-06-30_af36a4109695e2c96a6b23546e6968ec_elex_rhadamanthys_smoke-loader.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:2988
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:3020
    • 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:5992
  • 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:4604
  • 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
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:4320

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          7z.exe
          • Path C:\Program Files\7-Zip\7z.exe
          • Size 322KB
          • SHA256 67c51e894d6bfd2db27268c3e35e156759dbf3fc45f82d40e10c4d48e642411f
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          RCXB758.tmp
          • Path C:\Program Files\Google\Chrome\Application\RCXB758.tmp
          • Size 284KB
          • SHA256 50575677483d30af06f810983b51b6df777798b93c2f517c50fb7dc89cb2cb03
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          RCXB8AA.tmp
          • Path C:\Program Files\Java\jdk-1.8\bin\RCXB8AA.tmp
          • Size 284KB
          • SHA256 41d6899fad279d9b1014132aaf68aab6b0597feed0b1cec10602e0f0350cd357
          • 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 603B
          • SHA256 76051c7134ef5b2b172ae67cc7317ea11daedcc3d11f55c52922e505f501568b
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          memory/4604-318-0x000001FC95710000-0x000001FC95730000-memory.dmp
          Download

          memory/4604-304-0x000001FC83B90000-0x000001FC83BB0000-memory.dmp
          Download

          memory/4604-285-0x000001FC93D90000-0x000001FC93E90000-memory.dmp
          Download

          memory/4604-284-0x000001FC83950000-0x000001FC83970000-memory.dmp
          Download

          memory/4604-273-0x000001FC801E0000-0x000001FC802E0000-memory.dmp
          Download

          memory/4604-274-0x000001FC801E0000-0x000001FC802E0000-memory.dmp
          Download

          memory/4604-272-0x000001FC801E0000-0x000001FC802E0000-memory.dmp
          Download