Analysis

  • max time kernel
    83s
  • max time network
    139s
  • 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, 07:23

General

  • Target
    2026-07-01_de61fbf5069242d70804b4d9285a051a_elex_remcos_smoke-loader_stealc_stop_tofsee.exe
  • Size 1.4MB
  • Sample260701-h77aaagy7q
  • SHA256 42e6955274126b3fcc274958162f24b052d1f901dabda8bdeb17e1eb23abf45e
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • 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.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Drops file in System32 directory 3 IoCs
  • Drops file in Program Files directory 36 IoCs
  • Drops file in Windows directory 25 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks SCSI registry key(s) 3 TTPs 62 IoCs

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

  • Checks processor information in registry 2 TTPs 6 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies registry class 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 46 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of FindShellTrayWindow 50 IoCs
  • Suspicious use of SendNotifyMessage 41 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-07-01_de61fbf5069242d70804b4d9285a051a_elex_remcos_smoke-loader_stealc_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-01_de61fbf5069242d70804b4d9285a051a_elex_remcos_smoke-loader_stealc_stop_tofsee.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    PID:4184
  • C:\Users\Admin\AppData\Local\Temp\2026-07-01_de61fbf5069242d70804b4d9285a051a_elex_remcos_smoke-loader_stealc_stop_tofsee.exe
    C:\Users\Admin\AppData\Local\Temp\2026-07-01_de61fbf5069242d70804b4d9285a051a_elex_remcos_smoke-loader_stealc_stop_tofsee.exe
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    PID:4568
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:2212
    • 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:3360
  • 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:3600
  • 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:5896

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        Microsoftlibcef19.10.20064.310990.exe

        • Path C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\Microsoftlibcef19.10.20064.310990.exe
        • Size 8.8MB
        • SHA256 054ef0b2e6bb155d50fcff14e6d8d6fdfc7b1f53a80117aec2aef4818ddeedd6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        NPPDF32Adobe.exe

        • Path C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Browser\NPPDF32Adobe.exe
        • Size 1.4MB
        • SHA256 44d8352a4f0b4254e1a015d92062f6a46971d02e7dada3b474c414b4f5fdf316
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CreateAdobe.exe

        • Path C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Browser\WCChromeExtn\CreateAdobe.exe
        • Size 1.4MB
        • SHA256 40741cbf62292d70776158d7db35f6c778c54193aa5e9cb024db79826191effb
        • MD5 SHA1 SHA512 SSDEEP TLSH

        LogTransportPDFPrevHndlr.exe

        • Path C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\LogTransportPDFPrevHndlr.exe
        • Size 2.0MB
        • SHA256 7b08ca270fd1b233d9313b9c2c50ae7a80da6397b46c0aff19d8dd2534688cea
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ContractVisual10.0.60828.0.exe

        • Path C:\Program Files (x86)\Common Files\Microsoft Shared\VSTA\Pipeline.v10.0\Contracts\ContractVisual10.0.60828.0.exe
        • Size 1.4MB
        • SHA256 f9be6a3f476b1ad63edff2df525bdff7f15075677c5d85b9cfd584362ea33213
        • MD5 SHA1 SHA512 SSDEEP TLSH

        OperatingMicrosoft.exe

        • Path C:\Program Files (x86)\Windows NT\TableTextService\OperatingMicrosoft.exe
        • Size 1.4MB
        • SHA256 42e6955274126b3fcc274958162f24b052d1f901dabda8bdeb17e1eb23abf45e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        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

        resourcesWindows.exe

        • Path C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Microsoft.Security.ApplicationId.PolicyManagement.PolicyManager.Resources\v4.0_10.0.0.0_de_31bf3856ad364e35\resourcesWindows.exe
        • Size 1.4MB
        • SHA256 f00394284adcbcd79d48c7e921b53596dc39891e96b45cc45d104cf0dd74540d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/5896-137-0x0000014602EA0000-0x0000014602FA0000-memory.dmp

        memory/5896-184-0x0000014605EA0000-0x0000014605EC0000-memory.dmp

        memory/5896-153-0x0000014605B00000-0x0000014605C00000-memory.dmp

        memory/5896-170-0x0000014605920000-0x0000014605940000-memory.dmp

        memory/5896-151-0x00000146056C0000-0x00000146056E0000-memory.dmp