Overview

overview

6

Static

static

3

rapid/Micr...es.dll

windows10-2004-x64

4

rapid/Micr...es.dll

windows11-ltsc_2024-x64

6

rapid/Syst...ic.dll

windows10-2004-x64

1

rapid/Syst...ic.dll

windows11-ltsc_2024-x64

1

rapid/Syst...ns.dll

windows10-2004-x64

1

rapid/Syst...ns.dll

windows11-ltsc_2024-x64

rapid/Syst...es.dll

windows10-2004-x64

1

rapid/Syst...es.dll

windows11-ltsc_2024-x64

rapid/Syst...le.dll

windows10-2004-x64

1

rapid/Syst...le.dll

windows11-ltsc_2024-x64

1

rapid/Syst...ss.dll

windows10-2004-x64

1

rapid/Syst...ss.dll

windows11-ltsc_2024-x64

1

rapid/System.Linq.dll

windows10-2004-x64

1

rapid/System.Linq.dll

windows11-ltsc_2024-x64

6

rapid/Syst...ry.dll

windows10-2004-x64

1

rapid/Syst...ry.dll

windows11-ltsc_2024-x64

1

rapid/Syst...ib.dll

windows10-2004-x64

1

rapid/Syst...ib.dll

windows11-ltsc_2024-x64

1

rapid/Syst...es.dll

windows10-2004-x64

1

rapid/Syst...es.dll

windows11-ltsc_2024-x64

1

rapid/Syst...me.dll

windows10-2004-x64

1

rapid/Syst...me.dll

windows11-ltsc_2024-x64

1

rapid/Syst...ns.dll

windows10-2004-x64

1

rapid/Syst...ns.dll

windows11-ltsc_2024-x64

1

rapid/Syst...ad.dll

windows10-2004-x64

1

rapid/Syst...ad.dll

windows11-ltsc_2024-x64

rapid/Syst...ng.dll

windows10-2004-x64

1

rapid/Syst...ng.dll

windows11-ltsc_2024-x64

rapid/WinU...er.exe

windows10-2004-x64

1

rapid/WinU...er.exe

windows11-ltsc_2024-x64

1

rapid/clrjit.dll

windows10-2004-x64

1

rapid/clrjit.dll

windows11-ltsc_2024-x64

6

Analysis

  • max time kernel
    111s
  • max time network
    121s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260618-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260618-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    29/06/2026, 12:12

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General

  • Target
    rapid/System.Linq.dll
  • Size 525KB
  • Sample260629-pc8cesew3k
  • SHA256 eb5c46edcafdfbb7fa4d4c47d9510ad4bb22309a786e75153de634020d380d65
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
6/10
adwarepersistenceransomwarespyware

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.

    persistence
  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • 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 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

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\rapid\System.Linq.dll,#1
    1⤵
      PID:1492
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2500
      • 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:4376
    • 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:3140
    • 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:1588

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          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/1588-179-0x0000027A3F260000-0x0000027A3F8F1000-memory.dmp
          Download

          memory/3140-17-0x000001F5801E0000-0x000001F5802E0000-memory.dmp
          Download

          memory/3140-35-0x000001F581DF0000-0x000001F581E10000-memory.dmp
          Download

          memory/3140-28-0x000001F581A50000-0x000001F581A70000-memory.dmp
          Download

          memory/3140-29-0x000001F581E70000-0x000001F581F70000-memory.dmp
          Download

          memory/3140-61-0x000001F5842B0000-0x000001F5842D0000-memory.dmp
          Download