Overview

overview

10

Static

static

3

b2d18d22f1...ca.exe

windows10-2004-x64

10

b2d18d22f1...ca.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    152s
  • 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, 11:40

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General

  • Target
    b2d18d22f1aff68fc7fc03c56afa5c1be8fbd93d2f4ca.exe
  • Size 74KB
  • Sample260708-ns4thae14v
  • SHA256 b2d18d22f1aff68fc7fc03c56afa5c1be8fbd93d2f4caad1bff7dfec761b50f5
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
adwarebackdoorvalleyrat_s2persistenceransomwarespyware

Malware Config

Extracted

Family

  • valleyrat_s2

Version

  • 1.0

C2

  • 43.157.212.233:443

  • 43.157.212.233:442

  • 43.157.212.233:80

Attributes
  • campaign_date

    2026. 5.29

Signatures

  • Family: ValleyRat

    ValleyRat stage2 is a backdoor written in C++.

    backdoorvalleyrat_s2
  • Detects ValleyRAT payload 7 IoCs
  • 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 24 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 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 40 IoCs
  • Suspicious use of SetWindowsHookEx 4 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\b2d18d22f1aff68fc7fc03c56afa5c1be8fbd93d2f4ca.exe
    "C:\Users\Admin\AppData\Local\Temp\b2d18d22f1aff68fc7fc03c56afa5c1be8fbd93d2f4ca.exe"
    1⤵
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    PID:4528
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:2016
    • 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 use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:2376
  • 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:5660
  • 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:2940

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 599B
        • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/4528-9-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-22-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-4-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-5-0x00007FF6AED90000-0x00007FF6AEDAC000-memory.dmp
        Download

        memory/4528-6-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-7-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-0-0x000001AD3AE60000-0x000001AD3AE61000-memory.dmp
        Download

        memory/4528-10-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-11-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-12-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-13-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-17-0x00007FF6AED90000-0x00007FF6AEDAC000-memory.dmp
        Download

        memory/4528-3-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-136-0x000001AD3CEA0000-0x000001AD3CEEE000-memory.dmp
        Download

        memory/4528-15-0x000001AD3CEA0000-0x000001AD3CEEE000-memory.dmp
        Download

        memory/4528-18-0x000001AD3CEA0000-0x000001AD3CEEE000-memory.dmp
        Download

        memory/4528-19-0x000001AD3CEA0000-0x000001AD3CEEE000-memory.dmp
        Download

        memory/4528-20-0x000001AD3CEA0000-0x000001AD3CEEE000-memory.dmp
        Download

        memory/4528-21-0x000001AD3B080000-0x000001AD3B0A9000-memory.dmp
        Download

        memory/4528-14-0x000001AD3CE50000-0x000001AD3CE97000-memory.dmp
        Download

        memory/4528-2-0x000001AD3B110000-0x000001AD3B191000-memory.dmp
        Download

        memory/4528-16-0x000001AD3CEA0000-0x000001AD3CEEE000-memory.dmp
        Download

        memory/5660-77-0x0000021314710000-0x0000021314730000-memory.dmp
        Download

        memory/5660-51-0x0000021303A30000-0x0000021303A50000-memory.dmp
        Download

        memory/5660-43-0x00000213001E0000-0x00000213002E0000-memory.dmp
        Download

        memory/5660-52-0x0000021313E90000-0x0000021313F90000-memory.dmp
        Download

        memory/5660-58-0x0000021303C90000-0x0000021303CB0000-memory.dmp
        Download