Overview

overview

10

Static

static

5

Install_s9ri.exe

windows10-2004-x64

10

Install_s9ri.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    e6cc4d5dabc459e227ce7016ea5735a80f8cdf8d502c193470c033e3171f13d3
  • Size 279KB
  • Sample260727-src2lswthx
  • SHA256 e6cc4d5dabc459e227ce7016ea5735a80f8cdf8d502c193470c033e3171f13d3
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
valleyrat_s2backdoordefense_evasionexecutionpersistenceransomware

Malware Config

Extracted

Family

  • valleyrat_s2

Version

  • 1.0

C2

  • 47.242.198.248:5252

  • 47.242.198.248:80

Attributes
  • campaign_date

    2026. 7.21

Targets

    • Target
      Install_s9ri.exe
    • Size 347KB
    • SHA256 e93bfa7cc056600ca5f72727fc6c35f74318c0fe41d989af432efb179a03dd3e
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    backdoordefense_evasionexecutionvalleyrat_s2persistenceransomware

    • Detects ValleyRAT payload

    • Family: ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

      backdoorvalleyrat_s2

    • Looks for VirtualBox Guest Additions in registry

      defense_evasion

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

      execution

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Drops file in Drivers directory

    • Looks for VMWare Tools registry key

      defense_evasion

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Enumerates connected drives

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

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks