Overview

overview

10

Static

static

5

Discount l...0a.iso

windows10-2004-x64

10

Discount l...0a.iso

windows11-ltsc_2024-x64

3

Sharing

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General

  • Target
    Discount list and amount discount_400a.iso
  • Size 792KB
  • Sample261030-jnvmtaxtax
  • SHA256 f9310bbcfec880bbfa7cd1ffaf2cfc62dc6c070b68d0005e830cb9e11874aa24
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
valleyrat_s2backdoordefense_evasiondiscoveryexecutionpersistenceprivilege_escalationransomware

Malware Config

Extracted

Family

  • valleyrat_s2

Version

  • 1.0

C2

  • 47.76.170.135:443

Targets

    • Target
      Discount list and amount discount_400a.iso
    • Size 792KB
    • SHA256 f9310bbcfec880bbfa7cd1ffaf2cfc62dc6c070b68d0005e830cb9e11874aa24
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    backdoordefense_evasiondiscoveryexecutionvalleyrat_s2persistenceprivilege_escalationransomware

    • Family: ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

      backdoorvalleyrat_s2

    • Command and Scripting Interpreter: PowerShell

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

      execution

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

      persistence

    • Enumerates connected drives

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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks