Overview

overview

10

Static

static

3

B33A668328...E3.exe

windows10-2004-x64

10

B33A668328...E3.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    B33A668328313F6843B1B8094BFAFFE3.exe
  • Size 4.1MB
  • Sample260804-1mnasahd35
  • SHA256 1d0b8f081975cc9dfb542c8da5d173c3a68a23531e83f07e86ccc706e56d76f3
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
valleyrat_s2backdoordiscoveryexecutioninstallerpersistence

Malware Config

Extracted

Family

  • valleyrat_s2

Version

  • 1.0

C2

  • 47.86.2.244:557

  • 47.86.2.244:558

  • 127.0.0.1:80

Attributes
  • campaign_date

    'Y#W726

Targets

    • Target
      B33A668328313F6843B1B8094BFAFFE3.exe
    • Size 4.1MB
    • SHA256 1d0b8f081975cc9dfb542c8da5d173c3a68a23531e83f07e86ccc706e56d76f3
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    backdoordiscoveryexecutionvalleyrat_s2installerpersistence

    • Family: ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

      backdoorvalleyrat_s2

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Checks installed software on the system

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

      discovery

    • Drops desktop.ini file(s)

    • 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