Overview

overview

10

Static

static

3

FCFA826B89...D2.exe

windows10-2004-x64

10

FCFA826B89...D2.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    FCFA826B899EE297DF49F4EF756857D2.exe
  • Size 45.8MB
  • Sample260822-b65azaea45
  • SHA256 2779033e8c0bd3d1c2332d1a4c498b09d2eb090fff10a5aad7adbfb3a5231d72
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
valleyrat_s2backdoordiscoverypersistenceupx

Malware Config

Extracted

Family

  • valleyrat_s2

Version

  • 1.0

C2

  • 156.247.41.9:668

  • 127.0.0.1:80

Attributes
  • campaign_date

    2026. 8.18

Targets

    • Target
      FCFA826B899EE297DF49F4EF756857D2.exe
    • Size 45.8MB
    • SHA256 2779033e8c0bd3d1c2332d1a4c498b09d2eb090fff10a5aad7adbfb3a5231d72
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    backdoordiscoveryvalleyrat_s2persistenceupx

    • Family: ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

      backdoorvalleyrat_s2

    • Sets service image path in registry

      This determines the executable launched when a service starts. It can be used to establish persistence.

      persistence

    • 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

    • Enumerates connected drives

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

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

      upx
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks