Overview

overview

10

Static

static

5

人事異�...��.exe

windows10-2004-x64

10

人事異�...��.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    人事異動に伴う給与調整.zip
  • Size 696KB
  • Sample260902-brmglsej3w
  • SHA256 189dfe0391bf344a5aa838017cabb044d69c16b490288b1c38900cf0165b0b9f
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
valleyrat_s2backdoordiscoveryexecutionpersistence

Malware Config

Extracted

Family

  • valleyrat_s2

Version

  • 1.0

C2

  • 204.194.50.231:449

  • 204.194.50.231:443

Targets

    • Target
      人事異動に伴う給与調整.exe
    • Size 72KB
    • SHA256 da169efdf43f4f2e87937efaaaf328dd659e28740411d1904a5bd0908ea5e061
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    backdoordiscoveryexecutionvalleyrat_s2persistence

    • Detects ValleyRAT payload

    • Family: ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

      backdoorvalleyrat_s2

    • 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.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks