General

  • Target
    Hwdqiniweb.exe
  • Size 69.0MB
  • Sample260113-bxs7cady8b
  • SHA256 c2132d200b9d9e3ad33e27d2d1707b5bd3e5941f4fdb1a00555fedca59fe2c67
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • valleyrat_s2

Version
  • 1.0

C2
  • szhuandxiaomuma-yandi.com:4433

Attributes
  • campaign_date

    2026. 1.11

Targets

    • Target
      Hwdqiniweb.exe
    • Size 69.0MB
    • SHA256 c2132d200b9d9e3ad33e27d2d1707b5bd3e5941f4fdb1a00555fedca59fe2c67
    • MD5 SHA1 SHA512 SSDEEP
    • ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

    • Valleyrat_s2 family

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Executes dropped EXE

    • Loads dropped DLL

    • Checks whether UAC is enabled

    • Enumerates connected drives

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

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v16

Tasks