General

  • Target
    26944aed6dfc2c25f96bbca49925fcaf.zip
  • Size 1.9MB
  • Sample210910-cgfrracbel
  • SHA256 e81ccda9157a84d16d15cef0418c8ffc0839cea2cfd669bccf08198d5929ff25
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • rustybuer

C2
  • https://awmelisers.com/

Targets

    • Target
      26944aed6dfc2c25f96bbca49925fcaf
    • Size 3.9MB
    • SHA256 64dd547546394e1d431a25a671892c7aca9cf57ed0733a7435028792ad42f4a7
    • MD5 SHA1 SHA512
    • Modifies system executable filetype association

    • Registers COM server for autorun

    • RustyBuer

      RustyBuer is a new variant of Buer loader written in Rust.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • 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

MITRE ATT&CK Enterprise v6

Tasks