General

  • Target
    Xerox_LoaderV1.bat
  • Size 2KB
  • Sample260709-cnbflsbx9m
  • SHA256 94895ba18bfb5b19b99c797fdf38974c616f7d4f56c4d9fbdbc650295c3118eb
  • MD5 SHA1 SHA512 TLSH

Malware Config

Extracted

Family
  • quasar

Attributes
  • encryption_key

    2CCA35A9746E4DCF1479747700C0450757A3737C

  • key_salt

    5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382

  • reconnect_delay

    3000

Targets

    • Target
      Xerox_LoaderV1.bat
    • Size 2KB
    • SHA256 94895ba18bfb5b19b99c797fdf38974c616f7d4f56c4d9fbdbc650295c3118eb
    • MD5 SHA1 SHA512 TLSH
    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Looks for VirtualBox Guest Additions in registry

    • Badlisted process makes network request

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

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Looks for VMWare Tools registry key

    • Executes dropped EXE

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Deobfuscate/Decode Files or Information

      Payload decoded via CertUtil.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v16

Tasks