Free IOC and YARA Scanner
Meet our fast and flexible multi-platform IOC and YARA scanner THOR in a reduced free version named THOR Lite.
Looking for a convinient way of using THOR Lite on multiple systems? Try our newest product THOR Cloud Lite! – Learn More

Meet our new fast and flexible multi-platform IOC and YARA scanner THOR in a reduced free version named THOR Lite.

THOR Lite includes the file system and process scan module as well as module that extracts “autoruns” information on the different platforms.

While our enterprise scanner THOR uses VALHALLA‘s big YARA rule base, the free THOR Lite version ships with the Open Source signature base, which is also part of our free Python scanner LOKI.

  • Free scanner for Windows, Linux and macOS
  • Precompiled and encrypted open source signature set
  • Update utility to download tested versions with signature updates
  • Documentation
  • Option add your custom IOCs and signatures
  • Different output formats: text log, SYSLOG (udp/tcp/tcp+tls), JSON to file, JSON via Syslog
  • Scan throttling to limit the CPU usage



Meet our new Go based scanner with improved performance


We offer pre-compiled program and signature packs for Windows (32/64 bit), Linux (32/64 bit) and macOS (64 bit)


THOR Lite is a limited version of our scanner THOR and offered for free. All we ask for is a Newsletter subscription.

What are the main differences to LOKI?

  • THOR Lite isn’t open source but precompiled for all major platforms
  • It is faster
  • It supports more output types: SYSLOG via udp/tcp, JSON via udp/tcp, SYSLOG format to file, JSON to file
  • It includes LOKIs signature-base in an encrypted form (no AV matches on clear-text signatures)
  • It allows custom encrypted signatures
  • It allows throttling by settings a maximum CPU usage
  • Its written in Go (not Python)

It does not include all checks performed by LOKI yet, but integrates other features and open source projects, like the “go-autoruns” module, written by Claudio Guarnieri.

Not Included in the Free Version

Without THOR's Signature Set

THOR ships with VALHALLA’s big encrypted signature database of more than 30,000 YARA signatures and undisclosed IOC sets. These signatures includes web shell rules, anomaly rules, malware rules, hack tool and tool output rules, malicious script and macro rules, exploit code rules and rules for registry and log file matching.

No Sigma Scanning

The full THOR versions applies 1000+ Sigma rules on log data of the scanned end systems using the –sigma flag.

No Registry Module

The Registry module applies the filename IOCs and THOR’s YARA rules for Registry detection to the loaded Registry and Registry Hives.

No Eventlog Module

(coming soon) The Eventlog analysis parses local Windows Eventlogs, checks for IOCs (e.g. filename IOCs) in the entries and applies Sigma rules to each log entry.

No SHIM Cache Module

The SHIM Cache  module analyses contents of the AppCompatCache on Windows systems, applies all filename IOCs, anomaly regex rules or just prints out all entries for your review. This module allows you to detect malicious or suspicious entries of programs that have been removed by adversaries long ago.

Other Missing Modules and Features

THOR Lite has many other modules and features that the full THOR version provides. You can find a full comparison here.

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