Free IOC and YARA Scanner

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

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Fast

Meet our new Go based scanner with improved performance

Multi-Platform

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

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Free

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.

Why do we share our scanner for free? What’s in for us?

We want to provide the community with a flexible YARA and IOC scanner, which is a worthy successor to LOKI
You start using our free scanner, see how it works and may be able to afford one of our enterprise-grade scanners
All that we ask for is your email address in order to inform you about new developments

Subscribe and Download

That’s it. No strings attached.

Not Included in the Free Version

THOR's Signature Set

THOR ships with VALHALLA’s big encrypted signature database of more than 12,000 YARA signatures and undisclosed IOC sets. These signatures includes more than 2000+ web shell rules, 500+ anomaly rules, 3000+ malware rules, 1500+ hack tool and tool output rules, 300+ malicious script and macro rules, 100+ exploit code rules and more than 100 rules for registry and log file matching.

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.

Registry Module

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

CEF Output

THOR supports the Common Event Format (CEF) as output format for optimal ArcSight integration

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.

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.