Spyre – Simple YARA-based IOC Scanner

…a basic, self-contained modular host-centered IOC scanner
Spyre is a straightforward host-dependent IOC scanner built all-around the YARA sample matching engine and other scan modules. The key purpose of this venture is uncomplicated operationalization of YARA rules and other indicators of compromise.
Consumers need to bring their own rule sets. The wonderful-yara repository presents a good overview of no cost yara rule sets out there.
Spyre is meant to be applied as an investigation tool by incident responders. It is not meant to evolve into any kind of endpoint security support.

Overview
Applying Spyre is straightforward:

1. Incorporate YARA signatures. For each default, YARA guidelines for file scans are read through from filescan.yar, procscan.yar for file scans, process memory scans, respectively. The following alternatives exist for providing regulations documents to Spyre (and will be tried in this order):
   
   1. Insert the rule documents to ZIP file and append that file to the binary.
   2. Incorporate the rule data files to a ZIP file title $Software.zip: If the Spyre binary is referred to as spyre or spyre.exe, use spyre.zip.
   3. Set the rule information into the similar listing as the binary.

   ZIP file contents may perhaps be encrypted working with the password infected (AV industry normal) to stop antivirus software package from mistaking pieces of the ruleset as destructive content and stopping the scan.
   YARA rule files may possibly incorporate include things like statements.

2. Deploy, operate the scanner
3. Accumulate report

Configuration
Run-time possibilities can be possibly passed through command line parameters or by means of file that params.txt. Vacant strains and lines starting with the # character are ignored. Each line is interpreted as a single command line argument.
If a ZIP file has been appended to the Spyre binary, configuration and other files this kind of as YARA regulations are only go through from this ZIP file. Or else, they are read from the listing into which the binary has been positioned.
Some options permit specifying a list of merchandise. This can be performed by separating the merchandise using a semicolon ().

--high-precedence
Normally (unless of course this swap is enabled), Spyre instructs the OS scheduler to decreased the priorities of CPU time and I/O operations, in purchase to avoid disruption of normal process procedure.

--established-hostname=Identify
Explicitly established the hostname that will be utilised in the log file and in the report. This is ordinarily not desired.

--loglevel=Level
Set the log stage. Valid: trace, debug, data, discover, warn, error, peaceful.

--report=SPEC
Set one particular or far more report targets, separated by a semicolon (). Default: spyre.log in the current doing work directory, applying the simple structure.
A diverse output structure can be specified by appending ,format=Format. The adhering to formats are at the moment supported:

• simple, the default, a very simple human-readable textual content structure
• tsjson, a JSON document that can be imported into Timesketch

--route=PATHLIST
Set a person or additional unique filesystem paths to scan. Default: / (Unix) or all set drives (Windows).

--yara-file-guidelines=FILELIST
Set list of YARA rule files for scanning information on the process. Default: Use filescan.yar from appended ZIP file, $Program.ZIP, or present operating listing.

--yara-proc-rules=FILELIST
Established list of YARA rule data files for scanning processes’ memory areas. Default: Use procscan.yar from appended ZIP file, $Program.ZIP, or present operating directory.

--max-file-dimension=Measurement
Established highest size for data files to be scanned working with YARA. Default: 32MB

--ioc-file=FILE

Notes about YARA rules
YARA is configured with default settings, furthermore the subsequent express switches (cf. 3rdparty.mk):

• --disable-magic
• --disable-cuckoo
• --enable-dotnet
• --permit-macho
• --enable-dex

Setting up
Spyre can be built for 32little bit and 64bit Linux and Windows targets on a Debian/buster system (or a chroot) in which the pursuing deals have been installed:

• make
• gcc
• gcc-multilib
• gcc-mingw-w64
• autoconf
• automake
• libtool
• pkg-config
• wget
• patch
• sed
• golang-$Version-go, e.g. golang-1.8-go. The Makefile will routinely find the latest edition until GOROOT has been established.
• git-main
• ca-certificates
• zip

When all the things has been installed, just form make. This should really down load archives for musl-libc, openssl, yara, build these and then develop spyre.
The bare spyre binaries are produced in _construct//.
Jogging make launch generates a ZIP file that is made up of those binaries for all supported architectures.

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