magic :: Velociraptor - Digging deeper!

magic

Function

Arg	Description	Type
path	Path to open and hash.	OSPath (required)
accessor	The accessor to use	string
type	Magic type (can be empty or ‘mime’ or ’extension’)	string
magic	Additional magic to load	string

Required Permissions: FILESYSTEM_READ

Description

Identify a file using magic rules.

Magic rules are designed to identify a file based on a sequence of tests. They are a great way of quickly triaging a file type based on its content, not its name.

Detection is facilitated via libmagic - a common library powering the unix “file” utility. Velociraptor comes with all of “file” basic magic signatures.

You can also write your own signatures using the magic syntax (see https://man7.org/linux/man-pages/man4/magic.4.html )

Example

The following will check all files in /var/lib applying a custom magic rule.

LET Magic = '''
0 search/1024 "GET Apache Logs
!:strength + 100
'''

SELECT FullPath, Size, magic(path=FullPath, magic=Magic)
FROM glob(globs="/var/lib/*")

NOTE: magic() requires reading the headers of each file which causes the file to be opened. If you have on-access scanning such as Windows Defender “Realtime monitoring”, applying magic() on many files (e.g. in a glob) may result in substantial load on the endpoint.