SYNOPSIS
yara [OPTION]... [RULEFILE]... FILE | PIDDESCRIPTION
Yara scans the given FILE or the process indentified by PID looking if it matches the patterns and rules provided in a special purpose-language. The rules are read from RULEFILEs or standard input.The options to yara(1) are:
- -t tag --tag=tag
- Print rules tagged as tag and ignore the rest. This option can be used multiple times.
- -i identifier --identifier=identifier
- Print rules named identifier and ignore the rest. This option can be used multiple times.
- -n --negate
- Print rules that doesn't apply (negate)
- -D --print-module-data
- Print module data.
- -g --print-tags
- Print the tags associated to the rule.
- -m --print-meta
- Print metadata associated to the rule.
- -s --print-strings
- Print strings found in the file.
- -p number --threads=number
- Use the specified number of threads to scan a directory.
- -l number --max-rules=number
- Abort scanning after a number of rules matched.
- -a seconds --timeout=seconds
- Abort scanning after a number of seconds has elapsed.
- -d identifier=value
- Define an external variable. This option can be used multiple times.
- -x module=file
- Pass file's content as extra data to module. This option can be used multiple times.
- -r --recursive
- Scan files in directories recursively.
- -f --fast-scan
- Speeds up scanning by searching only for the first occurrence of each pattern.
- -w --no-warnings
- Disable warnings.
- -v --version
- Show version information.
EXAMPLES
$ yara /foo/bar/rules1 /foo/bar/rules2 .-
Apply rules on /foo/bar/rules1 and /foo/bar/rules2 to all files on current directory. Subdirectories are not scanned.
$ yara -t Packer -t Compiler /foo/bar/rules bazfile
-
Apply rules on /foo/bar/rules to bazfile. Only reports rules tagged as Packer or Compiler.
$ cat /foo/bar/rules1 | yara -r /foo
-
Scan all files in the /foo directory and its subdirectories. Rules are read from standard input.
$ yara -d mybool=true -d myint=5 -d mystring="my string" /foo/bar/rules bazfile
-
Defines three external variables mybool myint and mystring.
$ yara -x cuckoo=cuckoo_json_report /foo/bar/rules bazfile
-
Apply rules on /foo/bar/rules to bazfile while passing the content of cuckoo_json_report to the cuckoo module.