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engine, rules: support matching namespaces, not just rule names

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closes #37
This commit is contained in:
William Ballenthin
2020-06-29 05:54:56 -06:00
parent 0a5947290b
commit 3d0bd64e1b
4 changed files with 159 additions and 5 deletions
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50
tests/test_engine.py
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@@ -126,6 +126,7 @@ def test_match_matched_rules():
- match: test rule1
''')),
]
features, matches = capa.engine.match(capa.engine.topologically_order_rules(rules),
{capa.features.insn.Number(100): {1}}, 0x0)
assert capa.features.MatchedRule('test rule1') in features
@@ -215,3 +216,52 @@ def test_regex_complex():
features, matches = capa.engine.match(capa.engine.topologically_order_rules(rules),
{capa.features.String(r'Hardware\Key\key with spaces\some value'): {1}}, 0x0)
assert capa.features.MatchedRule('test rule') in features
def test_match_namespace():
rules = [
capa.rules.Rule.from_yaml(textwrap.dedent('''
rule:
meta:
name: CreateFile API
namespace: file/create
features:
- api: CreateFile
''')),
capa.rules.Rule.from_yaml(textwrap.dedent('''
rule:
meta:
name: WriteFile API
namespace: file/write
features:
- api: WriteFile
''')),
capa.rules.Rule.from_yaml(textwrap.dedent('''
rule:
meta:
name: file-create
features:
- match: file/create
''')),
capa.rules.Rule.from_yaml(textwrap.dedent('''
rule:
meta:
name: filesystem-any
features:
- match: file
''')),
]
features, matches = capa.engine.match(capa.engine.topologically_order_rules(rules),
{capa.features.insn.API('CreateFile'): {1}},
0x0)
assert 'CreateFile API' in matches
assert 'file-create' in matches
assert 'filesystem-any' in matches
features, matches = capa.engine.match(capa.engine.topologically_order_rules(rules),
{capa.features.insn.API('WriteFile'): {1}},
0x0)
assert 'WriteFile API' in matches
assert 'file-create' not in matches
assert 'filesystem-any' in matches