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[Rule Tuning] Tune Threat Indicator Match Rules #2957

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Merged
merged 3 commits into from
Jul 26, 2023
Merged

[Rule Tuning] Tune Threat Indicator Match Rules #2957

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5efdde3
[Rule Tuning] Tune Threat Indicator Match Rules
w0rk3r Jul 24, 2023
331a7a8
Update threat_intel_indicator_match_url.toml
w0rk3r Jul 24, 2023
6fe29f9
Merge branch 'main' into ti_hash_empty
DefSecSentinel Jul 26, 2023
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10 changes: 2 additions & 8 deletions rules/cross-platform/threat_intel_indicator_match_hash.toml
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
[metadata]
creation_date = "2023/05/22"
maturity = "production"
updated_date = "2023/06/27"
updated_date = "2023/07/24"
min_stack_comments = """
Limiting the backport of these rules to the stack version which we are deprecating the Threat Intel Indicator Match
general rules.
Expand Down Expand Up @@ -44,7 +44,7 @@ threat_query = '''
'''

query = """
file.hash.*:* or file.pe.imphash:* or process.hash.*:* or process.pe.imphash:* or dll.hash.*:* or dll.pe.imphash:*
file.hash.*:* or file.pe.imphash:* or process.hash.*:* or process.pe.imphash:* or dll.hash.*:*
"""


Expand Down Expand Up @@ -147,12 +147,6 @@ field = "process.hash.sha256"
type = "mapping"
value = "threat.indicator.file.hash.sha256"

[[rule.threat_mapping]]
[[rule.threat_mapping.entries]]
field = "dll.pe.imphash"
type = "mapping"
value = "threat.indicator.file.pe.imphash"

[[rule.threat_mapping]]
[[rule.threat_mapping.entries]]
field = "process.pe.imphash"
Expand Down
22 changes: 5 additions & 17 deletions rules/cross-platform/threat_intel_indicator_match_url.toml
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
[metadata]
creation_date = "2023/05/22"
maturity = "production"
updated_date = "2023/07/03"
updated_date = "2023/07/24"
min_stack_comments = """
Limiting the backport of these rules to the stack version which we are deprecating the Threat Intel Indicator Match
general rules.
Expand Down Expand Up @@ -39,11 +39,11 @@ threat_language = "kuery"

threat_query = '''
@timestamp >= "now-30d/d" and event.module:(threatintel or ti_*) and
(threat.indicator.url.full:* or threat.indicator.url.domain:*) and not labels.is_ioc_transform_source:"true"
threat.indicator.url.full:* and not labels.is_ioc_transform_source:"true"
'''

query = """
url.full:* or url.domain:*
url.full:*
"""


Expand Down Expand Up @@ -94,18 +94,6 @@ value = "threat.indicator.url.full"

[[rule.threat_mapping]]
[[rule.threat_mapping.entries]]
field = "url.domain"
field = "url.original"
type = "mapping"
value = "threat.indicator.url.domain"

[[rule.threat_mapping]]
[[rule.threat_mapping.entries]]
field = "source.domain"
type = "mapping"
value = "threat.indicator.url.domain"

[[rule.threat_mapping]]
[[rule.threat_mapping.entries]]
field = "destination.domain"
type = "mapping"
value = "threat.indicator.url.domain"
value = "threat.indicator.url.original"