CrowdStrike MacOS Added Trusted Cert

Severity: medium
Entities: ip_addresses, md5_hashes, sha1_hashes, sha256_hashes, trace_ids
Log types: Crowdstrike.FDREvent
Reference: https://docs.panther.com/data-onboarding/supported-logs/crowdstrike#crowdstrike.processrollup2
Source: github.com/panther-labs/panther-analysis

Detects attempt to install a root certificate on MacOS

MITRE ATT&CK coverage

Tactic	Techniques
Defense Impairment	`T1553.004` Subvert Trust Controls: Install Root Certificate

Rule body yaml

AnalysisType: rule
DisplayName: CrowdStrike MacOS Added Trusted Cert
Description: Detects attempt to install a root certificate on MacOS
Enabled: true
Filename: crowdstrike_macos_add_trusted_cert.py
RuleID: Crowdstrike.Macos.Add.Trusted.Cert
Reference: https://docs.panther.com/data-onboarding/supported-logs/crowdstrike#crowdstrike.processrollup2
Severity: Medium
LogTypes:
  - Crowdstrike.FDREvent
Tests:
  - Name: Added root cert
    ExpectedResult: true
    Log:
      {
        "aid": "1234abcdefghijklmnop",
        "aip": "1.2.3.4",
        "cid": "abcde098654321xyz",
        "configbuild": "1007.4.0016804.11",
        "configstatehash": "1260279761",
        "entitlements": "15",
        "event":
          {
            "CodeSigningFlags": "570506001",
            "CommandLine": "security add-trusted-cert -d -r trusted",
            "ConfigBuild": "1007.4.0016804.11",
            "ConfigStateHash": "1260279761",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "GID": "20",
            "ImageFileName": "/usr/bin/security",
            "MD5HashData": "5a29b1ee210395604829dafd744a8039",
            "MachOSubType": "1",
            "ParentBaseFileName": "zsh",
            "ParentProcessId": "488592041865603507",
            "ProcessEndTime": "",
            "ProcessGroupId": "488638905187012012",
            "ProcessStartTime": "1685123957.068",
            "RGID": "501",
            "RUID": "501",
            "RawProcessId": "51673",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "fc708414b7e7c0df8d7711d0362b4dbd79a45fba65bdc646848fa8f50e9035de",
            "SVGID": "20",
            "SVUID": "501",
            "SessionProcessId": "488592041748162994",
            "SigningId": "com.apple.Foundation.plutil",
            "SourceProcessId": "488592041865603507",
            "SourceThreadId": "0",
            "Tags": "316",
            "TargetProcessId": "488638905187012012",
            "TeamId": "-",
            "UID": "501",
            "aid": "1234abcdefghijklmnop",
            "aip": "1.2.3.4",
            "cid": "abcde098654321xyz",
            "event_platform": "Mac",
            "event_simpleName": "ProcessRollup2",
            "id": "59c9d5fb-b9b7-43a3-913f-6df72d9e1969",
            "name": "ProcessRollup2MacV9",
            "timestamp": "1685123957235",
          },
        "event_platform": "Mac",
        "event_simplename": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "59c9d5fb-b9b7-43a3-913f-6df72d9e1969",
        "name": "ProcessRollup2MacV9",
        "p_any_ip_addresses": ["1.2.3.4"],
        "p_any_md5_hashes":
          [
            "1234abcdefghijklmnop",
            "5a29b1ee210395604829dafd744a8039",
            "abcde098654321xyz",
          ],
        "p_any_sha1_hashes": ["0000000000000000000000000000000000000000"],
        "p_any_sha256_hashes":
          ["fc708414b7e7c0df8d7711d0362b4dbd79a45fba65bdc646848fa8f50e9035de"],
        "p_any_trace_ids": ["1234abcdefghijklmnop", "abcde098654321xyz"],
        "p_event_time": "2023-05-26 17:59:17.235",
        "p_log_type": "Crowdstrike.FDREvent",
        "p_parse_time": "2023-05-26 18:11:03.404",
        "p_row_id": "d6ff1555b3f6e785b3e2bbb218abf524",
        "p_schema_version": 0,
        "p_source_id": "e4962678-a986-44af-a757-18163a2bc963",
        "p_source_label": "Crowdstrike",
        "timestamp": "2023-05-26 17:59:17.235",
      }
  - Name: Windows log
    ExpectedResult: false
    Log:
      {
        "aid": "1234abcdefghijklmnop",
        "aip": "1.2.3.4",
        "cid": "abcde098654321xyz",
        "configbuild": "1007.4.0016804.11",
        "configstatehash": "1260279761",
        "entitlements": "15",
        "event":
          {
            "CodeSigningFlags": "570506001",
            "CommandLine": "security add-trusted-cert -d -r trusted",
            "ConfigBuild": "1007.4.0016804.11",
            "ConfigStateHash": "1260279761",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "GID": "20",
            "ImageFileName": "/usr/bin/security",
            "MD5HashData": "5a29b1ee210395604829dafd744a8039",
            "MachOSubType": "1",
            "ParentBaseFileName": "zsh",
            "ParentProcessId": "488592041865603507",
            "ProcessEndTime": "",
            "ProcessGroupId": "488638905187012012",
            "ProcessStartTime": "1685123957.068",
            "RGID": "501",
            "RUID": "501",
            "RawProcessId": "51673",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "fc708414b7e7c0df8d7711d0362b4dbd79a45fba65bdc646848fa8f50e9035de",
            "SVGID": "20",
            "SVUID": "501",
            "SessionProcessId": "488592041748162994",
            "SigningId": "com.apple.Foundation.plutil",
            "SourceProcessId": "488592041865603507",
            "SourceThreadId": "0",
            "Tags": "316",
            "TargetProcessId": "488638905187012012",
            "TeamId": "-",
            "UID": "501",
            "aid": "1234abcdefghijklmnop",
            "aip": "1.2.3.4",
            "cid": "abcde098654321xyz",
            "event_platform": "Mac",
            "event_simpleName": "ProcessRollup2",
            "id": "59c9d5fb-b9b7-43a3-913f-6df72d9e1969",
            "name": "ProcessRollup2MacV9",
            "timestamp": "1685123957235",
          },
        "event_platform": "Win",
        "event_simplename": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "59c9d5fb-b9b7-43a3-913f-6df72d9e1969",
        "name": "ProcessRollup2MacV9",
        "p_any_ip_addresses": ["1.2.3.4"],
        "p_any_md5_hashes":
          [
            "1234abcdefghijklmnop",
            "5a29b1ee210395604829dafd744a8039",
            "abcde098654321xyz",
          ],
        "p_any_sha1_hashes": ["0000000000000000000000000000000000000000"],
        "p_any_sha256_hashes":
          ["fc708414b7e7c0df8d7711d0362b4dbd79a45fba65bdc646848fa8f50e9035de"],
        "p_any_trace_ids": ["1234abcdefghijklmnop", "abcde098654321xyz"],
        "p_event_time": "2023-05-26 17:59:17.235",
        "p_log_type": "Crowdstrike.FDREvent",
        "p_parse_time": "2023-05-26 18:11:03.404",
        "p_row_id": "d6ff1555b3f6e785b3e2bbb218abf524",
        "p_schema_version": 0,
        "p_source_id": "e4962678-a986-44af-a757-18163a2bc963",
        "p_source_label": "Crowdstrike",
        "timestamp": "2023-05-26 17:59:17.235",
      }
  - Name: Wrong FDR event type
    ExpectedResult: false
    Log:
      {
        "aid": "1234abcdefghijklmnop",
        "aip": "1.2.3.4",
        "cid": "abcde098654321xyz",
        "configbuild": "1007.4.0016804.11",
        "configstatehash": "1260279761",
        "entitlements": "15",
        "event":
          {
            "CodeSigningFlags": "570506001",
            "CommandLine": "security add-trusted-cert -d -r trusted",
            "ConfigBuild": "1007.4.0016804.11",
            "ConfigStateHash": "1260279761",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "GID": "20",
            "ImageFileName": "/usr/bin/security",
            "MD5HashData": "5a29b1ee210395604829dafd744a8039",
            "MachOSubType": "1",
            "ParentBaseFileName": "zsh",
            "ParentProcessId": "488592041865603507",
            "ProcessEndTime": "",
            "ProcessGroupId": "488638905187012012",
            "ProcessStartTime": "1685123957.068",
            "RGID": "501",
            "RUID": "501",
            "RawProcessId": "51673",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "fc708414b7e7c0df8d7711d0362b4dbd79a45fba65bdc646848fa8f50e9035de",
            "SVGID": "20",
            "SVUID": "501",
            "SessionProcessId": "488592041748162994",
            "SigningId": "com.apple.Foundation.plutil",
            "SourceProcessId": "488592041865603507",
            "SourceThreadId": "0",
            "Tags": "316",
            "TargetProcessId": "488638905187012012",
            "TeamId": "-",
            "UID": "501",
            "aid": "1234abcdefghijklmnop",
            "aip": "1.2.3.4",
            "cid": "abcde098654321xyz",
            "event_platform": "Mac",
            "event_simpleName": "ProcessRollup2",
            "id": "59c9d5fb-b9b7-43a3-913f-6df72d9e1969",
            "name": "ProcessRollup2MacV9",
            "timestamp": "1685123957235",
          },
        "event_platform": "Mac",
        "event_simplename": "DnsRequest",
        "fdr_event_type": "DnsRequest",
        "id": "59c9d5fb-b9b7-43a3-913f-6df72d9e1969",
        "name": "ProcessRollup2MacV9",
        "p_any_ip_addresses": ["1.2.3.4"],
        "p_any_md5_hashes":
          [
            "1234abcdefghijklmnop",
            "5a29b1ee210395604829dafd744a8039",
            "abcde098654321xyz",
          ],
        "p_any_sha1_hashes": ["0000000000000000000000000000000000000000"],
        "p_any_sha256_hashes":
          ["fc708414b7e7c0df8d7711d0362b4dbd79a45fba65bdc646848fa8f50e9035de"],
        "p_any_trace_ids": ["1234abcdefghijklmnop", "abcde098654321xyz"],
        "p_event_time": "2023-05-26 17:59:17.235",
        "p_log_type": "Crowdstrike.FDREvent",
        "p_parse_time": "2023-05-26 18:11:03.404",
        "p_row_id": "d6ff1555b3f6e785b3e2bbb218abf524",
        "p_schema_version": 0,
        "p_source_id": "e4962678-a986-44af-a757-18163a2bc963",
        "p_source_label": "Crowdstrike",
        "timestamp": "2023-05-26 17:59:17.235",
      }
  - Name: Wrong executable path
    ExpectedResult: false
    Log:
      {
        "aid": "1234abcdefghijklmnop",
        "aip": "1.2.3.4",
        "cid": "abcde098654321xyz",
        "configbuild": "1007.4.0016804.11",
        "configstatehash": "1260279761",
        "entitlements": "15",
        "event":
          {
            "CodeSigningFlags": "570506001",
            "CommandLine": "security add-trusted-cert -d -r trusted",
            "ConfigBuild": "1007.4.0016804.11",
            "ConfigStateHash": "1260279761",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "GID": "20",
            "ImageFileName": "/home/test/bin/security",
            "MD5HashData": "5a29b1ee210395604829dafd744a8039",
            "MachOSubType": "1",
            "ParentBaseFileName": "zsh",
            "ParentProcessId": "488592041865603507",
            "ProcessEndTime": "",
            "ProcessGroupId": "488638905187012012",
            "ProcessStartTime": "1685123957.068",
            "RGID": "501",
            "RUID": "501",
            "RawProcessId": "51673",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "fc708414b7e7c0df8d7711d0362b4dbd79a45fba65bdc646848fa8f50e9035de",
            "SVGID": "20",
            "SVUID": "501",
            "SessionProcessId": "488592041748162994",
            "SigningId": "com.apple.Foundation.plutil",
            "SourceProcessId": "488592041865603507",
            "SourceThreadId": "0",
            "Tags": "316",
            "TargetProcessId": "488638905187012012",
            "TeamId": "-",
            "UID": "501",
            "aid": "1234abcdefghijklmnop",
            "aip": "1.2.3.4",
            "cid": "abcde098654321xyz",
            "event_platform": "Mac",
            "event_simpleName": "ProcessRollup2",
            "id": "59c9d5fb-b9b7-43a3-913f-6df72d9e1969",
            "name": "ProcessRollup2MacV9",
            "timestamp": "1685123957235",
          },
        "event_platform": "Mac",
        "event_simplename": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "59c9d5fb-b9b7-43a3-913f-6df72d9e1969",
        "name": "ProcessRollup2MacV9",
        "p_any_ip_addresses": ["1.2.3.4"],
        "p_any_md5_hashes":
          [
            "1234abcdefghijklmnop",
            "5a29b1ee210395604829dafd744a8039",
            "abcde098654321xyz",
          ],
        "p_any_sha1_hashes": ["0000000000000000000000000000000000000000"],
        "p_any_sha256_hashes":
          ["fc708414b7e7c0df8d7711d0362b4dbd79a45fba65bdc646848fa8f50e9035de"],
        "p_any_trace_ids": ["1234abcdefghijklmnop", "abcde098654321xyz"],
        "p_event_time": "2023-05-26 17:59:17.235",
        "p_log_type": "Crowdstrike.FDREvent",
        "p_parse_time": "2023-05-26 18:11:03.404",
        "p_row_id": "d6ff1555b3f6e785b3e2bbb218abf524",
        "p_schema_version": 0,
        "p_source_id": "e4962678-a986-44af-a757-18163a2bc963",
        "p_source_label": "Crowdstrike",
        "timestamp": "2023-05-26 17:59:17.235",
      }
  - Name: Help command
    ExpectedResult: false
    Log:
      {
        "aid": "1234abcdefghijklmnop",
        "aip": "1.2.3.4",
        "cid": "abcde098654321xyz",
        "configbuild": "1007.4.0016804.11",
        "configstatehash": "1260279761",
        "entitlements": "15",
        "event":
          {
            "CodeSigningFlags": "570506001",
            "CommandLine": "security help",
            "ConfigBuild": "1007.4.0016804.11",
            "ConfigStateHash": "1260279761",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "GID": "20",
            "ImageFileName": "/usr/bin/security",
            "MD5HashData": "5a29b1ee210395604829dafd744a8039",
            "MachOSubType": "1",
            "ParentBaseFileName": "zsh",
            "ParentProcessId": "488592041865603507",
            "ProcessEndTime": "",
            "ProcessGroupId": "488638905187012012",
            "ProcessStartTime": "1685123957.068",
            "RGID": "501",
            "RUID": "501",
            "RawProcessId": "51673",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "fc708414b7e7c0df8d7711d0362b4dbd79a45fba65bdc646848fa8f50e9035de",
            "SVGID": "20",
            "SVUID": "501",
            "SessionProcessId": "488592041748162994",
            "SigningId": "com.apple.Foundation.plutil",
            "SourceProcessId": "488592041865603507",
            "SourceThreadId": "0",
            "Tags": "316",
            "TargetProcessId": "488638905187012012",
            "TeamId": "-",
            "UID": "501",
            "aid": "1234abcdefghijklmnop",
            "aip": "1.2.3.4",
            "cid": "abcde098654321xyz",
            "event_platform": "Mac",
            "event_simpleName": "ProcessRollup2",
            "id": "59c9d5fb-b9b7-43a3-913f-6df72d9e1969",
            "name": "ProcessRollup2MacV9",
            "timestamp": "1685123957235",
          },
        "event_platform": "Mac",
        "event_simplename": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "59c9d5fb-b9b7-43a3-913f-6df72d9e1969",
        "name": "ProcessRollup2MacV9",
        "p_any_ip_addresses": ["1.2.3.4"],
        "p_any_md5_hashes":
          [
            "1234abcdefghijklmnop",
            "5a29b1ee210395604829dafd744a8039",
            "abcde098654321xyz",
          ],
        "p_any_sha1_hashes": ["0000000000000000000000000000000000000000"],
        "p_any_sha256_hashes":
          ["fc708414b7e7c0df8d7711d0362b4dbd79a45fba65bdc646848fa8f50e9035de"],
        "p_any_trace_ids": ["1234abcdefghijklmnop", "abcde098654321xyz"],
        "p_event_time": "2023-05-26 17:59:17.235",
        "p_log_type": "Crowdstrike.FDREvent",
        "p_parse_time": "2023-05-26 18:11:03.404",
        "p_row_id": "d6ff1555b3f6e785b3e2bbb218abf524",
        "p_schema_version": 0,
        "p_source_id": "e4962678-a986-44af-a757-18163a2bc963",
        "p_source_label": "Crowdstrike",
        "timestamp": "2023-05-26 17:59:17.235",
      }

Detection logic

Condition

event_platform eq "Mac"
fdr_event_type eq "ProcessRollup2"
event.ImageFileName eq "/usr/bin/security"
event.CommandLine contains "add-trusted-cert"

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`event.CommandLine`	contains	`add-trusted-cert`
`event.ImageFileName`	eq	`/usr/bin/security`
`event_platform`	eq	`Mac` corpus 3 (panther 3)
`fdr_event_type`	eq	`ProcessRollup2` corpus 10 (panther 10)

Output fields

Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.

Field	Source
`aid`
`CommandLine`
`TargetProcessId`
`RawProcessId`
`ParentBaseFileName`
`ParentProcessId`
`ImageFileName`
`SHA256Hash`	`SHA256HashData`
`platform`	`event_platform`
`ComputerName`

`j` / `k`	Scroll down / up
`d` / `u`	Half-page down / up
`gg` / `G`	Top / bottom
`h` / `l`	History back / forward
`f`	Follow link (`Shift` = new tab)
`/`	Focus search
`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
`Esc`	Close results / dialog

`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)