AWS Key Management Service (KMS) AWS-kms

9 operations, identified by eventName in the audit log.

eventName	Description
_catch_all	Catch-all entry for AWS-kms rules that match the service but not a specific eventName.
Decrypt	Decrypts ciphertext that was encrypted by an AWS KMS key.
DeleteImportedKeyMaterial	Deletes key material that was previously imported into a customer-managed KMS key, rendering the key unusable until new material is imported.
DisableKey	Sets the status of a KMS key to disabled, preventing its use in cryptographic operations until it is re-enabled.
ImportKeyMaterial	Imports cryptographic key material into a KMS key that was created with no key material, enabling the caller to supply their own key material.
ListAliases	Returns a paginated list of KMS key aliases in the account and region, including system-defined and user-defined aliases.
ListKeys	Returns a paginated list of KMS key IDs and ARNs for all customer-managed and AWS-managed keys in the current account and region.
PutKeyPolicy	Attaches a key policy to a KMS key, replacing any existing policy and controlling who can use or manage the key.
ScheduleKeyDeletion	Schedules a KMS key for deletion after a waiting period of 7 to 30 days, after which the key and its material are permanently deleted.

_catch_all: AWS-kms (catch-all)

Service: AWS-kms

Description

Catch-all entry for AWS-kms rules that match the service but not a specific eventName.

Fields #

Name	Description
`eventName`	The name of the API action that was called.
`eventSource`	The AWS service endpoint that received the request (e.g. iam.amazonaws.com).
`eventType`	CloudTrail event category: AwsApiCall, AwsConsoleSignIn, AwsConsoleAction, AwsServiceEvent, or AwsVpceEvents.
`userIdentity`	The IAM entity that made the request (type, principalId, arn, accountId, sessionContext).
`sourceIPAddress`	IP address of the caller, or the AWS service principal for service-initiated calls.
`awsRegion`	AWS Region the request was made to.
`requestParameters`	Parameters sent with the request. Shape is action-specific; null when none.
`responseElements`	Response elements. Shape is action-specific; null for reads or when absent.
`errorCode`	AWS service error code when the request failed. Absent on success.
`errorMessage`	Description of the error when errorCode is present.

Decrypt

Service: AWS-kms

Description

Decrypts ciphertext that was encrypted by an AWS KMS key.

Fields #

Name	Description
`eventName`	The name of the API action that was called.
`eventSource`	The AWS service endpoint that received the request (e.g. iam.amazonaws.com).
`eventType`	CloudTrail event category: AwsApiCall, AwsConsoleSignIn, AwsConsoleAction, AwsServiceEvent, or AwsVpceEvents.
`userIdentity`	The IAM entity that made the request (type, principalId, arn, accountId, sessionContext).
`sourceIPAddress`	IP address of the caller, or the AWS service principal for service-initiated calls.
`awsRegion`	AWS Region the request was made to.
`requestParameters`	Parameters sent with the request. Shape is action-specific; null when none.
`responseElements`	Response elements. Shape is action-specific; null for reads or when absent.
`errorCode`	AWS service error code when the request failed. Absent on success.
`errorMessage`	Description of the error when errorCode is present.

DeleteImportedKeyMaterial

Service: AWS-kms

Description

Deletes key material that was previously imported into a customer-managed KMS key, rendering the key unusable until new material is imported.

Fields #

Name	Description
`eventName`	The name of the API action that was called.
`eventSource`	The AWS service endpoint that received the request (e.g. iam.amazonaws.com).
`eventType`	CloudTrail event category: AwsApiCall, AwsConsoleSignIn, AwsConsoleAction, AwsServiceEvent, or AwsVpceEvents.
`userIdentity`	The IAM entity that made the request (type, principalId, arn, accountId, sessionContext).
`sourceIPAddress`	IP address of the caller, or the AWS service principal for service-initiated calls.
`awsRegion`	AWS Region the request was made to.
`requestParameters`	Parameters sent with the request. Shape is action-specific; null when none.
`responseElements`	Response elements. Shape is action-specific; null for reads or when absent.
`errorCode`	AWS service error code when the request failed. Absent on success.
`errorMessage`	Description of the error when errorCode is present.

Detection Rules #

View all rules referencing this event →

Sigma #

AWS KMS Imported Key Material Usage source high: Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. This activity is uncommon and provides a high certainty signal.↳ also matches ImportKeyMaterial

DisableKey

Service: AWS-kms

Description

Sets the status of a KMS key to disabled, preventing its use in cryptographic operations until it is re-enabled.

Fields #

Name	Description
`eventName`	The name of the API action that was called.
`eventSource`	The AWS service endpoint that received the request (e.g. iam.amazonaws.com).
`eventType`	CloudTrail event category: AwsApiCall, AwsConsoleSignIn, AwsConsoleAction, AwsServiceEvent, or AwsVpceEvents.
`userIdentity`	The IAM entity that made the request (type, principalId, arn, accountId, sessionContext).
`sourceIPAddress`	IP address of the caller, or the AWS service principal for service-initiated calls.
`awsRegion`	AWS Region the request was made to.
`requestParameters`	Parameters sent with the request. Shape is action-specific; null when none.
`responseElements`	Response elements. Shape is action-specific; null for reads or when absent.
`errorCode`	AWS service error code when the request failed. Absent on success.
`errorMessage`	Description of the error when errorCode is present.

Common Indicators #

Field/value combinations most frequently checked by detection rules targeting this event, derived from cross-vendor predicate analysis.

Field	Kind	Value	Rules	Vendors
`Provider_Name`	eq	`kms.amazonaws.com`	1 rule	elastic

Detection Rules #

View all rules referencing this event →

Elastic #

AWS KMS Customer Managed Key Disabled or Scheduled for Deletion source medium: Identifies attempts to disable or schedule the deletion of an AWS customer managed KMS Key. Disabling or scheduling a KMS key for deletion removes the ability to decrypt data encrypted under that key and can permanently destroy access to critical resources. Adversaries may use these operations to cause irreversible data loss, disrupt business operations, impede incident response, or hide evidence of prior activity. Because KMS keys often protect sensitive or regulated data, any modification to their lifecycle should be considered highly sensitive and investigated promptly.↳ also matches ScheduleKeyDeletion

YARA-L #

AWS KMS Key Disabled Or Scheduled For Deletion source: Detect when a KMS (Key Management Service) key is disabled or scheduled for deletion.↳ also matches ScheduleKeyDeletion

ImportKeyMaterial

Service: AWS-kms

Description

Imports cryptographic key material into a KMS key that was created with no key material, enabling the caller to supply their own key material.

Fields #

Name	Description
`eventName`	The name of the API action that was called.
`eventSource`	The AWS service endpoint that received the request (e.g. iam.amazonaws.com).
`eventType`	CloudTrail event category: AwsApiCall, AwsConsoleSignIn, AwsConsoleAction, AwsServiceEvent, or AwsVpceEvents.
`userIdentity`	The IAM entity that made the request (type, principalId, arn, accountId, sessionContext).
`sourceIPAddress`	IP address of the caller, or the AWS service principal for service-initiated calls.
`awsRegion`	AWS Region the request was made to.
`requestParameters`	Parameters sent with the request. Shape is action-specific; null when none.
`responseElements`	Response elements. Shape is action-specific; null for reads or when absent.
`errorCode`	AWS service error code when the request failed. Absent on success.
`errorMessage`	Description of the error when errorCode is present.

Detection Rules #

View all rules referencing this event →

Sigma #

AWS KMS Imported Key Material Usage source high: Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. This activity is uncommon and provides a high certainty signal.↳ also matches DeleteImportedKeyMaterial

ListAliases

Service: AWS-kms

Description

Returns a paginated list of KMS key aliases in the account and region, including system-defined and user-defined aliases.

Fields #

Name	Description
`eventName`	The name of the API action that was called.
`eventSource`	The AWS service endpoint that received the request (e.g. iam.amazonaws.com).
`eventType`	CloudTrail event category: AwsApiCall, AwsConsoleSignIn, AwsConsoleAction, AwsServiceEvent, or AwsVpceEvents.
`userIdentity`	The IAM entity that made the request (type, principalId, arn, accountId, sessionContext).
`sourceIPAddress`	IP address of the caller, or the AWS service principal for service-initiated calls.
`awsRegion`	AWS Region the request was made to.
`requestParameters`	Parameters sent with the request. Shape is action-specific; null when none.
`responseElements`	Response elements. Shape is action-specific; null for reads or when absent.
`errorCode`	AWS service error code when the request failed. Absent on success.
`errorMessage`	Description of the error when errorCode is present.

ListKeys

Service: AWS-kms

Description

Returns a paginated list of KMS key IDs and ARNs for all customer-managed and AWS-managed keys in the current account and region.

Fields #

Name	Description
`eventName`	The name of the API action that was called.
`eventSource`	The AWS service endpoint that received the request (e.g. iam.amazonaws.com).
`eventType`	CloudTrail event category: AwsApiCall, AwsConsoleSignIn, AwsConsoleAction, AwsServiceEvent, or AwsVpceEvents.
`userIdentity`	The IAM entity that made the request (type, principalId, arn, accountId, sessionContext).
`sourceIPAddress`	IP address of the caller, or the AWS service principal for service-initiated calls.
`awsRegion`	AWS Region the request was made to.
`requestParameters`	Parameters sent with the request. Shape is action-specific; null when none.
`responseElements`	Response elements. Shape is action-specific; null for reads or when absent.
`errorCode`	AWS service error code when the request failed. Absent on success.
`errorMessage`	Description of the error when errorCode is present.

PutKeyPolicy

Service: AWS-kms

Description

Attaches a key policy to a KMS key, replacing any existing policy and controlling who can use or manage the key.

Fields #

Name	Description
`eventName`	The name of the API action that was called.
`eventSource`	The AWS service endpoint that received the request (e.g. iam.amazonaws.com).
`eventType`	CloudTrail event category: AwsApiCall, AwsConsoleSignIn, AwsConsoleAction, AwsServiceEvent, or AwsVpceEvents.
`userIdentity`	The IAM entity that made the request (type, principalId, arn, accountId, sessionContext).
`sourceIPAddress`	IP address of the caller, or the AWS service principal for service-initiated calls.
`awsRegion`	AWS Region the request was made to.
`requestParameters`	Parameters sent with the request. Shape is action-specific; null when none.
`responseElements`	Response elements. Shape is action-specific; null for reads or when absent.
`errorCode`	AWS service error code when the request failed. Absent on success.
`errorMessage`	Description of the error when errorCode is present.

Common Indicators #

Field/value combinations most frequently checked by detection rules targeting this event, derived from cross-vendor predicate analysis.

Field	Kind	Value	Rules	Vendors
`Provider_Name`	eq	`kms.amazonaws.com`	1 rule	elastic

Detection Rules #

View all rules referencing this event →

Elastic #

AWS KMS Key Policy Updated via PutKeyPolicy source medium: Identifies successful PutKeyPolicy calls on AWS KMS keys. The key policy is a resource-based policy that controls which principals can use the key for cryptographic operations and administration. Adversaries with "kms:PutKeyPolicy" may add or broaden principals (including external accounts) to decrypt or exfiltrate data protected by the key, or to preserve access after other credentials are rotated. This is distinct from disabling or scheduling deletion of the key.

ScheduleKeyDeletion

Service: AWS-kms

Description

Schedules a KMS key for deletion after a waiting period of 7 to 30 days, after which the key and its material are permanently deleted.

Fields #

Name	Description
`eventName`	The name of the API action that was called.
`eventSource`	The AWS service endpoint that received the request (e.g. iam.amazonaws.com).
`eventType`	CloudTrail event category: AwsApiCall, AwsConsoleSignIn, AwsConsoleAction, AwsServiceEvent, or AwsVpceEvents.
`userIdentity`	The IAM entity that made the request (type, principalId, arn, accountId, sessionContext).
`sourceIPAddress`	IP address of the caller, or the AWS service principal for service-initiated calls.
`awsRegion`	AWS Region the request was made to.
`requestParameters`	Parameters sent with the request. Shape is action-specific; null when none.
`responseElements`	Response elements. Shape is action-specific; null for reads or when absent.
`errorCode`	AWS service error code when the request failed. Absent on success.
`errorMessage`	Description of the error when errorCode is present.

Common Indicators #

Field/value combinations most frequently checked by detection rules targeting this event, derived from cross-vendor predicate analysis.

Field	Kind	Value	Rules	Vendors
`Provider_Name`	eq	`kms.amazonaws.com`	1 rule	elastic

Detection Rules #

View all rules referencing this event →

Elastic #

AWS KMS Customer Managed Key Disabled or Scheduled for Deletion source medium: Identifies attempts to disable or schedule the deletion of an AWS customer managed KMS Key. Disabling or scheduling a KMS key for deletion removes the ability to decrypt data encrypted under that key and can permanently destroy access to critical resources. Adversaries may use these operations to cause irreversible data loss, disrupt business operations, impede incident response, or hide evidence of prior activity. Because KMS keys often protect sensitive or regulated data, any modification to their lifecycle should be considered highly sensitive and investigated promptly.↳ also matches DisableKey

YARA-L #

AWS KMS Key Disabled Or Scheduled For Deletion source: Detect when a KMS (Key Management Service) key is disabled or scheduled for deletion.↳ also matches DisableKey

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`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)