MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth |
Rule body
id: 21d3be4c-6088-4e76-b6eb-d25479019cb9
name: CiscoISE - Log files deleted
description: |
'Detects log file deleting activity.'
severity: Medium
status: Available
requiredDataConnectors:
- connectorId: SyslogAma
datatypes:
- Syslog
queryFrequency: 5m
queryPeriod: 5m
triggerOperator: gt
triggerThreshold: 0
tactics:
- DefenseEvasion
relevantTechniques:
- T1070.004
query: |
let lbtime = 5m;
CiscoISEEvent
| where TimeGenerated > ago(lbtime)
| where EventId in ('58015', '59101', '59102')
| project TimeGenerated, DvcHostname, DvcIpAddr, DstUserName
| extend HostCustomEntity = DvcHostname
| extend IPCustomEntity = DvcIpAddr
| extend AccountCustomEntity = DstUserName
entityMappings:
- entityType: Account
fieldMappings:
- identifier: FullName
columnName: AccountCustomEntity
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
- entityType: Host
fieldMappings:
- identifier: FullName
columnName: HostCustomEntity
version: 1.0.3
kind: Scheduled
Stages and Predicates
Parameters
let lbtime = 5m;
Stage 1: source
CiscoISEEvent
Stage 2: where
| where TimeGenerated > ago(lbtime)
Stage 3: where
| where EventId in ('58015', '59101', '59102')
Stage 4: project
| project TimeGenerated, DvcHostname, DvcIpAddr, DstUserName
Stage 5: extend (3 consecutive steps)
| extend HostCustomEntity = DvcHostname
| extend IPCustomEntity = DvcIpAddr
| extend AccountCustomEntity = DstUserName
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
EventId | in |
| field:"EventId" kind:in |
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
DstUserName | project |
DvcHostname | project |
DvcIpAddr | project |
TimeGenerated | project |
HostCustomEntity | extend |
IPCustomEntity | extend |
AccountCustomEntity | extend |