Apache - Known malicious user agent

Status: available
Severity: high
Time window: 10m
Source: github.com/Azure/Azure-Sentinel

'Detects known malicious user agents'

MITRE ATT&CK coverage

Tactic	Techniques
Initial Access	`T1133` External Remote Services `T1190` Exploit Public-Facing Application

Rule body

id: e9edfe1c-3afd-11ec-8d3d-0242ac130003
name: Apache - Known malicious user agent
description: |
  'Detects known malicious user agents'
severity: High
status: Available
requiredDataConnectors:
  - connectorId: CustomLogsAma
    datatypes:
      - ApacheHTTPServer_CL
queryFrequency: 10m
queryPeriod: 10m
triggerOperator: gt
triggerThreshold: 0
tactics:
  - InitialAccess
relevantTechniques:
  - T1190
  - T1133
query: |
  let mal_uas = dynamic(['Metasploit', '360Spider', '404checker', 'AllSubmitter', 'BackDoorBot', 'CATExplorador', 'Nikto', 'havij']);
  ApacheHTTPServer
  | where HttpUserAgentOriginal has_any (mal_uas)
  | extend IPCustomEntity = SrcIpAddr
entityMappings:
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: IPCustomEntity
version: 1.0.3
kind: Scheduled

Stages and Predicates

Parameters

let mal_uas = dynamic(['Metasploit', '360Spider', '404checker', 'AllSubmitter', 'BackDoorBot', 'CATExplorador', 'Nikto', 'havij']);

Stage 1: `source`

ApacheHTTPServer

Stage 2: `where`

| where HttpUserAgentOriginal has_any (mal_uas)

Stage 3: `extend`

| extend IPCustomEntity = SrcIpAddr

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`HttpUserAgentOriginal`	match	`360Spider` transforms: `term` `404checker` transforms: `term` `AllSubmitter` transforms: `term` `BackDoorBot` transforms: `term` `CATExplorador` transforms: `term` `Metasploit` transforms: `term` `Nikto` transforms: `term` `havij` transforms: `term`	`field:"HttpUserAgentOriginal" kind:match`

Output fields

These fields are emitted when the rule matches.

Field	Source
`IPCustomEntity`	`extend`

Apache - Known malicious user agent

MITRE ATT&CK coverage

Rule body

Stages and Predicates

Parameters

Stage 1: source

Stage 2: where

Stage 3: extend

Indicators

Output fields

Stage 1: `source`

Stage 2: `where`

Stage 3: `extend`