Cisco SE - Possible webshell

Status: available
Severity: high
Time window: 15m
Source: github.com/Azure/Azure-Sentinel

'Detects possible webshell on host.'

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	`T1102` Web Service

Rule body

id: d2c97cc9-1ccc-494d-bad4-564700451a2b
name: Cisco SE - Possible webshell
description: |
  'Detects possible webshell on host.'
severity: High
requiredDataConnectors:
  - connectorId: CiscoSecureEndpoint
    dataTypes:
      - CiscoSecureEndpoint
queryFrequency: 15m
queryPeriod: 15m
triggerOperator: gt
triggerThreshold: 0
status: Available
tactics:
  - CommandAndControl
relevantTechniques:
  - T1102
query: |
  CiscoSecureEndpoint
  | where EventMessage has 'Possible webshell'
  | extend HostCustomEntity = DstHostname, MalwareCustomEntity = ThreatName
entityMappings:
  - entityType: Host
    fieldMappings:
      - identifier: HostName
        columnName: HostCustomEntity
  - entityType: Malware
    fieldMappings:
      - identifier: Name
        columnName: MalwareCustomEntity
version: 1.0.0
kind: Scheduled

Stages and Predicates

Stage 1: `source`

CiscoSecureEndpoint

Stage 2: `where`

| where EventMessage has 'Possible webshell'

Stage 3: `extend`

| extend HostCustomEntity = DstHostname, MalwareCustomEntity = ThreatName

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`EventMessage`	match	`Possible webshell` transforms: `term`	`field:"EventMessage" kind:match value:"Possible webshell"`

Output fields

These fields are emitted when the rule matches.

Field	Source
`HostCustomEntity`	`extend`
`MalwareCustomEntity`	`extend`

Cisco SE - Possible webshell

MITRE ATT&CK coverage

Rule body

Stages and Predicates

Stage 1: source

Stage 2: where

Stage 3: extend

Indicators

Output fields

Stage 1: `source`

Stage 2: `where`

Stage 3: `extend`