Cisco Cloud Security - Hack Tool User-Agent Detected

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

'Detects suspicious user agent strings used by known hack tools'

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1059` Command and Scripting Interpreter
Discovery	`T1046` Network Service Discovery
Lateral Movement	`T1021` Remote Services
Collection	`T1557` Adversary-in-the-Middle
Command & Control	`T1102` Web Service
Exfiltration	`T1020` Automated Exfiltration

Rule body

id: 8d537f3c-094f-430c-a588-8a87da36ee3a
name: Cisco Cloud Security - Hack Tool User-Agent Detected
description: |
  'Detects suspicious user agent strings used by known hack tools'
severity: Medium
status: Available
requiredDataConnectors:
  - connectorId: CiscoUmbrellaDataConnector
    dataTypes:
      - Cisco_Umbrella_proxy_CL
queryFrequency: 15m
queryPeriod: 15m
triggerOperator: gt
triggerThreshold: 0
tactics:
  - Execution
  - Discovery
  - LateralMovement
  - Collection
  - CommandAndControl
  - Exfiltration
relevantTechniques:
  - T1059
  - T1046
  - T1021
  - T1557
  - T1102
  - T1020
query: |
  let user_agents=dynamic([
                            '(hydra)',
                            ' arachni/',
                            ' BFAC ',
                            ' brutus ',
                            ' cgichk ',
                            'core-project/1.0',
                            ' crimscanner/',
                            'datacha0s',
                            'dirbuster',
                            'domino hunter',
                            'dotdotpwn',
                            'FHScan Core',
                            'floodgate',
                            'get-minimal',
                            'gootkit auto-rooter scanner',
                            'grendel-scan',
                            ' inspath ',
                            'internet ninja',
                            'jaascois',
                            ' zmeu ',
                            'masscan',
                            ' metis ',
                            'morfeus fucking scanner',
                            'n-stealth',
                            'nsauditor',
                            'pmafind',
                            'security scan',
                            'springenwerk',
                            'teh forest lobster',
                            'toata dragostea',
                            ' vega/',
                            'voideye',
                            'webshag',
                            'webvulnscan',
                            ' whcc/',
                            ' Havij',
                            'absinthe',
                            'bsqlbf',
                            'mysqloit',
                            'pangolin',
                            'sql power injector',
                            'sqlmap',
                            'sqlninja',
                            'uil2pn',
                            'ruler',
                            'Mozilla/5.0 (Windows; U; Windows NT 5.1; pt-PT; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)'
                            ]);
  Cisco_Umbrella
  | where EventType == "proxylogs"
  | where HttpUserAgentOriginal has_any (user_agents)
  | extend Message = "Hack Tool User Agent"
  | project TimeGenerated, Message, SrcIpAddr, DstIpAddr, UrlOriginal, HttpUserAgentOriginal
entityMappings:
  - entityType: URL
    fieldMappings:
      - identifier: Url
        columnName: UrlOriginal
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: SrcIpAddr
version: 1.1.3
kind: Scheduled

Stages and Predicates

Let binding: `user_agents` used in Stage 3

let user_agents = dynamic([
                          '(hydra)',
                          ' arachni/',
                          ' BFAC ',
                          ' brutus ',
                          ' cgichk ',
                          'core-project/1.0',
                          ' crimscanner/',
                          'datacha0s',
                          'dirbuster',
                          'domino hunter',
                          'dotdotpwn',
                          'FHScan Core',
                          'floodgate',
                          'get-minimal',
                          'gootkit auto-rooter scanner',
                          'grendel-scan',
                          ' inspath ',
                          'internet ninja',
                          'jaascois',
                          ' zmeu ',
                          'masscan',
                          ' metis ',
                          'morfeus fucking scanner',
                          'n-stealth',
                          'nsauditor',
                          'pmafind',
                          'security scan',
                          'springenwerk',
                          'teh forest lobster',
                          'toata dragostea',
                          ' vega/',
                          'voideye',
                          'webshag',
                          'webvulnscan',
                          ' whcc/',
                          ' Havij',
                          'absinthe',
                          'bsqlbf',
                          'mysqloit',
                          'pangolin',
                          'sql power injector',
                          'sqlmap',
                          'sqlninja',
                          'uil2pn',
                          'ruler',
                          'Mozilla/5.0 (Windows; U; Windows NT 5.1; pt-PT; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)'
                          ]);

Stage 1: `source`

Cisco_Umbrella

Stage 2: `where`

| where EventType == "proxylogs"

Stage 3: `where`

| where HttpUserAgentOriginal has_any (user_agents)

Stage 4: `extend`

| extend Message = "Hack Tool User Agent"

Stage 5: `project`

| project TimeGenerated, Message, SrcIpAddr, DstIpAddr, UrlOriginal, HttpUserAgentOriginal

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`EventType`	eq	`proxylogs`	`field:"EventType" kind:eq value:"proxylogs"`
`HttpUserAgentOriginal`	match	`BFAC` transforms: `term` `Havij` transforms: `term` `arachni/` transforms: `term` `brutus` transforms: `term` `cgichk` transforms: `term` `crimscanner/` transforms: `term` `inspath` transforms: `term` `metis` transforms: `term` `vega/` transforms: `term` `whcc/` transforms: `term` `zmeu` transforms: `term` `(hydra)` transforms: `term` `FHScan Core` transforms: `term` `Mozilla/5.0 (Windows; U; Windows NT 5.1; pt-PT; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)` transforms: `term` `absinthe` transforms: `term` `bsqlbf` transforms: `term` `core-project/1.0` transforms: `term` `datacha0s` transforms: `term` `dirbuster` transforms: `term` `domino hunter` transforms: `term` `dotdotpwn` transforms: `term` `floodgate` transforms: `term` `get-minimal` transforms: `term` `gootkit auto-rooter scanner` transforms: `term` `grendel-scan` transforms: `term` `internet ninja` transforms: `term` `jaascois` transforms: `term` `masscan` transforms: `term` `morfeus fucking scanner` transforms: `term` `mysqloit` transforms: `term` `n-stealth` transforms: `term` `nsauditor` transforms: `term` `pangolin` transforms: `term` `pmafind` transforms: `term` `ruler` transforms: `term` `security scan` transforms: `term` `springenwerk` transforms: `term` `sql power injector` transforms: `term` `sqlmap` transforms: `term` `sqlninja` transforms: `term` `teh forest lobster` transforms: `term` `toata dragostea` transforms: `term` `uil2pn` transforms: `term` `voideye` transforms: `term` `webshag` transforms: `term` `webvulnscan` transforms: `term`	`field:"HttpUserAgentOriginal" kind:match`

Output fields

These fields are emitted when the rule matches.

Field	Source
`DstIpAddr`	`project`
`HttpUserAgentOriginal`	`project`
`Message`	`project`
`SrcIpAddr`	`project`
`TimeGenerated`	`project`
`UrlOriginal`	`project`

Cisco Cloud Security - Hack Tool User-Agent Detected

MITRE ATT&CK coverage

Rule body

Stages and Predicates

Let binding: user_agents used in Stage 3

Stage 1: source

Stage 2: where

Stage 3: where

Stage 4: extend

Stage 5: project

Indicators

Output fields

Let binding: `user_agents` used in Stage 3

Stage 1: `source`

Stage 2: `where`

Stage 3: `where`

Stage 4: `extend`

Stage 5: `project`