Public IP Reconnaissance Activity
editPublic IP Reconnaissance Activity
editIdentifies domains commonly used by adversaries for post-exploitation IP reconnaissance. It is common for adversaries to test for Internet access and acquire their public IP address after they have gained access to a system. Among others, this has been observed in campaigns leveraging the information stealer, Trickbot.
Rule type: query
Rule indices:
- packetbeat-*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-6m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Network
- Threat Detection
- Discovery
Version: 1
Added (Elastic Stack release): 7.10.0
Rule authors: Elastic
Rule license: Elastic License
Potential false positives
editIf the domains listed in this rule are used as part of an authorized workflow, this rule will be triggered by those events. Validate that this is expected activity and tune the rule to fit your environment variables.
Investigation guide
editThis rule takes HTTP redirects and HTTP referrer’s into account, however neither HTTP redirect status codes nor HTTP referrer’s are visible with TLS traffic which can lead to multiple events per alert.
Rule query
editevent.category:network AND event.type:connection AND server.domain:(ipecho.net OR ipinfo.io OR ifconfig.co OR ifconfig.me OR icanhazip.com OR myexternalip.com OR api.ipify.org OR bot.whatismyipaddress.com OR ip.anysrc.net OR wtfismyip.com) AND NOT http.response.status_code:302 AND status:OK AND NOT _exists_:http.request.referrer
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Discovery
- ID: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
-
Technique:
- Name: System Network Configuration Discovery
- ID: T1016
- Reference URL: https://attack.mitre.org/techniques/T1016/