Website defacement attack

Rule ID

PH_Rule_IPS_15

Default Status

Enabled

Description

Detects high severity website defacement attack

Severity

MITRE ATT&CK® Tactics

Impact

Impact consists of techniques that adversaries use to disrupt availability or compromise integrity by manipulating business and operational processes. Techniques used for impact can include destroying or tampering with data. In some cases, business processes can look fine, but may have been altered to benefit the adversaries’ goals. These techniques might be used by adversaries to follow through on their end goal or to provide cover for a confidentiality breach.

https://attack.mitre.org/tactics/TA0040

MITRE ATT&CK® Techniques

T1491.001

Defacement: Internal Defacement

An adversary may deface systems internal to an organization in an attempt to intimidate or mislead users. This may take the form of modifications to internal websites, or directly to user systems with the replacement of the desktop wallpaper. Since internally defacing systems exposes an adversary's presence, it often takes place after other intrusion goals have been accomplished.

https://attack.mitre.org/techniques/T1491/001

T1491.002

Defacement: External Defacement

An adversary may deface systems external to an organization in an attempt to deliver messaging, intimidate, or otherwise mislead an organization or users. Externally-facing websites are a common victim of defacement; often targeted by adversary and hacktivist groups in order to push a political message or spread propaganda. Website defacement may also be used as setup, or a precursor, for future attacks such as Drive-by Compromise.

https://attack.mitre.org/techniques/T1491/002

Impacts

Network

Data Source

FortiGate via Syslog, FortiProxy via Syslog, Checkpoint IPS-1 via LEA/Syslog, PaloAlto PAN-OS via Syslog

Detection

Correlation

Remediation Guidance

No remediation guidance specified

Time Window

If the following pattern or patterns match an ingested event within the given time window in seconds, trigger an incident.

300 seconds

Trigger Conditions

If the following defined pattern/s occur within a 300 second time window.

WebDefacement

SubPattern Definitions

SubPattern Name: WebDefacement

This is the named definition of the event query, this is important if multiple subpatterns are defined to distinguish them.

SubPattern Query

This is the query logic that matches incoming events

eventType IN (Group@PH_SYS_EVENT_WebsiteDefacementAttack)

Group by Attributes

This defines how matching events are aggregated, only events with the same matching attribute values are grouped into one unique incident ID

srcIpAddr,destIpAddr,eventType,ipsSignatureId

Aggregate Constraint

This is most typically a numerical constraint that defines when the rule should trigger an incident

COUNT (*) >= 1

Incident Attribute Mapping

This section defines which fields in matching raw events should be mapped to the incident attributes in the resulting incident.

The available raw event attributes to map are limited to the group by attributes and the aggregate event constraint fields for each subpattern

 srcIpAddr = WebDefacement.srcIpAddr,
 destIpAddr = WebDefacement.destIpAddr,
 compEventType = WebDefacement.eventType,
 ipsSignatureId = WebDefacement.ipsSignatureId

FortiSIEM Rules