IIS WebServer Access Logs Deleted

Severity: medium
Author: Tim Rauch (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
Source: upstream

Detects the deletion of IIS WebServer access logs which may indicate an attempt to destroy forensic evidence

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1070` Indicator Removal

Event coverage

Provider	Event ID	Title
Sysmon	23	FileDelete (File Delete archived)
Sysmon	26	FileDeleteDetected (File Delete logged)

Stages and Predicates

Stage 1: `selection`

TargetFilename|endswith: .log
TargetFilename|contains: '\inetpub\logs\LogFiles\'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.