DLL Load By System Process From Suspicious Locations

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

Detects when a system process (i.e. located in system32, syswow64, etc.) loads a DLL from a suspicious location or a location with permissive permissions such as "C:\Users\Public"

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1070` Indicator Removal

Event coverage

Provider	Event ID	Title
Sysmon	7	Image loaded

Stages and Predicates

Stage 1: `selection`

or:
ImageLoaded|startswith: 'C:\PerfLogs\'
ImageLoaded|startswith: 'C:\Users\Public\'
Image|startswith: 'C:\Windows\'

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.