Potential ShellDispatch.DLL Sideloading

Severity: medium
Author: X__Junior (Nextron Systems)
Source: upstream

Detects potential DLL sideloading of "ShellDispatch.dll"

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1574.001` Hijack Execution Flow: DLL
Privilege Escalation	`T1574.001` Hijack Execution Flow: DLL
Defense Evasion	`T1574.001` Hijack Execution Flow: DLL

Event coverage

Provider	Event ID	Title
Sysmon	7	Image loaded

Stages and Predicates

Stage 1: `selection`

ImageLoaded|endswith: '\ShellDispatch.dll'

Stage 2: `not 1 of filter_main_legit_path`

or:
ImageLoaded|contains: ':\Users\'
ImageLoaded|contains: '\AppData\Local\Temp\'
ImageLoaded|contains: ':\Windows\Temp\'

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.

Field	Kind	Values
`ImageLoaded`	ends_with	`\ShellDispatch.dll`
`ImageLoaded`	match	`:\Users\` corpus 2 (sigma 2) `:\Windows\Temp\` corpus 2 (sigma 2) `\AppData\Local\Temp\` corpus 2 (sigma 2)