Use of Scriptrunner.exe

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

The "ScriptRunner.exe" binary can be abused to proxy execution through it and bypass possible whitelisting

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1218` System Binary Proxy Execution

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `all of selection_img`

or:
Image|endswith: '\ScriptRunner.exe'
OriginalFileName: ScriptRunner.exe

Stage 2: `all of selection_cli`

CommandLine|contains: ' -appvscript '

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
`CommandLine`	match	`-appvscript`
`Image`	ends_with	`\ScriptRunner.exe`
`OriginalFileName`	eq	`ScriptRunner.exe` corpus 3 (sigma 3)