Use of VSIISExeLauncher.exe

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

The "VSIISExeLauncher.exe" binary part of the Visual Studio/VS Code can be used to execute arbitrary binaries

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1127` Trusted Developer Utilities Proxy Execution

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `all of selection_img`

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

Stage 2: `all of selection_cli`

or:
CommandLine|contains: ' -a '
CommandLine|contains: ' -p '

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	`-a` corpus 4 (sigma 4) `-p` corpus 5 (sigma 5)
`Image`	ends_with	`\VSIISExeLauncher.exe`
`OriginalFileName`	eq	`VSIISExeLauncher.exe`