Potentially Over Permissive Permissions Granted Using Dsacls.EXE

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

Detects usage of Dsacls to grant over permissive permissions

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: '\dsacls.exe'
OriginalFileName: DSACLS.EXE

Stage 2: `all of selection_flag`

CommandLine|contains: ' /G '

Stage 3: `all of selection_permissions`

or:
CommandLine|contains: GA
CommandLine|contains: GE
CommandLine|contains: GR
CommandLine|contains: GW
CommandLine|contains: WD
CommandLine|contains: WP

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	`/G` `GA` `GE` `GR` `GW` `WD` `WP`
`Image`	ends_with	`\dsacls.exe` corpus 2 (sigma 2)
`OriginalFileName`	eq	`DSACLS.EXE` corpus 2 (sigma 2)