Uncommon Process Access Rights For Target Image

Severity: low
Author: Nasreddine Bencherchali (Nextron Systems), frack113
Source: upstream

Detects process access request to uncommon target images with a "PROCESS_ALL_ACCESS" access mask.

MITRE ATT&CK coverage

Tactic	Techniques
Privilege Escalation	`T1055.011` Process Injection: Extra Window Memory Injection
Defense Evasion	`T1055.011` Process Injection: Extra Window Memory Injection

Event coverage

Provider	Event ID	Title
Sysmon	10	ProcessAccess

Stages and Predicates

Stage 1: `selection`

or:
TargetImage|endswith: '\calc.exe'
TargetImage|endswith: '\calculator.exe'
TargetImage|endswith: '\mspaint.exe'
TargetImage|endswith: '\notepad.exe'
TargetImage|endswith: '\ping.exe'
TargetImage|endswith: '\wordpad.exe'
TargetImage|endswith: '\write.exe'
GrantedAccess: 0x1FFFFF

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.