Disabled IE Security Features

Severity: high
Author: Florian Roth (Nextron Systems)
Source: upstream

Detects command lines that indicate unwanted modifications to registry keys that disable important Internet Explorer security features

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1562.001` Impair Defenses: Disable or Modify Tools

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation
Security-Auditing	4688	A new process has been created.

Stages and Predicates

Stage 1: `1 of selection1`

CommandLine|contains: ' -name IEHarden '
CommandLine|contains: ' -value 0 '

Stage 2: `1 of selection2`

CommandLine|contains: ' -name DEPOff '
CommandLine|contains: ' -value 1 '

Stage 3: `1 of selection3`

CommandLine|contains: ' -name DisableFirstRunCustomize '
CommandLine|contains: ' -value 2 '

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	`-name DEPOff` `-name DisableFirstRunCustomize` `-name IEHarden` `-value 0` `-value 1` `-value 2`