PUA - Potential PE Metadata Tamper Using Rcedit

Severity: medium
Author: Micah Babinski
Source: upstream

Detects the use of rcedit to potentially alter executable PE metadata properties, which could conceal efforts to rename system utilities for defense evasion.

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1027` Obfuscated Files or Information, `T1027.005` Obfuscated Files or Information: Indicator Removal from Tools, `T1036` Masquerading, `T1036.003` Masquerading: Rename Legitimate Utilities

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `all of selection_img`

or:
Description: 'Edit resources of exe'
Image|endswith: '\rcedit-x64.exe'
Image|endswith: '\rcedit-x86.exe'
Product: rcedit

Stage 2: `all of selection_flags`

CommandLine|contains: --set-

Stage 3: `all of selection_attributes`

or:
CommandLine|contains: CompanyName
CommandLine|contains: FileDescription
CommandLine|contains: LegalCopyright
CommandLine|contains: OriginalFileName
CommandLine|contains: ProductName
CommandLine|contains: ProductVersion

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	`--set-` `CompanyName` `FileDescription` `LegalCopyright` `OriginalFileName` `ProductName` `ProductVersion`
`Description`	eq	`Edit resources of exe`
`Image`	ends_with	`\rcedit-x64.exe` `\rcedit-x86.exe`
`Product`	eq	`rcedit`