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New Rule: Generic Chrome Extension Rule With A Widened Scope #4598

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merged 4 commits into from
Nov 28, 2023

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joshnck
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@joshnck joshnck commented Nov 27, 2023

Summary of the Pull Request

Scope for this rule is too narrow. By limiting the parent processes, you're missing out on important chrome browser extensions. For example, Silver's CursedChrome would pass right through as would BurpSuite's chrome extension.

Instead the ParentImage is moved to the fields as it is interesting and important for the analyst, but should not narrow the scope of the search.

Fro this a lower severity rule that disregard the parent is created.

Changelog

new: Chromium Browser Instance Executed With Custom Extension
update: Suspicious Chromium Browser Instance Executed With Custom Extension - Fix typo in the rule title and description

Example Log Event

CommandLine= *load-extension=c:\Users\<>\AppData\Roaming\BurpSuite\burp=chromium-extension chrome://newtab

Fixed Issues

N/A

SigmaHQ Rule Creation Conventions

  • If your PR adds new rules, please consider following and applying these conventions

Scope for this rule is too narrow. By limiting the parent processes, you're missing out on important chrome browser extensions. For example, Silver's CursedChrome would pass right through as would BurpSuite's chrome extension.

Instead the ParentImage is moved to the `fields` as it is interesting and important for the analyst, but should not narrow the scope of the search.
@github-actions github-actions bot added Rules Windows Pull request add/update windows related rules labels Nov 27, 2023
@frack113
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Hi,
For me it is the title that must be updated , like "Suspicious Spawn Chromium Browser Instance With Custom Extensions".
Can be a new rule derived without the ParentImage with a level at medium at best.

@nasbench nasbench requested a review from phantinuss November 28, 2023 09:38
@nasbench nasbench added the 2nd Review Needed PR need a second approval label Nov 28, 2023
@nasbench nasbench changed the title Modified Chrome Extension rule to widen scope New Rule: Generic Chrome Extension Rule With A Widened Scope Nov 28, 2023
@nasbench nasbench removed the 2nd Review Needed PR need a second approval label Nov 28, 2023
@nasbench nasbench merged commit 17bcf41 into SigmaHQ:master Nov 28, 2023
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4 participants