Tutorial Spot a ‘Sleeper’ Browser Ext.. It's Actually Malware Benign add-ons can be weaponized malicious updates after gaining user trust. Dec 09, 2025

[Condobloke]

How to Spot a ‘Sleeper’ Browser Extension That’s Actually Malware

Benign add-ons can be weaponized with malicious updates after gaining user trust.

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Unfortunately, malicious extensions are usually pretending to be something else, so a quick visual check of your installed extensions may not reveal a problem. In this case, Koi Security has a list of the extension IDs associated with the ShadyPanda campaign, and you'll have to search for them one by one.
List of extensions: https://www.koi.ai/blog/4-million-b...-shadypanda-7-year-malware-campaign#heading-7
If you run Edge browser, pay attention the extensive list shown in this link

‘Netflix Party’ and Four Other Chrome Extensions That Are Actually Malware

Researchers discovered a new batch of malicious Chrome extensions.

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[KGIII]

The only thing that surprises me is that the number is that low.

 

[wizardfromoz]

I shouldn't be surprised, but I am saddened that this sort of thing happens.

I am very careful to establish the credentials of any extension before I put it on, but to have it go sour years onwards might fool me.

I will be even more vigilant.

Ta for sharing, Brian.

Chris