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4 replies to this topic

#1 Overath


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Posted 13 March 2018 - 10:28 AM

I believe it is possible I have a keylogger on my PC. ( I have Windows !0 on my desktop)

Please don't post and simply say this is highly unlikely or make comments in the same vein. Just assume I am right and hopefully I may get an answer to my question!

I must add I am a layperson with computers and in no sense an expert.

If there is a keylogger present does this present a danger if one was using a credit card, or a system such as PayPal, when buying a product using the Internet.

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#2 zbuster225


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Posted 13 March 2018 - 04:17 PM

Yes, that presents a danger when using a credit card.  Conceptually it records all of your keystrokes and it would not be difficult to parse looking for credit card numbers or other juicy information. Your best option is to reinstall the OS at your earliest convenience.  Your second best option is to be 100% sure you scrubbed it.


Something important to remember is that for the keylogger to be "useful" to the person who installed it, they need to be able to get the data.  Some keyloggers would require them to return to the scene of the crime and manually grab a text file.  Other keyloggers will send the data via your network connection (or in some cases, bluetooth.) Air-gapping your computer and limiting physical access to your computer might be a good course of action until you're sure it is gone.

#3 MarkMackerel


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Posted 14 March 2018 - 07:45 AM

If you do have this keylogger then assume everything you have typed since you got it is in the attackers hands. You will need to promptly change all passwords, cancel all cards etc. Do this from a different machine. Assume anything you connected to the device is also compromised and reformat those too.

#4 Didier Stevens

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Posted 14 March 2018 - 05:49 PM

A keylogger is always a danger, as it will record confidential information for third parties.

Didier Stevens

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Microsoft MVP 2011-2016 Consumer Security, Windows Insider MVP 2016-2019


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#5 STS-1


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Posted 22 March 2018 - 01:32 AM

Also keep in mind that you can have hardware keyloggers as well as software keyloggers, so if your talking about a computer at work or somewhere that is open access to other people check the computer (and ethernet cable if hardwired) for odd looking or unrecognized devices

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