Question Malware hijacks browser to post on message boards

Apr 20, 2019
Hi all,

I haven't been to this board in years, but I remember it as a good place to get help. Well, I need help. :oops:

There is something attacking both Chrome and Firefox to post messages from me to a board I frequent (Aquarium Advice, fwiw). It happens when I try to reply to a message or a private message. The malware simply posts my user name in the message body field --or the message title field, if there is quoted text in the body text box and the title is empty-- and then posts it to the board. In other words, it's a single word message from me of just my user name. It doesn't do this every time, but maybe every 3-5 times, and it's become very annoying.

At first I thought it was only infecting Chrome, but today I noted the behavior in Firefox. Argh. Before that, I had gone so far as to delete Chrome entirely from my system and then re-install it, but, obviously that didn't help. I use both AVG antivirus and Malwarebytes Premium, both up-to-date, but the problem still happens. And Aquarium Advice is the only board this seems to happen on. (It would be one of my favorites. 😒 )

Any advice is welcome, as are any follow-up questions. Details of my system are below.

Thanks much!

Win 10 Home edition
12GB ram
CPU i7-4771 3.5 GHZ

Version 73.0.3683.103 (Official Build) (64-bit)

Version 66.0.3 (64-bit)

AVG version 19.3.3084, build 19.3.4241.450, UI 1.0.156
Malwarebytes, Component Package Version 1.0.563, Update Package Version 1.0.10258


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