Users Asks: Signs of a backdoor Trojan ?

Hello all…. I go by the handle of ‘antibotnet’ at Yahoo Answers > Security. Here is a helpful question and answer I thought to share…

Signs of a backdoor Trojan?
If i had a backdoor intruder on my machine what would i notice to make me suspicious?


In older days going back at least five years ago and more, malware was practically always obvious as to “something seems to be running in the background”. This is because computers were much smaller and specifically with RAM Memory which is kind of a cache of memory used by like all the start up programs you see the little icons for down in the lower right system tray and running programs. RAM Memory was very small at the release of Windows XP (2001) which it was common as from the factory at 256K RAM. This led to the famous coined phrase “512M RAM Upgrade” which was simply adding another 256M RAM memory stick inside the computer, a snap in.

Today it is common to see 1Gig RAM as small and inefficient and probably on now legacy left over com puters for sale. Most new ones are beginning at 2Gig RAM which is 8 times the size as the above XP example at 256M RAM. 3Gig of RAM is quite common place now in new PCs and 4Gig RAM but with expandable to a whopping 8 Gigs !! !

That being said – and adding the upgraded processors that are now dual and quad processors with much higher speeds as standard equipment and being on broadband leaving dial up in the dust as a 56K connection compared to 1M and up to 4G broadband/dsl connectivity speeds – all that being said, it is not that easy at all to ‘SUSPECT SOMETHING RUNNING IN THE BACKGROUND because the PC navigation has bogged down time to time when you are not running stuff.

((NOTE: What of malware bogs down the system ? Spyware that is broadcasting out – copied files, screen snapshots, keylogger data, etc. Mass-mailing worm. Downloader Trojan or Rootkit that are installing more malware. Full blown Botnet Infection that may contain all of the above plus has added some P2P (peer to peer) software and is using the machine to not only download and upload piracy software and files – but also is continually spewing illegal crimewares as viruses and worms and spywares etc.)))

Like you are not mega multi-tasking with like 4 programs open and running. You might have one thing open you are doing and in older days when you additionally where navigating around the system like opening another program or additionally starting up a new email – suddenly the whole system almost would go to a crawl – bogged down navigation, terribly.

THAT was a sure sign there was malware running in the background and generally as spyware or a worm such as a spam worm emailing everyone in an address book of email addresses on the computer.

Backdoor threats as Trojan Downloaders are actually more newer in malware somewhat well after the middle of this past decade. As comparison, these were virtually unheard of going back 7 years and further. Again, because of the larger computer sizes and upgrades – it is much, much more difficult to simply sense a malware as these running in stealth, not naked to the visible eye.

The best thing to do is simply install and use quality antimalware that has both antivirus and antispyware and Real Time Protection processes. Adding a personal software firewall aids that too. Perform Full Scans at least once a week !

What would make you suspicious ? IDTheft, new malware installed and not knowing how – are two suspicious symptoms of backdoor threats. This is what they do.


Glossary of Malware
Backdoor – A Backdoor is a secret or undocumented way of gaining access to a program, online service, computer or an entire computer network. Most Backdoors are designed to exploit a vulnerability in a system and open it to future access by an attacker. A Backdoor is a potential security risk in that it allows an attacker to gain unauthorized access to a computer and the files stored thereon.

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