HOW TO REMOVE SYMBIAN (S60 v1 AND S60v2) VIRUS INFECTION?

The easiest and sure shot way of removing most mobile (S60 1st and 2nd edition only) viruses is to format the phone and memory card both.
Because the virus usually runs as a system process and resides in the memory, one cannot delete all the files related with virus while the phone is on. Usually virus related files have bizarre names (Like kktuqwe.exe, gdv.mdl etc) with extensions .exe .mdl and/or .sis. With the help of X-plore these files can be located in C:\(root) C:\System\Recogs, C:\System\Programs, C:\System\Apps, E:\(Root), E:\System\Apps, E:\System\Recogs, E:\System\Programs (And other hidden system folders). You can find and delete them easily but unfortunately the virus (That is still running) will recreate them instantly. So the best way is to format the phone, however formatting the Memory card is optional.

1. Before formatting the phone, backup your contacts and other data on memory card and/or PC. Now remove the memory card and format the phone.
2. If you don’t want to format the memory card then remove it before formatting the phone. Now connect it to your PC and scan with a good antivirus (Avast is the best and free antivirus that detects and removes most mobile viruses). Delete any infection detected. DO NOT re-insert the memory card before formatting the phone otherwise the virus will again infect it.
3. If you want to format memory card also, format it through PC first and then reformat it through formatted phone.

NOTE: If you can’t see hidden files in X-plore then proceed as follows
1. Run X-plore,
2. Press 0 (Zero) on keypad (Or go to Menu/Tools/Configuration)
3. Check the first 4 boxes
Press back and now you can see the hidden system files.

Most of the mobile antiviruses, I used to remove the virus, failed miserably, may be they are still not as good as their desktop counterparts. So in my opinion having an antivirus running on your Symbian phone (Having meager RAM) will do nothing but to slow down the device. One more reason for not having a mobile antivirus is that mobile viruses are not as sophisticated and sneaky as their Windows siblings and they just cannot enter your phone without your permission. So it’s all up to you that with a little precaution you can keep your mobile clean and healthy.

PLAYING GAMES WITH SYMBIAN VIRUS

Yesterday I came across a Symbian virus (With which my cousin’s Nokia N70 was infected). I analyzed its files (with the help of X-plore) and effects on phone. Avast antivirus showed its sis file as Malware/Virus on scanning (It is probably a variant of Commwarrior – One of the first mobile viruses known). This virus appeared to be not as damaging to the phone as some of its siblings (Skulls, Cabir etc). However it caused the phone hang frequently, slowing it down and draining battery too fast. It also automatically replicates and sends its copies (In the form of installable sis files) to other phones (Who have Bluetooth “On”). Now have a look at the names of sis files it sends – “girl.jpg”, “sex.3gp” etc (All showing fake extensions); a funny and “sexy” virus indeed.
I am really impressed with the creativity of the programmer of this virus (Had he made a good application rather than this crap, he would have become a famous and successful developer by now). Because the above names are so attention grabbing, anyone will install it and get infected easily. So prevention is the best way to avoid infection and the three golden rules of prevention are –
1. ALWAYS Keep your Bluetooth Off and On it only when required.
2. DO NOT open any message that is in the form of sis, jar, exe or any other installation format unless you know from where it came and what it is.
3. DO NOT EVER accept Bluetooth connection request from a suspicious source.

I kept some copies of this virus to understand Symbian virus architecture. Anyone interested (Specially developers) can get it from me. Just leave your request in the comment with your mail ID and I will send it to you. But please don’t use it with bad intention and I won’t be responsible for any damages whatsoever.

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