VBS/Carewmr is a trojan written with Visual Basic Script. Upon execution the trojan displays three messages.
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
This a simple trojan that, when executed, will show following three messages:
Welcome to CLRAV of Kaspersky Labs, press OK or Accept to Start scanning your computer. ERROR!, Code error:3212552, please execute this tool in MS-DOS. Thank You for prefer Kaspersky Labs Products
At September 1st, it shows an additional message in Spanish:
Mr.Carew vuelve otra vez!!, jaja
which means in English
Mr.Carew comes back again!!, jaja
After these messsages, the trojan will open the web page https://www.avp.ru using the default browser.
Next, the trojan attemps to remove a number of registry keys, attempting to disable several security software:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\SystemTray HKLM\Software\Microsoft\Windows\CurrentVersion\Run\AVPCC HKLM\Software\Microsoft\Windows\CurrentVersion\Run\NAVW32 HKLM\Software\Microsoft\Windows\CurrentVersion\Run\TrueVector HKLM\Software\Microsoft\Windows\CurrentVersion\Run\ZoneAlarm Pro
The trojan also creates a number of directories and empty files to the root of the C: drive using for example names of different anti-virus products. It also attempts to delete all files from the C:\Windows directory.
Finally the trojan creates a text file to the current directory "CLRAV_Report.log" with the following content:
Due an error, Code error:3212552, CLRAV has not disinfect your computer For Support please send a email to support@kaspersky.com and please indicate the Code Error.
The trojan has the following comment in the beginning:
'VBS.CarewMR.a By Jadraquer Killer (Mr.Carew)