Classification

Category: Malware

Type: Trojan

Aliases: Carewmr, VBS/Carewmr, VBS.AVFake

Summary


VBS/Carewmr is a trojan written with Visual Basic Script. Upon execution the trojan displays three messages.

Removal


Automatic action

Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.

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Technical Details


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)