VBS/Carewmr is a trojan written with Visual Basic Script. Upon execution the trojan displays three messages.
Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.
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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 e-mail to firstname.lastname@example.org and please indicate the Code Error.
The trojan has the following comment in the beginning:
'VBS.CarewMR.a By Jadraquer Killer (Mr.Carew)
F-Secure Anti-Virus detects this trojan with the current updates.
Technical Details: Katrin Tocheva and Sami Rautiainen; translation: Ero Carrera; F-Secure Corp.; October