Classification

Category: Malware

Type: -

Aliases: Chango

Summary


This is a Visual Basic Script trojan that has been spammed as "Men & Women.html".

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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Submit a sample

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Technical Details


Part of the code is encrypted and decrypts on the fly. If a user open this file Chango first checks the Visual Basic Script version. If it is more than 4 then it creates two files: "C:\WINDOWS\LOGOS.SYS" and "C:\WINDOWS\LOGOW.SYS". Those files are scriptlet objects and contain the string "TROJAN.Chango".

After that the trojan attempts to create in the Windows startup directory of English, Spanish and Portuguese environments the file "TROJAN.CHANGO.HTM".

Further every time the a system is rebooted it will run the IE and open "TROJAN.CHANGO.HTM" that looks like:

Chango doesn't contain any destructive payload.