Dorifel/Quervar: the support scammer’s secret weapon

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Dorifel/Quervar: the support scammer’s secret weapon
Botnet	Dorifel, XDocCrypt, Quervar
Malware
Botnet/malware group
Exploit kits
Services
Feature
Distribution vector
Target
Origin
Campaign
Operation/Working group
Vulnerability
CCProtocol
Date	2012 / 13 août 2012
Editor/Conference	ESET
Link	http://blog.eset.com/2012/08/11/dorifelquervar-the-support-scammers-secret-weapon blog.eset.com (blog.eset.com Archive copy)
Author	David Harley
Type

Abstract

“ The malware that some people are calling Dorifel or XDocCrypt (ESET detects it as Win32/Quervar.C and has a cleaner for it here) is having enormous impact right now, mostly in the Netherlands. It has some very interesting characteristics – it infects documents (and true executables) by appending them RC4-encrypted to the body of a new executable – and there’ll be a technical analysis by Róbert Lipovský here shortly.

However, apart from its intrinsic technical interest, it seems that it’s being used for scamming purposes that even its authors may not have anticipated. Martijn Grooten, of Virus Bulletin, tells me that it has attracted the attention of telephone support scammers, who are using it to convince potential victims in the Netherlands that they need to let the scammer ‘clean’ or ‘protect’ their systems. For a price, as always…

Bibtex

 @misc{2012BFR1095,
   editor = {ESET},
   author = {David Harley},
   title = {Dorifel/Quervar: the support scammer’s secret weapon},
   date = {},
   month = ,
   year = {2012},
   howpublished = {\url{http://blog.eset.com/2012/08/11/dorifelquervar-the-support-scammers-secret-weapon blog.eset.com}},
 }