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- http://blog.washingt...s_wirele_1.html
June 11, 2008 - "...recent versions of the ubiquitous "Zlob" Trojan (also known as DNSChanger) will check to see if the victim uses a wireless or wired hardware router. If so, it tries to guess the password needed to administer the router by consulting a built-in list* of default router username/password combinations. If successful, the malware alters the victim's domain name system (DNS) records so that all future traffic passes through the attacker's network first. DNS can be thought of as the Internet's phone book, translating human-friendly names like example.com into numeric addresses that are easier for networking equipment to handle. While researchers have long warned that threats against hardware routers could one day be incorporated into malicious software, this appears to be the first time this behavior has been spotted in malware released into the wild. The type of functionality incorporated into this version of the Zlob Trojan is extremely concerning for a number of reasons. First, Zlob is among the most common type of Trojan downloaded onto Windows machines. According to Microsoft, the company's malicious software removal tool [MSRT] zapped some 14.3 million instances of Zlob-related malware from customer machines in the second half of 2007. The other, more important reason this shift is scary is that a Windows user with a machine infected with a Zlob/DNSChanger variant may succeed in cleaning the malware off an infected computer completely, but still leave the network compromised. Few regular PC users (or even PC technicians) think to look to the router settings, provided the customer's Internet connection is functioning fine... Specific, manufacturer-based video tutorials on how to secure your wireless router are available at this link**..."
* http://blog.washingt...ix/zlobpass.txt
** http://onguardonline...orials-wireless
- http://www.trustedso...ks-into-routers
June 13, 2008 - "...behavior is entirely controlled by the attackers’ DNS servers. These could even redirect existing domain names to servers hosting crafted content (Phishing) or servers dynamically modifying real content. Once your DNS settings are under control, the bad possibilities are nearly unlimited. And, even clean machines are affected once a previous infection on just one client behind the shared router successfully cracked the router login..."
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Edited by AplusWebMaster, 18 June 2008 - 05:19 AM.
