The Zeus malware has been updated with peer-to-peer functionality that makes it much more resistant to take-down attempts.
"The new version of the infamous banking Trojan was discovered and analyzed by Swiss security expert Roman Hssy, the creator of the abuse.ch Zeus and SpyEye tracking services," writes Computerworld's Lucian Constantin.
"Once installed on a computer, the new Zeus variant queries a set of hardcoded IP addresses that correspond to other infected systems," Constantin writes. "The Trojan downloads an updated set of IPs from them and if those computers are also running a newer version, it updates itself."
Go to "Zeus Trojan P2P update makes take-downs harder" to read the details.
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