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New Worm Installs Sniffer
fmorgan writes "Netcraft just posted a note saying that a new worm installs a network sniffer in the infected computers." When I read these things it kind of makes me wonder why it took this long. Update: 09/13 22:47 GMT by T :
More innovation: Ant writes "The Register has a story about a piece of malware that 'talks' to victims. The Amus email worm uses Windows Speech Engine (which is built-in to Windows XP) to deliver a curious message to infected users.
The message reads: "How are you. I am back. My name is mister hamsi. I am seeing you. Haaaaaaaa. You must come to turkiye. I am cleaning your computer. 5. 4. 3. 2. 1. 0. Gule. Gule." ("Gule. Gule" is Turkish for "Bye. Bye". "Hamsi" is a small fish, like an anchovy, found in the Black Sea).
F-Secure has a copy of the sound file generated by the message."
New Worm Installs Network Traffic Sniffer
A new worm whose payload includes the SDBot trojan tries to install a "sniffer," seeking to use infected computers to capture login and banking information for other computers on the same network. While sniffers are hardly new, the bundling of a sniffer with an auto-propagating worm is a new wrinkle, according to security firms.
Sniffers are devices that monitor network traffic, and are a useful network administration tool. They can also be useful to hackers, who install them on compromised computers to monitor and intercept packets flowing through a network. This in turn enables the attacker to capture unencrypted usernames and passwords, which can be used to compromise additional machines on the network.
The sniffing capabilities of the new Worm-SDBot were documented by Trend Micro, and include a list of phrases associated with logins for network administration or Paypal accounts. "If the trojans described by Trend can successfully transmit the filter's packet captures back to the owner, they are going to cause problems well beyond typical bot infestation issues," according to the Internet Storm Center.
Malicious sniffers can be difficult to detect because their activity involves collecting packets, rather than transmitting them. Checking to see whether a network card is set in promiscuous (sniffing) mode is a common approach for users concerend about their own machines. Tools for detecting snifffers elsewhere on a network include Sentinel, AntiSniff.
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