Win trojan storm bot net

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A number of anti-spam websites came under a distributed denial-of-service attack on January 12, Researching further back in time, we find that variants of the same malware family were released in similar fashion in November, December and early January. When Storm Worm runs, it attempts to link up with other infected hosts via peer-to-peer networking. Through this conduit it gets a URL which points to a second-stage win trojan storm bot net, which in turn downloads additional stages onto the infected system.

Those stages are usually named game0. This is the part which is responsible for linking up via the P2P network. The part in front of the equals sign is the peer hash, the part following is the IP address and port.

These peers are contacted to see if they have a particular hash the trojan is looking for. They in turn direct the infected client to other peers which may have the hash, until one is found. In the Storm Worm P2P code, the hash value doesn't actually correspond to a file, it is generated using an algorithm which takes as input the current system time and a random number between 0 and 31, outputting one of 32 possible hashes for any given day. When a peer responds with a search result containing this hash, it returns the searched-for hash, and also provides a "result" hash in the response packet the result hash is 05B3D57C0C90A in the illustration.

This hash is used as a decryption key by the Storm Worm P2P code, in concert with a second decryption key which is hard-coded in the win trojan storm bot net of the trojan itself. Also in the response packet is a single meta-tag named "id". The body of this tag contains an encrypted string which contains win trojan storm bot net URL of the win trojan storm bot net executable. No files are ever transferred between hosts; the meta-tag and the result hash are the only things the trojan needs from the peers in order to find the download site.

The DDoS attack is conducted by game4. It receives the target IP address and attack type by downloading a configuration file from a hard-coded website in the body of the trojan. The configuration file specifies the target by IP address only; the tool has no provisions to resolve DNS names to addresses. In addition to the anti-spam sites we saw being attacked, the configuration file has also been seen containing IP addresses win trojan storm bot net websites associated with the Warezov virus - another spam system, probably operated by a competing spam group.

It seems that this spam group is prone to attack anyone that interferes with its business model, be it anti-spammer win trojan storm bot net spammer, or in some cases, third-party services. For example, one IP address being attacked was capitalcollect. Following is a partial list of IP addresses seen targeted by win trojan storm bot net Storm Worm DDoS component during the time we were monitoring its control mechanism:.

On Jan 30, the spamhaus. However, it soon became clear that it was an unintended target - apparently the Warezov spammer sin an attempt to deflect the DDoS attack, changed the DNS "A" records for some of their domains to point to the spamhaus.

It is worth mentioning that multiple DDoS attacks have occurred in the December and January timeframe, targeted at anti-spam sites and anti-rootkit software developers. An attack was even launched against the personal website of the author of this analysis, in retaliation for research into botnet-controlled pump-and-dump stock spam. These attacks have been determined to be from no fewer than three independent and unrelated botnets.

We see now the spam war is escalating win trojan storm bot net new levels. It could be that the spammers have been emboldened by the successful attack on BlueFrog last year, which shut down a service that was affecting the spammers' ability to conduct their "business.

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From the department of cosmic justice comes this gem, spotted by researchers from Symantec: Once installed, the trojan components are stored in an invisible folder and use strong encryption to keep communications private. The bot can force its host to take instructions through internet relay chat, perform DDoS attacks, and post fraudulent messages to the victim's Facebook account, among other things.

Now, Symantec researchers have uncovered weaknesses in the bot's peer-to-peer functionality that allow rival criminals to remotely steal or plant files on the victim's hard drive.

That means the unknown gang that took the trouble to spread the infection in the first place risks having their botnet stolen from under their noses. Jnanabot's P2P feature is designed to make botnets harder to take down by providing multiple channels of communication.

After sending an infected machine a single GET request, a website can discover all the information needed to upload any file to any location on the host's file system. Attackers can then install a simple backdoor on a user's machine by, for instance, writing a malicious program to a computer's startup directory. Still, infection statistics gathered by Symantec in December are surprising.

They show that about 16 per cent of infections hit Macs. They didn't show any infections on Linux machines. Turner said that Jnanabot attacks on the open source platform weren't able to survive a reboot. The bot was discovered spreading over Facebook posts that planted the following message on infected users' Facebook pages: Once the recipient is infected, his Facebook page carries the same dire warning.

It's not the first time that malware developers have built gaping vulnerabilities into their wares. In September, researcher Billy Rios disclosed a weakness in the Zeus crimeware kit that makes it easy to take over huge networks of infected PCs. Symantec has more about the trojan here , here , and here. Minds Mastering Machines - Call for papers now open. The Register - Independent news and views for the tech community.

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