Super Bot

This sure looks like a nasty piece of work.

Massive botnet ‘indestructible,’ say researchers

A new and improved botnet that has infected more than four million PCs is “practically indestructible,” security researchers say.

“TDL-4,” the name for both the bot Trojan that infects machines and the ensuing collection of compromised computers, is “the most sophisticated threat today,” said Kaspersky Labs researcher Sergey Golovanov in a detailed analysis Monday.

“[TDL-4] is practically indestructible,” Golovanov said.

. . .

TDL-4 infects the MBR, or master boot record, of the PC with a rootkit — malware that hides by subverting the operating system. The master boot record is the first sector — sector 0 — of the hard drive, where code is stored to bootstrap the operating system after the computer’s BIOS does its start-up checks.

Because TDL-4 installs its rootkit on the MBR, it is invisible to both the operating system and more, importantly, security software designed to sniff out malicious code.

But that’s not TDL-4’s secret weapon.

What makes the botnet indestructible is the combination of its advanced encryption and the use of a public peer-to-peer (P2P) network for the instructions issued to the malware by command-and-control (C&C) servers.

See also:
TDL4 – Top Bot
Sophisticated TDL-4 Botnet Has 4.5 Million Infected Zombies
‘Indestructible’ rootkit enslaves 4.5m PCs in 3 months
TDL-4 creates 4.5 million PC ‘indestructible’ botnet
Security Researchers Discover the Mother of All Botnets
TDL-4: The ‘indestructible’ botnet?
There’s a Botnet Called TDL-4 That’s Virtually Indestructable
‘Indestructible’ Botnet Enslaves 4.5 Million PCs
‘Indestructible’ Zombie PC Botnet Borrows Exploit From Israeli, U.S. Cyberweapon
Have cybercriminals created the perfect botnet — undetectable and indestructible?

If you ever needed a reason and reminder to keep your operating system, anti-virus, and anti-spywware software patched and up to date, this would be a good one.

/remember, if you’re not part of the solution, you’re potentially part of the problem

Advertisements

Rustock Reigned In

Chalk up a big win for the white hats in the ongoing cyberwar against the evil spammers.

Good guys take down notorious Rustock spamming botnet

Rustock, one of the largest and most notorious spam botnets, suddenly fell silent Wednesday and has remained off line.

The takedown of Rustock’s 26 command-and-control servers appears to be the result of a coordinated effort by longstanding anti-spamming groups, the most prominent of which is Spamhaus.org, according to cybersecurity blogger Brian Krebs, who broke the story.

Rustock’s control servers directed the activities of hundreds of thousands of infected PCs in homes and businesses, used primarily to deliver e-mail and social network messaging spam. Rustock is infamous for spreading ads for drugs from unlicensed online pharmacies.

Details of how the takedown was achieved are unclear; Rustock’s control servers were renowned for being nigh impregnable.

Rustock has been around for at least three years, and late last year had doubled its spam output over the previous year; in 2010, Rustock sent out more than 44 billion spam emails per day, accounting for as much as 48% of all spam, and had more than one million bots under its control, according to MessageLabs, Symantec’ messaging security division.

See also:
Rustock Botnet Flatlined with No Spam Activity
Notorious Spamming Botnet, Rustock, Takes a Fall
Rustock botnet’s operations disrupted
Major spam network silenced mid-campaign
Rustock botnet goes quiet again
The World’s Largest Spambot Network Goes Quiet
Prolific Spam Network Is Unplugged
Prolific Spam Network Is Unplugged
Rustock Botnet is Down, But Maybe Not Out
Rustock botnet

It still amazes me how the botnet spammers find hundreds of thousands of computers to infect. If everyone would just keep their software patches up to date, botnets wouldn’t be a problem in the first place. It’s like leaving the front door to your house wide open with a sign that says “burglars welcome”.

/one of the biggest upshots of the Rustock takedown is that if you want to buy Viagra or other erectile dysfunction drugs in the future, you’re going to have to go see your doctor, because the spam offers will hopefully no longer flood your email inbox