botnet

Mon
02
Apr
Dennis Faas's picture

Kelihos Cybercriminals Outsmart Security Experts

Security experts at Kaspersky Lab, one of the leading anti-virus and computer security firms, recently announced they were able to take control of a hacker-built botnet containing more than 100,000 compromised computers. Unfortunately, less than 24 ... hours after the successful takedown, Kelihos, the cybercriminal gang behind the botnet, has already started building a new, large-scale collection of compromised computers to replace the one taken down. To stop the initial botnet, Kaspersky specialists used a method called "sinkholing." This technique involves direct infiltration of the botnet's ... (view more)

Fri
07
Oct
Dennis Faas's picture

Security Officials Unsure What to Make of Massive Botnet Army

Security officials have discovered a new botnet of infected computers capable of tremendous online destruction. Computers around the world have become infected in droves thanks to a steady stream of malicious email attachments that have continued to ... be released on a daily basis since August. At its most volatile, a record high 25 billion malicious attachments were sent out in a single day in August, alone. Botnet Delivers Altered Scam Those responsible for the attacks have had to alter their deceitful strategies several times to expand their list of victims. The first wave of malicious emails ... (view more)

Wed
20
Jul
Dennis Faas's picture

Microsoft Offers $250K Bounty for Spambot Gang

Microsoft is offering a $250,000 reward for information regarding the owners of the Rustock spam botnet , despite the fact the it has already been neutralized. Rustock at one point infected an estimated one million computers. Those behind it used ... the network to send as many as 30 million spam messages a day, most commonly selling counterfeit drugs. (Source: latimes.com ) Although the botnet has been brought under control, there's still a threat because its creators remain at large. As a result, Microsoft has issued a bounty. The reward is $250,000 and will be paid to anyone who provides "new ... (view more)

Thu
07
Jul
Dennis Faas's picture

New 'Indestructible' TDL Botnet Infects 4.5M PCs

Around 4.5 million computers have been caught in a botnet that some experts are calling as good as indestructible. Others, however, say that's an exaggeration. The botnet in question is named the TDL-4. In many senses, it's like any other botnet: ... once a computer becomes infected with malicious software, it is now controlled by remote and used for nefarious purposes. Many times the zombie PCs in a botnet (also known as a " botnet army ") are used to send bogus page requests to websites in an attempt to knock them offline --; referred to as a " denial of service attack ", or ... (view more)

Mon
27
Jun
Dennis Faas's picture

FBI Takes Down Infamous Coreflood Botnet

The Federal Bureau of Investigation (FBI) has made two announcements about successful operations against online bandits. The first is a near-complete takedown of a widespread virus, while the second is a series of arrests and seizures relating to ... two separate cybercrime gangs responsible for scareware scams. The virus in question had allowed criminals to set up a botnet . In short, a botnet is a large network of virus-infected PCs which is remotely controlled by one or a few individuals. The infected PCs are typically used to attack websites, send spam (unsolicited bulk email) to users around ... (view more)

Mon
18
Apr
Dennis Faas's picture

Infected Windows PCs Steal $100M; Feds Mollify Botnet

The FBI and Justice Department have shut down a network of infected Windows machines used for stealing money. The 'Coreflood' botnet was one of the largest and most longstanding networks of its type. Despite the network shutdown, the malicious ... software used to infect PCs remains in the wild. Over 2 Million PCs Infected with Malicious Software The botnet at one point held control over two million PCs which were infected by malicious software, often downloaded unknowingly by users online the Internet. The malicious software (also known as "malware") easily penetrated Windows defenses ... (view more)

Thu
24
Feb
Dennis Faas's picture

Grad Students Theorize on How to Crash Internet

A computer science graduate student and his friends claim to have found a way to use distributed denial of service (DDoS) attacks to take down large gateways of the Internet -- an act never before thought possible. The method, referred to as the ... "Coordinated Cross Plane Session Termination (CXPST) Attack," would require approximately 250,000 personal computers to target the Border Gateway Protocol (BGP) network routers in the attack. This style of coordinated denial of service attack is referred to as utilizing botnet , or a virtual "robot" network of computers under the control of ... (view more)

Tue
11
Jan
Dennis Faas's picture

Major Spam Botnet Takes Unexplained Xmas Vacation

Security experts are trying to work out why the amount of spam (unsolicited bulk email) distributed worldwide fell dramatically towards the end of 2010. That said, they also suspect it's a situation that won't last long. Post-Christmas Spam a ... Fraction of Summer Totals Security firm Symantec estimates that in August the number of bogus emails sent daily was around 200 billion. Surprisingly, that number slipped dramatically to 110 billion by October, was just 70 billion in late December, and collapsed after Christmas to around 30 billion. (Source: symantec.com ) If you're staggered by talk of ... (view more)

Wed
08
Dec
Dennis Faas's picture

Symantec: File-Sharing, Social Web Target PCs for Spam Botnets

While it is no secret that spam and botnet attacks are becoming more sophisticated with each passing day, there are a number of advanced security software programs that have been able to effectively combat malware in most of its forms. In spite of ... these positive strides, Symantec recently revealed new information that suggests botnets are adapting new methods of attacking computers. In short, a botnet is a jargon term used to describe a network of computers under the control of 1 (or few) users. For example, a PC can become part of a botnet when the primary user inadvertently download and ... (view more)

Mon
22
Nov
Dennis Faas's picture

Zombie PC Network Takedowns Drop Spam 47% in Q3: Report

The worldwide volume of spam has decreased in the third quarter of this year, thanks in large part to the mass shutdowns of some major botnet systems . In their latest reports, security software companies Symantec and Kaspersky have found that spam ... volumes decreased 47 percent compared to August figures. Botnets are formed when (for example) malicious software is unknowingly installed on an MS Windows PC. That PC then becomes part of a "zombie network" of infected systems which are then used to propagate spam email messages. Kaspersky weighed in on the correlation between legitimate ... (view more)

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