Threat Intelligence

Abusive Anti-Anti-Spam Scheme a Dreadful Strategy

A new company called Blue Security purports to have an innovative approach to getting rid of spam. I don't think much of it. As I said to an Associated Press reporter: "It's the worst kind of vigilante approach," said John Levine, a board member with the Coalition Against Unsolicited Commercial E-mail. "Deliberate attacks against people's Web sites are illegal." more

Can We Stop IP Spoofing? A New Whitepaper Explores the Issues

In March 2013, Spamhaus was hit by a significant DDoS attack that made its services unavailable. The attack traffic reportedly peaked at 300Gbps with hundreds of millions of packets hitting network equipment on their way. In Q1 2015, Arbor Networks reported a 334Gbps attack targeting a network operator Asia. In the same quarter they also saw 25 attacks larger than 100Gbps globally. What is really frightening about this is that such attacks were relatively easy to mount. more

Domains Under the Most-Abused TLDs: Same Old DNS Abuse Trends?

While threat actors can use any domain across thousands of top-level domains (TLDs), they often have favorites. For instance, you may be familiar with Spamhaus's 10 most-abused TLDs for spamming. WhoisXML API researchers recently built on this list by analyzing 40,000 newly registered domains (NRDs) that sported some of the listed unreputable TLDs. We called this study "DNS Abuse Trends: Dissecting the Domains Under the Most-Abused TLDs." more

Phish-Proofing URLs in Email?

For those who've been living in an e-mail free cave for the past year, phishing has become a huge problem for banks. Every day I get dozens of urgent messages from a wide variety of banks telling me that I'd better confirm my account info pronto. ...Several people have been floating proposals to extend authentication schemes to the URLs in a mail message. A sender might declare that all of links in it are to its own domain, e.g., if the sender is bigbank.com, all of the links have to be to bigbank.com or maybe www.bigbank.com. Current path authentication schemes don't handle this, but it wouldn't be too hard to retrofit into SPF. ...So the question is, is it worth the effort to make all of the senders and URLs match up? more

The Internet of Stupid Things

In those circles where Internet prognostications abound and policy makers flock to hear grand visions of the future, we often hear about the boundless future represented by "The Internet of Things". This phrase encompasses some decades of the computing industry's transition from computers as esoteric piece of engineering affordable only by nations, to mainframes, desktops, laptops, handhelds, and now wrist computers. Where next? more

How to Track Online Malevolent Identities in the Act

Want to be a cybersleuth and track down hackers? It may sound ambitious considering that malevolent entities are extremely clever, and tracing them requires certain skills that may not be easy to build for the typical computer user. But then again, the best defense is offense. And learning the basics of sniffing out cybercriminals may not only be necessary nowadays, it has become essential for survival on the Web. So where can you begin? more

Anonymous Plans to Go After DNS Root Servers. What Will Be the US’s Response?

The other day on pastebin, snippets of an email conversation were posted with members of the hacking group Anonymous discussing plans to conduct DOS attacks against the Internet's root name servers... Going after the Internet's root servers is a very bold move by Anonymous. Whereas before they were "merely" breaking into companies that they believed were acting contra to the hacker ethic, going after the Internet infrastructure is another thing altogether. Why? more

Security Researchers are Warning About a New IoT Botnet Storm Brewing

A brand new botnet, dubbed ‘IoTroop’, is discovered evolving and recruiting IoT devices at a far greater pace and with more potential damage than the Mirai botnet of 2016. Researchers at the security firm, Check Point, are warning that "a massive Botnet is forming to create a cyber-storm that could take down the internet. ... Our research suggests we are now experiencing the calm before an even more powerful storm. The next cyber hurricane is about to come." more

Continued Threats from Malware

As part of my job, I manage an incident response team that was engaged by a significant organization in Georgia whose network was infected by the QBOT (a.k.a. QAKBOT) malware. The customer had been infected for over a year, several teams before ours had failed to solve the problem, and they continued to get reinfected by the malware when they thought they had eradicated it. Over time it had spread to more than 1,000 computers in their ecosystem stealing user credentials along the way. more

IDN Spoofing Solutions With Balance

Last week's tizzy about IDN (Internationalized Domain Name) spoofing was an interesting exercise in watching how people react to the unknown. The nearly-universal response to the problem that had been described in detail many years ago was "turn off IDNs" instead of "assume that the people who created IDNs knew about this, so let's do some research." The following is based on my thoughts this week. For those of you who are not familiar with my earlier work, I'm one of the authors of the IDN standards... more

Blacklisting Under Wrong Assumptions

If you analyze the relay of spam- and malware-containing email circulating on the Internet purely through your mail server logs (running the Unix command "tail"), a large proportion seem to come from Asia Pacific hosts, especially those from mainland China. Therefore, many less-experienced systems administrators have simply blocked the access from subnets of Chinese or Asian origin, effectively destroying the fabric of the Internet -- messaging. If administrators took pains to analyze these supposedly Asian spam messages by analyzing the full Internet headers, they would have realized that the Asian servers were merely used by the real spammers as open relays, or perhaps as zombie hosts previously infected with the mass mailing worms through the exploitation of operating system vulnerabilities.  more

How Do You Do Secure Bank Transactions on the Internet?

Banks love it when their customers do their transactions on line, since it is so much cheaper than when they use a bank-provided ATM, a phone call center, or, perish forbid, a live human teller. Customers like it too, since bank web sites are usually open 24/7, there's no line and no need to find a parking place. Unfortunately, crooks like on line banking too, since it offers the possibility of stealing lots of money. How can banks make their on line transactions more secure? more

History of SMTP

The following excerpt is from the Free Software Magazine, March 2005 Issue, written by Kirk Strauser. To read the entire article, you may download the magazine here [PDF]. Also thanks to Yakov Shafranovich for making us aware of this publication. "Spam has existed since at least 1978, when an eager DEC sales representative sent an announcement of a product demonstration to a couple hundred recipients. The resulting outcry was sufficient to dissuade most users from repeating the experiment. This changed in the late 1990s: millions of individuals discovered the internet and signed up for inexpensive personal accounts and advertisers found a large and willing audience in this new medium." more

Should a Domain Name Registrar Run from a PO Box?

In 2008 KnujOn published a report indicating that 70 ICANN accredited Registrars had no publicly disclosed business location. The fundamental problem was one of community trust and consumer faith. Registrars extend their legitimacy to their domain customers who then transact and communicate with the public. more

SIEM Alternatives; How Does OpenXDR Make Traditional SIEM Obsolete?

OpenXDR is one of the most cost-effective SIEM alternatives that help businesses detect and mitigate threats within hectic modern architectures. A single cyber incident impacts every aspect of a business -- from system downtime, revenue losses, and reputation damage to disrupted operations. more