All posts by Emmet Cassidy

A DNS cache-busting technique for DDOS-style attacks against Authoritative Name Servers

During the course of a recent analysis of DNS traffic at a customer site, I noticed a high volume of requests had been made for a relatively small set of domains. As it turned out, the traffic was part of an attack on the customer’s DNS infrastructure; however, the point of these requests was initially […]

Virus Bulletin 2014: Leaking data of the quantified self

Quantify yourself much?  Candid Wüest of Symantec gave a fascinating presentation on the lax security in various wearable devices at the 2014 Virus Bulletin conference in Seattle.  The so-called “quantifiable self” is a trend in gadgetry that most people will be aware of, if not necessarily by name.  Probably the most famous example is the […]

Guatemalan scammers taking lessons from Nigeria?

When it comes to exports and Guatemala, we generally think coffee. However, while poring over our Mobile messaging data, we discovered another Guatemalan export: Nigerian-style scam campaigns. Over the past two to three years, mobile phone users in the USA have been receiving SMS messages, originating in Guatemala, informing them that they have won a […]

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