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Intelligence Briefings from the War on Spam

Archive for the ‘Cloudmark’ Category

Go Phish, for Bank Cards


Tuesday, February 25, 2014 by Tom Landesman

With the New Year, it appears SMS scammers in the U.S. have taken a renewed interest in bank and account phishing mobile users. In January alone, more than half of all SMS spam reported via the GSMA Spam Reporting Service within the US were phishing attempts. From targeting prepaid debit cards for Child Support Recipients […]

SMS Phishers Exploit Twilio and ow.ly to Steal Mobile Account Logins


Thursday, February 13, 2014 by Mike Acar

Via the GSMA Spam Reporting Service, we’ve been receiving reports of an SMS phishing attack aimed at the customers of several large mobile providers in the US. And in an unusual twist, the phishers are trying to evade anti-abuse services by showing their malicious content only to mobile users. More than a quarter of a million mobile users. The […]

Guatemalan scammers taking lessons from Nigeria?


Thursday, February 06, 2014 by Emmet Cassidy

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 […]

Will Yahoo Mail data be used for Phishing?


Friday, January 31, 2014 by Angela Knox

Yahoo Mail announced a security attack yesterday where they observed hackers had been logging into peoples’ Yahoo email accounts using usernames and passwords that appeared to come from a third party who had access to this information. A Yahoo news article said that “A malicious computer program armed with Yahoo Mail passwords and usernames apparently […]

The Underused Unsubscribe


Wednesday, January 08, 2014 by Andrew Conway

Feedback from users is an important part of Cloudmark’s spam filtering (along with spam traps, a policy engine, and other goodies.) Even with the best of spam filters, sometimes a new type of spam message makes it through to an end user’s inbox. However, if they are at one of our clients and they click […]

Snapchat Exploit Leads to 4.6 Million Exposed Records


Friday, January 03, 2014 by Tom Landesman

Snapchat may have had less than a happy New Year thanks to the authors of SnapchatDB.info. The site, released on December 31, features approximately 4.6 million Snapchat users’ username, phone number, and area-code-derived geographical region. These records were collected using an exploit published by Gibson Security who has been exploring the undocumented Snapchat API for […]

Ten Years of CAN-SPAM


Thursday, January 02, 2014 by Andrew Conway

January 1st, 2014 marked the 10th anniversary of the CAN-SPAM Act taking force in the US. This laid down rules for bulk emailing, and provided criminal penalties for breaking them. The act was widely criticized at the time, as it still permitted unsolicited bulk emailing so long as a prior business relationship existed. In fact, […]

The Authentication Arms Race


Wednesday, December 18, 2013 by Andrew Conway

At Cloudmark, we have long recognized that we are in an arms race against the spammers. Spammers are continually trying to come up with new techniques for getting through our spam filters, and we are constantly monitoring their activities and staying one step ahead. It seems that the same thing is now happening in the […]

SMS Spam Reports to 7726 Provide Evidence to Fine UK Spammer


Tuesday, December 17, 2013 by Andrew Conway

We are always happy to see legal action taken against spammers, so it was good to hear from the UK that one of the leading payday loan SMS spammers was facing a fine of £175,000 ($285,000) imposed by the Information Commissioner’s Office. We were even more pleased to see that much of the evidence for […]

Need Some Extra Cash for the Holidays?


Monday, December 09, 2013 by Andrew Conway

Please don’t try to make it with get rich quick schemes on the Internet. Work from home scams are a perennial form of email and SMS spam, making up about 4.5% of all the spam reports we see from the US (and 18% of all the spam reports that are really spam – more on […]


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