Subscribe to RSS Feed

Cloudmark Blog

Intelligence Briefings from the War on Spam

Archive for the ‘SMS / Texting’ 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 […]

Cloudmark’s 2013 Annual Global Messaging Threat Report


Thursday, January 30, 2014 by Tom Landesman

As the Chinese New Year rings in the year of the Horse, we’re also excited to announce the release of our 2013 Annual Global Messaging Threat Report. Looking back at the year, we discuss the evolving realm of highly targeted, regional SMS spam campaigns, spammers’ preference for financial themes, Apple iMessage abuse, dramatic increases in […]

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 […]

Maryland Clinic Sends SMS Spam Promoting Obamacare Sign Up


Monday, December 23, 2013 by Andrew Conway

We recently reported on Obamacare related spam in email, but now we are seeing it in the SMS world. We’ve received a number of SMS spam reports to 7726 from Maryland area codes reporting messages like this. The affordable coverage deadline is DEC. 27. Enroll with an [REDACTED] Health specialist: www.[REDACTED].org/g We put your health […]

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 […]

Mobile Spam Trends Analysis for New York City


Friday, December 06, 2013 by Tom Landesman

Spammers are in a New York state of mind. The 917 area code was in the top 20 area codes that received the highest volume of spam this year. The volume of SMS spam peaked in September, with 917 hitting the 5th spot in the nation. The area code, which encompasses all five boroughs, beat […]

2014 Message Security Predictions


Wednesday, December 04, 2013 by Neil Cook

As many start-ups are teaching us, eyeballs and information are hot commodities. As online marketers branch out, mobile messaging, in particular SMS, as a communications channel is poised to become the next email — completely saturated with legitimate businesses looking to easily connect with and market to end-users. Marketing firms won’t be the only ones […]

Rise in iMessage spam related to Luxury Goods


Monday, December 02, 2013 by Mark Stemm

Over the weekend I received my first iMessage spam. Here’s a screenshot of the spam message: After asking around at Cloudmark, lots of other people also received a similar spam message, so we decided to look in Cloudmark’s Spam Reporting Service (SRS) to see if we could quantify the scope of the attack. The Spam […]


Learn More About Cloudmark:

Our Products
News and Events
Site Map  •  Privacy Policy  •  ©2002–2014 Cloudmark, Inc.