Last August , security researchers released a blog discussing a new ATM malware family called Ripper which they believe was involved in the recent ATM attacks in Thailand. Large numbers of ATMs were also temporarily shut down as a precautionary measure.
That analysis gave an overview of the techniques used by the malware, the fact that it targets three major ATM vendors, and compared Ripper to previous ATM malware families. Their analysis was based on the file with MD5 hash 15632224b7e5ca0ccb0a042daf2adc13. This file was uploaded to Virustotal by a user in Thailand on August 23.
During our analysis we noticed some additional details that where not called out, or which appear to contradict this earlier analysis. We highlight these differences in this blog post. We have also included technical indicators such as code offsets where possible for other researchers to follow on from our work.
In April of this year, Trend Micro’s Forward Looking Threat Research team and Europol EC3 collaborated on a comprehensive report on all ATM malware threats known at that point. We have been watching out for new families since then. The paper was made available to members of the Financial and Law Enforcement communities. If you are part of these industries, have not received a copy, and would like one, please contact Robert McArdle.