The emails of a new TorrentLocker campaign use Domain-based Message Authentication, Reporting and Conformance (DMARC) to avoid detection and collect data.
Cyber criminals are continuously improving the technique to spread malicious code and avoid detection systems. Recently security experts at Trend Micro noticed an improvement in the evasion techniques implemented by malware authors to spread the ransomware TorrentLocker.
The bad actors spread the malware through spam emails containing a link to the malware, in the last months the spammed messages were crafted to evade spam filters. A new analysis conducted by Trend Micro revealed that criminals behind TorrentLocker ransomware are using emails that are designed to pass spam filters and also collect information. The new TorrentLocker campaign reached the peak in December 2014, it has had a temporary decline in January to raise again in February.
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