For close to two years now, the Shlayer Trojan has been the most common threat on the macOS platform: in 2019, one in ten of our Mac security solutions encountered this malware at least once, and it accounts for almost 30% of all detections for this OS. The first specimens of this family fell into our hands back in February 2018, and we have since collected almost 32,000 different malicious samples of the Trojan and identified 143 C&C server domains.
The operation algorithm has changed little since Shlayer was first discovered, nor has its activity decreased much: the number of detections remains at the same level as in the first months after the malware was uncovered.
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Source: Kaspersky