The new tactic used by Emotet allows the malware to infect nearby insecure Wi-Fi networks – and their devices – via brute force loops.
A newly uncovered Emotet malware sample has the ability to spread to insecure Wi-Fi networks that are located nearby to an infected device.
If the malware can spread to these nearby Wi-Fi networks, it then attempts to infect devices connected to them — a tactic that can rapidly escalate Emotet’s spread, said researchers. The new development is particularly dangerous for the already-prevalent Emotet malware, which since its return in September has taken on new evasion and social engineering tactics to steal credentials and spread trojans to victims (like the United Nations) .
“With this newly discovered loader-type used by Emotet, a new threat vector is introduced to Emotet’s capabilities,” said James Quinn, threat researcher and malware analyst for Binary Defense, in a Friday analysis. “Previously thought to only spread through malspam and infected networks, Emotet can use this loader-type to spread through nearby wireless networks if the networks use insecure passwords.”
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