Ransomware in itself poses a formidable threat for organizations. As a fileless threat, the risk is increased as it can more effectively evade detection. We discuss how Netwalker ransomware is deployed filelessly through reflective DLL injection.
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QNodeService is a new, undetected malware sample written in Node.js, which is an unusual choice for malware authors. The malware has functionality that enables it to download/upload/execute files, steal credentials from Chrome/Firefox browsers, and perform file management, among other things.
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We found a coinminer bundled with the legitimate installer of video conferencing app Zoom. Users who attempt to download the installer get more than what they bargain for as they instead download the AutoIt compiled malware Trojan.Win32.MOOZ.THCCABO.
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We dug deeper into the behavior of Geost, a trojan targetting Russian banks, by reverse engineering a sample of the malware. The trojan employed several layers of obfuscation, encryption, reflection, and injection of non-functional code segments that made it more difficult to reverse engineer.
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We found cyberespionage group TICK targeting critical systems and enterprises, attempting to steal information to benefit this APT group’s sponsor. In this research brief, we show the timeline of the group’s activities and malware development, as well as the technical analyses of the new malware families, modified tools, and upgraded malware routines.
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