I published the following diary on isc.sans.edu: “Malicious JavaScript Dropping Payload in the Registry“:
When we speak about “fileless” malware, it means that the malware does not use the standard filesystem to store temporary files or payloads. But they need to write data somewhere in the system for persistence or during the infection phase. If the filesystem is not used, the classic way to store data is to use the registry. Here is an example of a malicious JavaScript code that uses a temporary registry key to drop its payload (but it also drops files in a classic way)… [Read more]
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