Newly SLEEPWALKER Backdoor Waits for One Crafted Packet, Then Runs Its Own Bytecode
Wed Aug 26 2026
Malware
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An independent malware researcher has documented a previously unreported Windows backdoor, dubbed SLEEPWALKER, that stays inert in memory until a specifically crafted network packet reaches the machine and then runs commands written in a 23-instruction language of its own design.
The sample is an unsigned 64-bit Windows dynamic-link library (DLL) of 59,904 bytes, built to be side-loaded into&