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New SLEEPWALKER Backdoor Waits for One Crafted Packet, Then Runs Its Own Bytecode

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New SLEEPWALKER Backdoor Waits for One Crafted Packet, Then Runs Its Own Bytecode

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Correction

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threat intel

New SLEEPWALKER Backdoor Waits for One Crafted Packet, Then Runs Its Own Bytecode

A malware researcher has documented a previously unreported Windows backdoor called SLEEPWALKER that remains dormant until triggered by a specific network packet, at which point it executes commands in a custom 23-instruction bytecode language. The malware is delivered as an unsigned 64-bit DLL designed for side-loading.

Why it matters: Windows defenders need to monitor for DLL side-loading activity and unusual network patterns that might activate dormant backdoors in their environment.

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First seen by Cybersecurity Tracker

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Correction

Correction recorded as of .

threat intel

New SLEEPWALKER Backdoor Waits for One Crafted Packet, Then Runs Its Own Bytecode

A malware researcher has documented a previously unreported Windows backdoor called SLEEPWALKER that remains dormant until triggered by a specific network packet, at which point it executes commands in a custom 23-instruction bytecode language. The malware is delivered as an unsigned 64-bit DLL designed for side-loading.

Why it matters: Windows defenders need to monitor for DLL side-loading activity and unusual network patterns that might activate dormant backdoors in their environment.

VendorsMicrosoft
Source published
First seen by Cybersecurity Tracker

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