You don't want this Sleepwalker backdoor on your Windows machine

New Windows malware lays dormant until a custom command activates it like a sleeper agent

Researcher Dominik Reichel found SLEEPWALKER, a silent malware implant disguised as ESET’s agentIt contains no malicious code, activates only after receiving crafted network signalsLikely a nation‑state project targeting specific victims; no active campaigns confirmed yetSecurity researchers discovered a new and rather unusual piece of malware. Most malware come with a built-in, pre-defined set of tools and features: system fingerprinting, netwo…

You don't want this Sleepwalker backdoor on your Windows machine

Like a sleeper cell awaiting activation, a never-before-seen Windows backdoor dubbed Sleepwalker waits silently in memory for one specifically crafted network packet to wake it up and deliver commands using the malware's 23-instruction language. The commands can do everything from running code directly in memory to moving data off the computer. Malware researcher Dominik Reichel discovered the passive backdoor, which also has its own command lan…

New Windows Backdoor Can Hide Silently Until Hackers Activate It

Security researchers have discovered a previously unknown Windows backdoor that can stay hidden inside an infected computer until an attacker sends it a secret network signal. The malware, called Sleepwalker, is particularly dangerous because it does not behave like typical malware. It does not regularly contact an attacker’s server or keep an obvious connection open. Instead, it quietly waits for a specially designed network packet before becom…