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TerminalFix Campaign Uses PNG Steganography to Deploy Reverse Tunnel
- Engineer — Learn: PNG steganography as a payload delivery mechanism is a technique worth understanding for detection design, but there is no vulnerability to patch or misconfiguration to fix — no direct engineering action required today.
- SOC/IR — Act: IOCs for the steganographic PNG files have been published; sweep file transfer and web proxy logs for these IOCs and consider building a detection for suspicious outbound reverse tunnel activity paired with PNG downloads in multistage intrusion chains.
- Leader — Skip
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