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PHP Backdoor Obfuscated One Liner

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PHP Backdoor Obfuscated One Liner

In the past, I have explained how small one line PHP backdoors use obfuscation and strings of code in HTTP requests to pass attacker’s commands to backdoors. Today, I’ll highlight another similar injection example and describe some of the malicious behavior we’ve seen recently on compromised websites.

Obfuscated PHP Backdoor

Discovered by our Remediation team, this PHP backdoor variant uses a method to hide the create_function which requires the attacker to provide it in their request.

Continue reading PHP Backdoor Obfuscated One Liner at Sucuri Blog.