PHP malware is one of the most commom malicious code found on the internet, mostly because it is the leading server-side language used on websites, followed by ASP, Java, ColdFusion and Perl (source). In order to address this issue, our tools are capable ofdetecting and cleaning up malware that weren't collected yet, but meet a complex set of characteristics that are considered malicious.
This malware uses the strrev PHP function to obfuscate the name of functions commonly abused by malware coders.
Severity
HIGH