In this article we will learn about the infamous C99 shell. Unsurprisingly, the C99 shell often assist in retrieving sensitive data which ultimately may lead to personally identifiable information being compromised by malicious. The C99 backdoor PHP shell, like many web shells out there, is commonly used by black hat hackers, hacktivists, cybercriminals, and other cyber actors for malicious purposes.newly-created webshell software incorporates portions of code derived from seminal shells such as c99 and r57, they are able to disguise this by making extensive use of.
