Classic Russian webshell and one of the earliest full-featured PHP shells to circulate widely. Carries a W0rm supply-chain backdoor and a pre-auth local file inclusion on the very first line of source — the operator's tool is compromised before it even loads.

The workhorse of the Russian webshell scene — compact, battle-tested, zero authentication on default install, and carrying a W0rm supply-chain backdoor that gives a third party unauthenticated RCE on every host the operator compromises. Five independent attack surfaces. Highest severity in corpus.