Cron.d payload write paired with bash -c /dev/tcp wrapper execution

Ibrahim Saud@tektrix

•updated 23 days ago•0•0•3

Detects the creation or modification of a file within the /etc/cron.d/ directory, followed shortly by a Bash process invocation using /dev/tcp redirection. This pattern is commonly used by attackers to achieve persistence via cron and establish reverse shells, bypassing potential limitations of default system shells that do not support /dev/tcp syntax.