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Update rkduck.md

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Ilya V. Matveychikov 2018-07-04 13:49:08 +04:00 committed by GitHub
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@ -57,3 +57,17 @@ Hooking of system calls by patching syscall-handlers in `sys_call_table[]`:
- https://github.com/linux-rootkits/rkduck/blob/master/rkduck/vfs.c#L157 (vfs_hijacked_proc_iterate)
- https://github.com/linux-rootkits/rkduck/blob/master/rkduck/vfs.c#L78 (vfs_hijacked_proc_filldir)
## Keylogger
Keylogger is implemented using `register_keyboard_notifier()`:
- https://github.com/linux-rootkits/rkduck/blob/master/rkduck/keylogger.c#L204
- https://github.com/linux-rootkits/rkduck/blob/master/rkduck/keylogger.c#L72 (keylogger_notify)
Logged keystrokes are saved in file which periodically being sent to remote hos using `scp`:
- https://github.com/linux-rootkits/rkduck/blob/master/rkduck/keylogger.c#L181 (keylogger_init)
- https://github.com/linux-rootkits/rkduck/blob/master/rkduck/keylogger.c#L64 (writing to the file...)
- https://github.com/linux-rootkits/rkduck/blob/master/rkduck/keylogger.c#L32 (sending with `scp`)
## Backdoor
...