Re: How about importing yara into kernel space ?

2016-03-19 Thread Wesley Shields
If you are infected with a rootkit moving YARA into the kernel is not an answer since the rootkit has full access to muck around with YARA even if it is in the kernel. My recommendation is don't run YARA on a system which is potentially compromised with a rootkit like you describe. If the

Re: How about importing yara into kernel space ?

2016-03-18 Thread Wesley Shields
Not entirely true. The YARA VM does not run native instructions directly, so if you did manage to jump somewhere other than YARA instructions the VM would likely crash badly. If this can lead to arbitrary code execution, I have no idea. Jumps are not bad. BPF, which runs in the kernel, allows

Re: How about importing yara into kernel space ?

2016-03-18 Thread Shiv M
Yara rules with jump constructs would make it easy to get code execution in the kernel. On Fri, Mar 18, 2016 at 6:03 AM Wesley Shields wrote: > If you are infected with a rootkit moving YARA into the kernel is not an > answer since the rootkit has full access to muck around