eBPF – Running sandboxed programs in a privileged context such as OS kernel

• pamspy

  12 1,106 0.0 C

  Credentials Dumper for Linux using eBPF

This is a good write-up and I like the diagrams. What appears to still be missing in an "off switch". AFAIK there are still no kernel boot time commands to disable eBPF entirely. I have to recompile the kernel to disable it.

eBPF has the potential for file-less malware to run hidden from detection and I foresee the ability to tickle ring -3 (and -4?) CPU within CPU functions while bypassing local firewalls.

Here is some example code of what people already know how to do today and this list will grow as people discover more capabilities. [1][2][3][4][5] These do require some privileges to insert but will remain running and hidden until reboot.

[1] - https://github.com/citronneur/pamspy

[2] - https://github.com/h3xduck/TripleCross

[3] - https://github.com/krisnova/boopkit

[4] - https://github.com/pathtofile/bad-bpf

[5] - https://doublepulsar.com/bpfdoor-an-active-chinese-global-su...

• TripleCross

  11 1,677 0.7 C

  A Linux eBPF rootkit with a backdoor, C2, library injection, execution hijacking, persistence and stealth capabilities.

This is a good write-up and I like the diagrams. What appears to still be missing in an "off switch". AFAIK there are still no kernel boot time commands to disable eBPF entirely. I have to recompile the kernel to disable it.

eBPF has the potential for file-less malware to run hidden from detection and I foresee the ability to tickle ring -3 (and -4?) CPU within CPU functions while bypassing local firewalls.

Here is some example code of what people already know how to do today and this list will grow as people discover more capabilities. [1][2][3][4][5] These do require some privileges to insert but will remain running and hidden until reboot.

[1] - https://github.com/citronneur/pamspy

[2] - https://github.com/h3xduck/TripleCross

[3] - https://github.com/krisnova/boopkit

[4] - https://github.com/pathtofile/bad-bpf

[5] - https://doublepulsar.com/bpfdoor-an-active-chinese-global-su...

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• boopkit

  10 1,506 1.5 C

  Linux eBPF backdoor over TCP. Spawn reverse shells, RCE, on prior privileged access. Less Honkin, More Tonkin.

This is a good write-up and I like the diagrams. What appears to still be missing in an "off switch". AFAIK there are still no kernel boot time commands to disable eBPF entirely. I have to recompile the kernel to disable it.

eBPF has the potential for file-less malware to run hidden from detection and I foresee the ability to tickle ring -3 (and -4?) CPU within CPU functions while bypassing local firewalls.

Here is some example code of what people already know how to do today and this list will grow as people discover more capabilities. [1][2][3][4][5] These do require some privileges to insert but will remain running and hidden until reboot.

[1] - https://github.com/citronneur/pamspy

[2] - https://github.com/h3xduck/TripleCross

[3] - https://github.com/krisnova/boopkit

[4] - https://github.com/pathtofile/bad-bpf

[5] - https://doublepulsar.com/bpfdoor-an-active-chinese-global-su...

• bad-bpf

  5 482 0.0 C

  A collection of eBPF programs demonstrating bad behavior, presented at DEF CON 29

This is a good write-up and I like the diagrams. What appears to still be missing in an "off switch". AFAIK there are still no kernel boot time commands to disable eBPF entirely. I have to recompile the kernel to disable it.

eBPF has the potential for file-less malware to run hidden from detection and I foresee the ability to tickle ring -3 (and -4?) CPU within CPU functions while bypassing local firewalls.

Here is some example code of what people already know how to do today and this list will grow as people discover more capabilities. [1][2][3][4][5] These do require some privileges to insert but will remain running and hidden until reboot.

[1] - https://github.com/citronneur/pamspy

[2] - https://github.com/h3xduck/TripleCross

[3] - https://github.com/krisnova/boopkit

[4] - https://github.com/pathtofile/bad-bpf

[5] - https://doublepulsar.com/bpfdoor-an-active-chinese-global-su...

• falco

  42 6,895 9.8 C++

  Cloud Native Runtime Security

  

• systemd

  510 12,457 10.0 C

  The systemd System and Service Manager

  

```

https://github.com/systemd/systemd/blob/c76691d708ac7fe13b7c...

Unfortunately, most of the programs loaded by systemd are more-or-less hand-generated (the ingress/egress programs specifically) and do not include this information.

It's a surprisingly small group of folks who work in this space upstream, but I know that they're aware of this as an opportunity to improve things :)

Suggest a related project