Table of Contents



End Sort


  • Developing & Writeups

  • Defense Against/Identifying

  • Educational

    • From Kernel to VM
      • Description from stormeh on reddit( Although it's not directly a lecture about rootkit development, the topics discussed are very much of interest: hardware virtualization, page table and TLB manipulation, hypervisors and privilege levels below ring 0, etc. The speaker does also go on to mention how prior rootkits such as Blue Pill and Shadow Walker leveraged these features, as well as defensive technologies such as PaX.
      • Slides
  • Samples

    • GPU
    • Android
    • FreeBSD
    • Linux
    • OS X
    • Physical
      • Implementation and Implications of a Stealth Hard-Drive Backdoor
        • Modern workstations and servers implicitly trust hard disks to act as well-behaved block devices. This paper analyzes the catastrophic loss of security that occurs when hard disks are not trustworthy. First, we show that it is possible to compromise the firmware of a commercial over-the-shelf hard drive, by resorting only to public information and reverse engineering. Using such a compromised firmware, we present a stealth rootkit that replaces arbitrary blocks from the disk while they are written, providing a data replacement back- door . The measured performance overhead of the compromised disk drive is less than 1% compared with a normal, non-malicious disk drive. We then demonstrate that a re- mote attacker can even establish a communication channel with a compromised disk to infiltrate commands and to ex-filtrate data. In our example, this channel is established over the Internet to an unmodified web server that relies on the compromised drive for its storage, passing through the original webserver, database server, database storage engine, filesystem driver, and block device driver. Additional experiments, performed in an emulated disk-drive environment, could automatically extract sensitive data such as /etc/shadow (or a secret key file) in less than a minute. This paper claims that the diffculty of implementing such an at- tack is not limited to the area of government cyber-warfare; rather, it is well within the reach of moderately funded criminals, botnet herders and academic researchers.
    • VM
    • Windows
      • HORSE PILL
        • Horse Pill is a PoC of a ramdisk based containerizing root kit. It resides inside the initrd, and prior to the actual init running, it puts it into a mount and pid namespace that allows it to run covert processes and covert storage. This also allows it run covert networking systems, such as dns tunnels.
      • WindowsRegistryRootkit
        • Kernel rootkit, that lives inside the Windows registry value data. By Oleksiuk Dmytro (aka Cr4sh)
        • Rootkit uses the zero day vulnerability in win32k.sys (buffer overflow in function win32k!bInitializeEUDC()) to get the execution at the OS startup.