Black Hat Bash

10 PERSISTENCE

By gaining persistence on compromised networks and machines, we can make our access immune to environmental changes such as system reboots, a loss of network connectivity, or even credential rotation.

There are many ways to gain persistence. For example, you could plant code on a compromised server that reestablishes your access. Or you could discover virtual private network credentials in a configuration file on GitHub that someone accidentally pushed to a public repository to connect remotely to a network.

Bash is a useful tool for gaining persistence, and in this chapter, we’ll use it in several persistence techniques: modifying ...