ExtraBed is a 64-bit Linux ELF binary designed as a post-exploitation module for Cisco ASA devices. It typically works alongside other leaked tools like EPICBANANA to achieve persistence and administrative access by hooking functions in the ASA's lina process. Authoritative Technical Resources

For comprehensive analysis of , a malware component famously leaked by the Shadow Brokers, you should look for research papers and technical reports focusing on Cisco ASA (Adaptive Security Appliance) exploits .

While academic "papers" specifically titled "ExtraBed.rar" are rare (as the name refers to the leaked file itself), the following industry-standard reports provide the depth you are likely seeking:

: How it intercepts calls to auth_func to allow any password for a specific user.

: Detailed behavioral reports can be found on sites like Joe Sandbox or Any.Run . These provide a breakdown of the binary's execution flow, including its use of specific system calls to hijack device memory.

: Cisco Talos released a detailed Technical Analysis of Shadow Brokers Exploits, which covers how ExtraBed acts as an installable backdoor module to manipulate the ASA's configuration and authentication logic.