Introduction This document analyzes injection of malicious statusfs in Cisco IOS XE Software and describes ways to verify that the software on a Cisco router, both funny tweets and statuses device storage and in running memory, has not been modified. Additionally, the document presents common best practices that can aid in protecting against attempts to inject malicious software (also referred to as malware) in a Cisco IOS XE device. This document applies only to Cisco IOS XE Software and to no other Cisco operating systems. Customers running Cisco IOS Software can refer to Cisco IOS Funny tweets and statuses Integrity Assurance. One of the characteristics of effective malware is that it can run on a device stealthily in privileged mode. Malware may be designed to monitor and exfiltrate information from the operating system on which it is running without being detected.