Turla__2020__Turla_Crutch_Keeping_the_back_door_open_WeLiveSecurity.pdf

ESET researchers describe Crutch, a Turla backdoor framework used for espionage against targeted government networks, detailing versioned evolutions, payloads, and exfiltration to Dropbox, and linking Crutch to the Turla threat group while mapping its techniques and architecture across its lifecycle from 2015 to 2019.