has signed  payloads with legally purchased code signing certificates.  has also digitally signed their phishing documents backdoors and other staging tools to bypass security controls.(Citation: FireEye CARBANAK June 2017)
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: has signed  payloads with legally purchased code signing certificates.  has also digitally signed their phishing documents backdoors and other staging tools to bypass security controls.(Citation: FireEye CARBANAK June 2017) ### Response: T1553.002.