Malwasm is a tool based on Cuckoo Sandbox available here.

Malwasm was designed to help people that do reverse engineering. Malwasm step by step:

• the malware to analyse is executed through Cuckoo Sandbox
• during the execution, malwasm logs all activites of the malware with pintool
• all activities are stored in a database (Postgres)
• a web service is available to visualize and manage the data stored in the database

Features

Malwasm provides these features:

• offline programs debugging
• possibility to go back or forward in the execution's time (with a time slide bar)
• states of registers and flags
• values of the stack/heap/data
• "Following dump" options
• fully works in the browser