CALENDAR is malware used by APT1 that mimics legitimate Gmail Calendar traffic. [1]

ID: S0025
Platforms: Windows
Version: 1.2
Created: 31 May 2017
Last Modified: 30 March 2020

Techniques Used

Domain ID Name Use
Enterprise T1059 .003 Command and Scripting Interpreter: Windows Command Shell

CALENDAR has a command to run cmd.exe to execute commands.[2]

Enterprise T1102 .002 Web Service: Bidirectional Communication

The CALENDAR malware communicates through the use of events in Google Calendar.[1][2]

Groups That Use This Software

ID Name References
G0006 APT1