Threat Group Cards: A Threat Actor Encyclopedia Archived: 2026-04-06 03:21:08 UTC Home > List all groups > List all tools > List all groups using tool Outlook Backdoor Tool: Outlook Backdoor Names Outlook Backdoor FACADE Category Malware Type Backdoor, Info stealer, Exfiltration Description (ESET) The Turla Outlook backdoor has two interesting functionalities. First, it steals emails by forwarding all outgoing emails to the attackers. It mainly targets Microsoft Outlook, a widely used mail client, but also targets The Bat!, a mail client very popular in Eastern Europe. Second, it uses email messages as a transport layer for its Command & Control (C&C) protocol. Data, such as files requested via a command of the backdoor, is exfiltrated in specially-crafted PDF documents attached to emails, and commands are also received in PDF attachments. Thus, its behavior is particularly stealthy. It is important to note that no vulnerabilities were used either in PDF readers nor in Outlook. What actually happens is that the malware is able to decode data from the PDF documents and interpret it as commands for the backdoor. Information Malpedia Last change to this tool card: 23 April 2020 Download this tool card in JSON format All groups using tool Outlook Backdoor Changed Name Country Observed APT groups https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=4deb4745-67e2-4865-ad95-c02d48c33726 Page 1 of 2 Turla, Waterbug, Venomous Bear 1996-2024   1 group listed (1 APT, 0 other, 0 unknown) Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=4deb4745-67e2-4865-ad95-c02d48c33726 https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=4deb4745-67e2-4865-ad95-c02d48c33726 Page 2 of 2