301. Qilin Abuses Cyberduck for Exfiltration

Hello everyone!

Let's talk about data exfiltration trends and ransomware. Modern ransomware attacks almost always involve this stage, so it's important to document tools they use to solve this task.

According to this report, Qilin ransomware affiliates often abuse Cyberduck for data exfiltration. It's a legitimate open source file transfer client that enables adversary to connect to remote servers and cloud storage services to upload, download, and manage files.

As always, we can build hunts based on executable's metadata, for example:

event_type: "processcreatewin"

AND

proc_file_productname: "cyberduck"

Also, we can look for resolving Cyberduck-related domains, for example:

event_type: "dnsreqwin"

AND

dns_rname: "cyberduck.io"

See you tomorrow!

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