10 January 2024 — 12 min read
CustomLoader: A malicious link
CustomerLoader was first spotted in June 2023, delivering different payloads to its targets. It is a .NET loader, so named from the ‘custom’ string in its C&C communication. In this campaign, it used a .LNK file to bring the DuckTail infostealer to victims' machines. DuckTail is a Vietnamese threat group that became active in May 2023. Using phishing job listings on LinkedIn, DuckTail delivers malicious files to victims.