Netskope Threat Labs

TurtleLoader

ATP Sandbox Adv. Heuristics

TurtleLoader is a loader written in C that researchers have tracked since 2022 delivering payloads such as QakBot, SquirrelWaffle, and ransomware tooling through phishing lures. It runs obfuscated code to hamper analysis, and its operators have used it as an early stage in intrusion chains that end in extortion.

First seen
March 2022
Last seen
October 2026
Alert Name
ByteCode-MSIL.Backdoor.TurtleLoader
ByteCode-MSIL.Trojan.TurtleLoader
Document-XML.Backdoor.TurtleLoader
Script.Backdoor.TurtleLoader
Win32.Trojan.TurtleLoader
Win64.Backdoor.TurtleLoader
Win64.Trojan.TurtleLoader