New Mistic Backdoor Linked to KongTuke in ClickFix and ModeloRAT Campaigns

New Mistic Backdoor Linked to KongTuke in ClickFix and ModeloRAT Campaigns Ravie LakshmananJun 25, 2026Initial Access Broker / Ransomware A new, stealthy backdoor named Mistic has been deployed as part of suspected financially motivated attacks aimed at multiple organizations spanning insurance, education, IT, and professional services sectors since April 2026. According to Symantec and Carbon Black's Threat Hunter Team, the backdoor, also tracked as MLTBackdoor, is said to be linked to an initial access broker (IAB) named KongTuke (aka 404 TDS, Chaya_002, LandUpdate808, TAG-124, and Woodgnat), and dropped along with ModeloRAT, a Python remote access trojan (RAT) previously attributed to the group. "The backdoor runs payloads in memory with no file written to disk and includes a kill switch that…