VERY IMPORTANT

Proofpoint first observed new malware named Latrodectus in late November 2023, employed in email campaigns. While Latrodectus usage declined in December 2023 and January 2024, it resurged in February and March 2024 campaigns. Initially distributed by threat actor TA577 but later adopted by TA578, Latrodectus is an emerging downloader with sandbox evasion capabilities. Although sharing similarities with IcedID, researchers confirmed Latrodectus as a new malware likely created by IcedID's developers, exhibiting infrastructure overlap with historic IcedID operations.