Malware
Anchor
Anchor is a sophisticated backdoor served as a module to a subset of TrickBot installations.
Anchor is a Windows malware family operated by WIZARD SPIDER.
Background
Anchor is an advanced backdoor delivered as a module to only a portion of TrickBot infections. Active since August 2018, it is reserved for high-profile targets rather than distributed broadly. Because its C2 communication mechanism closely mirrors that of early TrickBot, many researchers attribute it to the same developers.
Source: Malpedia (Fraunhofer FKIE).