.7z (a 7-Zip compressed archive), often protected with a password.

According to a joint cybersecurity advisory by the Cybersecurity and Infrastructure Security Agency (CISA) , this file is used by threat actors as part of "living off the land" (LotL) techniques. These techniques involve using legitimate system tools and files to blend in with normal network activity and avoid detection by security software. Key Characteristics

To protect against activity involving this artifact, organizations are encouraged to:

Forward Windows Event Logs to a hardened, segmented server to prevent actors from clearing their tracks.