Malware
xPack
aka NERAPACK
Symantec describes this as a decryptor/loader used by Chinese threat actor Antlion in campaigns targeting Taiwan.
xPack, also known as NERAPACK, is a Windows malware family operated by Antlion and Pirate Panda.
Background
Symantec has characterized xPack as a loader/decryptor leveraged by the Chinese threat group Antlion during operations aimed at Taiwanese targets.
Source: Malpedia (Fraunhofer FKIE).