Malware
Yunsip
W32/Yunsip!tr.pws is classified as a password stealing trojan.
Yunsip is a Windows malware family.
Background
W32/Yunsip!tr.pws is categorized as a password-stealing trojan. Such trojans scan the compromised host for stored passwords and transmit them back to the attacker.
Source: Malpedia (Fraunhofer FKIE).