TrojanDownloader: Win32/ Cutwail. BS copies itself to c: \ documents and settings\ administrator\ pukazudavemd. This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. trojan downloader: win32/ cutwail. Microsoft Security Essentials discovered this trojan virus today and three times it said I needed to restart to clean.