sys28.exe传到Norman上，分析结果如下，虽然报NO MALWARE(只能说Norman没查出来)，但看报告内容，明显是病毒无疑：
sys28.exe : Not detected by Sandbox (Signature: W32/Smalltroj.BPDH)
[ DetectionInfo ]
* Sandbox name: NO_MALWARE
* Signature name: W32/Smalltroj.BPDH
* Compressed: YES
* TLS hooks: NO
* Executable type: Application
* Executable file structure: OK
[ General information ]
* **Locates window "金山毒霸 [class #32770]" on desktop.找金山毒霸（怎么只找金山？）
[ Changes to filesystem ]
* Creates file C:\WINDOWS\SYSTEM32\del.bat.（释放文件）
[ Changes to registry ]（修改注册表）
* Creates key "HKLM\System\CurrentControlSet\Services\FC5B1166".
* Sets value "ImagePath"="C:\WINDOWS\SYSTEM32\16BF120E.EXE -k" in key "HKLM\System\CurrentControlSet\Services\FC5B1166".
* Sets value "DisplayName"="FC5B1166" in key "HKLM\System\CurrentControlSet\Services\FC5B1166".
* Sets value "Description"="C9C972BA" in key "HKLM\System\CurrentControlSet\Services\FC5B1166".
* Creates key "HKCU\Software\SYSTEM\CurrentControlSet\Services\FC5B1166".
* Sets value "Description"="C9C972BA" in key "HKCU\Software\SYSTEM\CurrentControlSet\Services\FC5B1166".
* Sets value "DisplayName"="FC5B1166" in key "HKCU\Software\SYSTEM\CurrentControlSet\Services\FC5B1166".
* Sets value "ErrorControl"="" in key "HKLM\System\CurrentControlSet\Services\FC5B1166".
* Sets value "ImagePath"="C:\WINDOWS\SYSTEM32\16BF120E.EXE -k" in key "HKCU\Software\SYSTEM\CurrentControlSet\Services\FC5B1166".
* Sets value "ObjectName"="LocalSystem" in key "HKLM\System\CurrentControlSet\Services\FC5B1166".
* Sets value "ObjectName"="LocalSystem" in key "HKCU\Software\SYSTEM\CurrentControlSet\Services\FC5B1166".
* Sets value "Start"="" in key "HKLM\System\CurrentControlSet\Services\FC5B1166".
* Sets value "Type"="" in key "HKLM\System\CurrentControlSet\Services\FC5B1166".
[ Process/window information ]
* Enumerates running processes.
* Attempts to access service "FC5B1166".
* Creates service "FC5B1166 (FC5B1166)" as "C:\WINDOWS\SYSTEM32\16BF120E.EXE -k".（创建一个服务）
[ Signature Scanning ]
* C:\WINDOWS\SYSTEM32\del.bat (97 bytes) : no signature detection.