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ThreatExpert's Statistics for Backdoor.DSNX [Symantec]:

Backdoor.DSNX [Symantec] is also known as:
Threat AliasNumber of Incidents
Backdoor.DSNX.A [PC Tools]1
Backdoor.Win32.DSNX.05.a [Kaspersky Lab]1
BackDoor-UK.gen [McAfee]1
BKDR_DSNX.A [Trend Micro]1

Backdoor.DSNX [Symantec] has the following possible country of origin:
OriginNumber of Incidents
China1