Major Virus guards detecting the ExcelDna.xll as MSIL/TrojanDropper.Agent.FGU and deleting!

The ExcelDna.xll file is being detected as a trojan "MSIL/TrojanDropper.Agent.FGU" and is being automatically deleted. It is also known as (In other Anitivirus):

ALYac | Trojan.PSW.Vidar
Zillya | Trojan.Crypt.Win32.60233
Alibaba | Trojan:MSIL/Generic.7ad4aa78
K7GW | Trojan ( 005807221 )
K7AntiVirus | Trojan ( 005807221 )
Cyren | W64/Agent.EMVH-0113
Symantec | Trojan.Gen.MBT
ESET-NOD32 | a variant of MSIL/TrojanDropper.Agent.FGU
Avast | Win64:Malware-gen
Kaspersky | HEUR:Trojan.MSIL.Agent.gen
BitDefender | Trojan.GenericKD.37347657
MicroWorld-eScan | Trojan.GenericKD.37347657
Tencent | Msil.Trojan.Agent.Lknh
Ad-Aware | Trojan.GenericKD.37347657
Sophos | Troj/MDrop-JJM
TrendMicro | TROJ_FRS.0NA103H521
FireEye | Trojan.GenericKD.37347657
Emsisoft | Trojan.GenericKD.37347657 (B)
Jiangmin | Trojan.MSIL.aeqed
Webroot | W32.Trojan.Gen
Kingsoft | Win32.Troj.Undef.(kcloud)
Microsoft | Trojan:Win32/Wacatac.B!ml
Gridinsoft | Trojan.Win64.Agent.oa!s1
GData | Trojan.GenericKD.37347657
AhnLab-V3 | Trojan/Win.Generic.C4580409
McAfee | Artemis!A719B4A9D085
MAX | malware (ai score=82)
TrendMicro-HouseCall | TROJ_FRS.0NA103H521
Yandex | Trojan.DOTHETUK!59xMQMvn7qc
Ikarus | Trojan-Spy.Vidar
Fortinet | W32/Agent!tr
AVG | Win64:Malware-gen
Qihoo-360 | Win64/Trojan.Generic.H8sACtsA

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