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ThreatExpert's awareness of the file "ntos.exe":

Across all ThreatExpert reports, the file "ntos.exe" was mostly identified as a threat.
File "ntos.exe" has the following statistics:
Total number of reports analysed611,932
Number of cases that involved the file "ntos.exe"2,045
Number of incidents when this file was found to be a threat1,510
Statistical volume of cases when "ntos.exe" was a threat74%
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Notes:
  • Please note that the name of the file should NOT be used to define if it is legitimate or not. Such determination can only be made by observing its dynamic behaviour.
  • In order to check a file, please submit it to ThreatExpert.
  • For a comprehensive pro-active protection against threats, please consider ThreatFire - our behavioral antivirus solution.
The file "ntos.exe" is known to be created under the following filenames:
%System%\ntos.exe
%Temp%\backups\ntos.exe
%Temp%\nt025c\ntos.exe
Notes:
  • %System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
  • %Temp% is a variable that refers to the temporary folder in the short path form. By default, this is C:\Documents and Settings\[UserName]\Local Settings\Temp\ (Windows NT/2000/XP).

The following threats are known to be associated with the file "ntos.exe":
Threat AliasNumber of Incidents
TrojanSpy.ZBot.Gen!Pac.3 [PC Tools]294
Spy-Agent.bw.gen.c [McAfee]256
Infostealer.Banker.C [Symantec]247
Cryp_Pai-5 [Trend Micro]213
TROJ_ZBOT.AB [Trend Micro]126
Trojan-Spy.Win32.Zbot.ajx [Kaspersky Lab]124
TSPY_BANKRYPT.X [Trend Micro]117
TrojanSpy.ZBot.Gen!Pac.4 [PC Tools]114
PWS-Zbot.gen.c [McAfee]85
PWS-Banker.gen.bw [McAfee]75
Spy-Agent.bw.gen.e [McAfee]73
Bloodhound.Unknown [Symantec]71
Spy-Agent.cj.gen [McAfee]67
Win32/IRCBot.worm.variant [AhnLab]67
Spy-Agent.bw [McAfee]55
TrojanSpy.Bancos.AAM [PC Tools]54
Trojan Horse [Symantec]51
TrojanSpy:Win32/Zbot.gen!C [Microsoft]51
Trojan-Spy.Win32.Zbot.anp [Ikarus]48
Trojan-Spy.Win32.Bancos.aam [Kaspersky Lab]47
Mal/EncPk-CZ [Sophos]44
PWS:Win32/Zbot.UO [Microsoft]36
Infostealer.Notos!gen [Symantec]35
Mal/Dropper-T [Sophos]35
Spy-Agent.bw.gen.b [McAfee]35
TSPY_BANKRYPT.N [Trend Micro]33
Packed.Win32.Tibs.dc [Kaspersky Lab]32
Troj/Zbot-L [Sophos]32
VirTool:Win32/DelfInject.gen!AC [Microsoft]31
Trojan-Spy.Win32.Bancos.aam [Ikarus]29
Trojan-Spy.Win32.Zbot.zr [Kaspersky Lab]29
Mal/Behav-045, Mal/Zbot-A [Sophos]26
Win-Trojan/Bancos.40960.Z [AhnLab]26
Mal/FakeVirPk-A [Sophos]25
Backdoor.Paproxy [Symantec]24
Infostealer [Symantec]24
PWS:Win32/Zbot.PK [Microsoft]24
Suspicious.MH690 [Symantec]23
Mal/Zbot-D [Sophos]19
Spy-Agent.bw.dr.gen [McAfee]19
TrojanSpy.ZBot.Gen.4 [PC Tools]19
Trojan.Win32.Zbot [Ikarus]18
Program:Win32/XPAntiVirus [Microsoft]16
PWS:Win32/Zbot.gen!E [Microsoft]16
Mal/EncPk-HP [Sophos]15
New Malware.co [McAfee]15
PWS:Win32/Zbot.gen!B [Microsoft]15
Spy-Agent.cj.gen.h [McAfee]15
Trojan:Win32/Zbot.BD [Microsoft]15
Cryp_Pai-1 [Trend Micro]14
Mal/TibsPak [Sophos]14
Mal/Zbot-A [Sophos]14
PWS:Win32/Zbot.gen!H [Microsoft]14
Trojan-Spy.Win32.Zbot [Ikarus]14
Spy-Agent.cj.gen.d [McAfee]13
Mal/Behav-191, Mal/Zbot-D [Sophos]11
Mal/EncPk-EQ [Sophos]11
PolyCrypt-Packed [McAfee]11
PWS:Win32/Zbot [Microsoft]11
FakeAlert-DA [McAfee]9
New Malware.bl [McAfee]9
Troj/FakeAle-LE [Sophos]9
TROJ_AGENT.WCK [Trend Micro]9
Trojan.Wsnpoem [Symantec]9
Trojan.Zbot [PC Tools]9
TrojanSpy.Bancos.CFK [PC Tools]9
New Malware.ix [McAfee]8
Packed.Win32.PolyCrypt.d [Kaspersky Lab]8
Trojan.Generic [PC Tools]8
Trojan.Zbot [Symantec]8
Trojan:Win32/Malagent [Microsoft]8
Trojan-PSW.Banker [PC Tools]8
Trojan-Spy.Win32.Zbot.dq [Kaspersky Lab]8
VirTool.Win32.DelfInject [Ikarus]8
Backdoor.Trojan [Symantec]7
Mal/EncPk-FS [Sophos]7
Troj/Zbot-BS [Sophos]7
Trojan.DR.Cimuz.Gen.1 [PC Tools]7
Trojan-Clicker.Win32.Klik [Ikarus]7
Trojan-Spy.Win32.Zbot.adj [Kaspersky Lab]7
W32/Virut.gen [McAfee]7
Downloader-BON [McAfee]6
Generic Dropper.bu [McAfee]6
Mal/EncPk-DB [Sophos]6
Mal/EncPk-IF [Sophos]6
Packed.Generic.47 [Symantec]6
Possible_Mlwr-22 [Trend Micro]6
PWS:Win32/Zbot.gen!G [Microsoft]6
Trojan.Win32.Winwebsec [Ikarus]6
TrojanSpy.Zbot.BM [PC Tools]6
TSPY_ZBOT.OJ [Trend Micro]6
Downloader.MisleadApp [Symantec]5
Generic Dropper.bw [McAfee]5
Mal/DlfInj-A [Sophos]5
Mal/EncPk-CZ, Mal/EncPk-EI [Sophos]5
Mal/EncPk-HH [Sophos]5
Mal/EncPk-HJ [Sophos]5
Mal/WaledPak-A [Sophos]5
New Malware.bx [McAfee]5
Packed.Win32.Krap.z [Kaspersky Lab]5