Virus:TR/KillAV.HP.1
Date discovered:23/07/2010
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:445.448 Bytes
MD5 checksum:e5a53990412c9362916404980Ec30A61
IVDF version:7.10.09.217 - Monday, July 26, 2010

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Mcafee: W32/Xirtem@MM
   •  Kaspersky: P2P-Worm.Win32.BlackControl.a
   •  TrendMicro: WORM_PROLACO.AF
   •  F-Secure: Win32.Worm.Prolaco.P
   •  Sophos: Mal/CryptBox-A
   •  Bitdefender: Win32.Worm.Prolaco.P
   •  AVG: Agent2.AYXP
   •  Panda: W32/P2PShared.U
   •  PCTools: Malware.Ackantta
   •  Eset: Win32/Merond.AC
   •  GData: Win32.Worm.Prolaco.P
   •  AhnLab: Win-Trojan/Agent.445448.E
   •  DrWeb: Win32.HLLW.Autoruner.25095
   •  Fortinet: W32/Agent.3367!tr
   •  Ikarus: Worm.Win32.Prolaco


Platforms / OS:
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows Server 2008
   • Windows 7


Side effects:
   • Disable security applications
   • Drops malicious files
   • Lowers security settings
   • Registry modification

 Files It copies itself to the following location:
   • %SYSDIR%\HPWuSchd3.exe



The following file is created:

– %SYSDIR%\hp-4214.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: Worm/P2P.VCR

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "HP Software Update"="%SYSDIR%\HPWuSchd3.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "SBAMTray"=-
   • "sbamui"=-
   • "cctray"=-
   • "CAVRID"=-
   • "BDAgent"=-
   • "egui"=-
   • "avast!"=-
   • "AVG8_TRAY"=-
   • "ISTray"=-
   • "K7SystemTray"=-
   • "K7TSStart"=-
   • "SpIDerMail"=-
   • "DrWebScheduler"=-
   • "AVP"=-
   • "OfficeScanNT Monitor"=-
   • "SpamBlocker"=-
   • "Spam Blocker for Outlook Express"=-
   • "F-PROT Antivirus Tray application"=-
   • "RavTask"=-
   • "APVXDWIN"=-
   • "SCANINICIO"=-
   • "McENUI"=-
   • "MskAgentexe"=-
   • "Windows Defender"=-



It creates the following entry in order to bypass the Windows XP firewall:

– [HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\
   FirewallPolicy\StandardProfile\AuthorizedApplications\List]
   • "%SYSDIR%\HPWuSchd3.exe"="%SYSDIR%\HPWuSchd3.exe:*:Enabled:Explorer"



The following registry keys are added:

– [HKLM\Software\HP1]
– [HKCU\Software\HP1]


The following registry keys are changed:

Various Explorer settings:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer]
   New value:
   • "havlett"="03"
   • "puktard"="04"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system]
   Old value:
   • "EnableLUA"=dword:00000001
   New value:
   • "EnableLUA"=dword:00000000

– [HKLM\SOFTWARE\Microsoft\Security Center]
   Old value:
   • "UACDisableNotify"=dword:00000000
   New value:
   • "UACDisableNotify"=dword:00000001

Description inserted by Patrick Schoenherr on Monday, July 26, 2010
Description updated by Patrick Schoenherr on Monday, July 26, 2010

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