W32/Sality.AA - Malware

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Full description

Virus:	W32/Sality.AA
Date discovered:	21/11/2008
Type:	File infector
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Medium
Damage Potential:	Medium to high
Static file:	No
IVDF version:	7.00.00.101
Engine version:	8.2.0.35

General Methods of propagation:
   • Local network
   • Mapped network drives

Aliases:
   • Mcafee: W32/Sality.gen virus
   • Kaspersky: Virus.Win32.Sality.aa
   • F-Secure: Virus.Win32.Sality.aa
   • Eset: Win32/Sality.NAU virus
   • Bitdefender: Win32.Sality.OG

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Lowers security settings
   • Registry modification

Registry The following registry key is added:

– [HKLM\SOFTWARE\Microsoft\Security Center\Svc]
   • "AntiVirusOverride"=dword:00000001
   • "AntiVirusDisableNotify"=dword:00000001
   • "FirewallDisableNotify"=dword:00000001
   • "FirewallOverride"=dword:00000001
   • "UpdatesDisableNotify"=dword:00000001
   • "UacDisableNotify"=dword:00000001

The following registry keys are changed:

Various Explorer settings:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   Old value:
   • "Hidden"=dword:00000001
   New value:
   • "Hidden"=dword:00000002

Deactivate Windows XP Firewall:
– [HKLM\SOFTWARE\Microsoft\Security Center]
   Old value:
   • "AntiVirusDisableNotify"=dword:00000000
   • "FirewallDisableNotify"=dword:00000000
   • "UpdatesDisableNotify"=dword:00000000
   • "AntiVirusOverride"=dword:00000000
   • "FirewallOverride"=dword:00000000
   • "UacDisableNotify"=dword:00000000
   New value:
   • "AntiVirusDisableNotify"=dword:00000001
   • "FirewallDisableNotify"=dword:00000001
   • "UpdatesDisableNotify"=dword:00000001
   • "AntiVirusOverride"=dword:00000001
   • "FirewallOverride"=dword:00000001
   • "UacDisableNotify"=dword:00000001

Disable Regedit and Task Manager:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\policies\system]
   Old value:
   • "DisableTaskMgr"=dword:00000000
   • "DisableRegistryTools"=dword:00000000
   New value:
   • "DisableTaskMgr"=dword:00000001
   • "DisableRegistryTools"=dword:00000001

File infection Method:
This memory-resistent infector remains active in memory.

The following files are infected:
By file type:
• *.EXE

See a brief description here.

Inserted by Viktor Graeber on Thu, 06 Aug 2009 09:09 (GMT+1)
Updated by Andrei Gherman on Wed, 16 Dec 2009 09:32 (GMT+1)

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W32/Sality.AA - Malware

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