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Threat Encyclopedia

TSPY_ZBOT.XMAS

ANALYSIS BY

jasperm


ALIASES:

Hbedv: TR/Kazy.3994.2; Rising: Packer.Win32.Agent.bk [Suspicious] ; FSecure: Gen:Variant.Kazy.3994

PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

OVERALL RISK RATING:
REPORTED INFECTION:
SYSTEM IMPACT RATING:
INFORMATION EXPOSURE:

  • Threat Type:Spyware

  • Destructiveness:No

  • Encrypted: Yes

  • In the wild: Yes

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Minimum Scan Engine:

8.900

VSAPI OPR PATTERN File:

7.721.00

VSAPI OPR PATTERN Date:

24 Dec 2010

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Remove the malware/grayware file that dropped/downloaded TSPY_ZBOT.XMAS

Step 3

Identify and delete files detected as TSPY_ZBOT.XMAS using either the Startup Disk or Recovery Console

[ Learn More ]

Step 4

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.


 
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
    • From: Userinit = "%System%\userinit.exe,%System%\sdra64.exe,"
      To: Userinit = "%System%\userinit.exe,"

Step 5

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.


  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
    • EnableFirewall = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Network
    • UID = "{computer name}_{random numbers}"

Step 6

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

  • In HKEY_USERS\.DEFAULT\Software\Microsoft
    • Protected Storage System Provider
  • In HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer
    • {43BF8CD1-C5D5-2230-7BB2-98F22C2B7DC6}
  • In HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer
    • {19127AD2-394B-70F5-C650-B97867BAA1F7}

Step 7

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %System%\lowsec

Step 8

Remove these strings added by the malware/grayware/spyware in the HOSTS file

[ Learn More ]
    127.0.0.1 downloads
    127.0.0.1 downloads
    127.0.0.1 downloads
    127.0.0.1 downloads
    127.0.0.1 downloads
    127.0.0.1 rads.mcaf
    127.0.0.1 liveupdat
    127.0.0.1 liveupdat
    127.0.0.1 liveupdat
    127.0.0.1 update.sy
    127.0.0.1 download7 
    127.0.0.1 download6 
    127.0.0.1 download5 
    127.0.0.1 download4 
    127.0.0.1 download3 
    127.0.0.1 download2 
    127.0.0.1 download1 
    127.0.0.1 avu.zonel
    127.0.0.1 retail.sp
    127.0.0.1 retail01.
    127.0.0.1 retail02.
    127.0.0.1 acs.panda
    127.0.0.1 pccreg.an
    127.0.0.1 dl1.antiv
    127.0.0.1 dl2.antiv
    127.0.0.1 dl3.antiv
    127.0.0.1 dl4.antiv
    127.0.0.1 fr.mcafee
    127.0.0.1 mcafee.co
    127.0.0.1 antivirus
    127.0.0.1 ftp.esafe
    127.0.0.1 ftp.europ
    127.0.0.1 ftp.syman
    127.0.0.1 us.mcafee
    127.0.0.1 security.
    127.0.0.1 download.
    127.0.0.1 shop.syma
    127.0.0.1 dispatch.
    127.0.0.1 f-secure.
    127.0.0.1 kaspersky
    127.0.0.1 mast.mcaf
    127.0.0.1 secure.na
    127.0.0.1 sophos.co
"

Step 9

Scan your computer with your Trend Micro product to delete files detected as TSPY_ZBOT.XMAS. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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