➔
search
✕

WORM_VB.LGZ

June 18, 2013
 ALIASES:

Trojan:Win32/Sisron (Microsoft); W32/Renocide.gen.e (McAfee); Trojan.Adclicker (Symantec); Trojan-Downloader.Win32.VB.xdi, Trojan-Downloader.Win32.VB.xdi (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Gen:Variant.Kazy.15819 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

225,280 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

08 May 2012

Arrival Details

This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other System Modifications

This worm deletes the following files:

  • %Temporary Internet Files%\Content.IE5\2TPM8950\ip2location[1].htm
  • %Temporary Internet Files%\Content.IE5\SMCZPN4M\whatismyipaddress[1].htm
  • %Temporary Internet Files%\Content.IE5\X9QQH2D9\cmyip[1].htm
  • %Temporary Internet Files%\Content.IE5\4H9MXTT9\adversion8.blogspot[1].htm
  • %Temporary Internet Files%\Content.IE5\2TPM8950\cmyip[1].htm
  • %System%\oobe\nl.lnk

(Note: %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista and 7.. %System% is the Windows system folder, which is usually C:\Windows\System32.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
K_O_G8\KMFIX

HKEY_LOCAL_MACHINE\Software\Microsoft\
K_O_G8\KMCounter

HKEY_LOCAL_MACHINE\Software\Microsoft\
K_O_G8\KMIN

HKEY_LOCAL_MACHINE\Software\Microsoft\
K_O_G8\KMDest

HKEY_LOCAL_MACHINE\Software\Microsoft\
K_O_G8\KMSEC

HKEY_LOCAL_MACHINE\Software\Microsoft\
K_O_G8\KMFItemp

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
K_O_G8\KMFIX
Tstadmn = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
K_O_G8\KMCounter
Value = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
K_O_G8\KMCounter
Value = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
K_O_G8\KMIN
restart = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
K_O_G8\KMDest
cnt = "070C161F564F1D164953"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
K_O_G8\KMDest
cty = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
K_O_G8\KMSEC
Value = "2D3A42554B1158393D574655"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
KM_Path8 = "%SystemRoot%\system32\oobe\rule8\files\csrss.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
KM_Path7 = "SorryKamba"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
KM_Path4 = "SorryKamba"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
KM_Path3 = "SorryKamba"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
KM_Path2 = "SorryKamba"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
KM_Path = "SorryKamba"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer
NoDriveTypeAutoRun = "353431"

Dropping Routine

This worm drops the following files:

  • %System%\oobe\p1
  • %System%\oobe\page

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

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

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.

  • In HKEY_LOCAL_MACHINE\Software\Microsoft\K_O_G8
    • KMFIX
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\K_O_G8
    • KMCounter
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\K_O_G8
    • KMIN
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\K_O_G8
    • KMDest
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\K_O_G8
    • KMSEC
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\K_O_G8
    • KMFItemp
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
    • Run

Step 3

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\SOFTWARE\Microsoft\K_O_G8\KMFIX
    • Tstadmn = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\K_O_G8\KMCounter
    • Value = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\K_O_G8\KMCounter
    • Value = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\K_O_G8\KMIN
    • restart = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\K_O_G8\KMDest
    • cnt = "070C161F564F1D164953"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\K_O_G8\KMDest
    • cty = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\K_O_G8\KMSEC
    • Value = "2D3A42554B1158393D574655"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
    • KM_Path8 = "%SystemRoot%\system32\oobe\rule8\files\csrss.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
    • KM_Path7 = "SorryKamba"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
    • KM_Path4 = "SorryKamba"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
    • KM_Path3 = "SorryKamba"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
    • KM_Path2 = "SorryKamba"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
    • KM_Path = "SorryKamba"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer
    • NoDriveTypeAutoRun = "353431"

Step 4

Search and delete these components

[ Learn More ]
There may be some components that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %System%\oobe\p1
  • %System%\oobe\page

Step 5

Scan your computer with your Trend Micro product to delete files detected as WORM_VB.LGZ. 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.

Step 6

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %Temporary Internet Files%\Content.IE5\2TPM8950\ip2location[1].htm
  • %Temporary Internet Files%\Content.IE5\SMCZPN4M\whatismyipaddress[1].htm
  • %Temporary Internet Files%\Content.IE5\X9QQH2D9\cmyip[1].htm
  • %Temporary Internet Files%\Content.IE5\4H9MXTT9\adversion8.blogspot[1].htm
  • %Temporary Internet Files%\Content.IE5\2TPM8950\cmyip[1].htm
  • %System%\oobe\nl.lnk


Did this description help? Tell us how we did.