TROJ_VB.JDJ
Trojan:Win32/Meredrop (Microsoft); [00047540.EXE]:Generic Downloader.x!dzb (McAfee); Trojan.Gen (Symantec); Trojan.Win32.VB.advg, Trojan.Win32.VB.advg (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Worm.Generic.343773 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan 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
520,192 bytes
EXE
No
08 Nov 2011
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This Trojan creates the following folders:
- %System%\oobe\rule8
- %System%\oobe\rule8\files
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Other System Modifications
This Trojan 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\whatismyipaddress[1].htm
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\cmyip[1].htm
- %System%\oobe\nl.lnk
- %System%\oobe\rule8\files\csrss.exe
(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\KMIN
HKEY_LOCAL_MACHINE\Software\Microsoft\
K_O_G8\KMCounter
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\KMIN
ByUser = "Administrator"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
K_O_G8\KMIN
KMVer = "3.8"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
K_O_G8\KMIN
KMVerName = "KOG"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
K_O_G8\KMIN
KMState = "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 = "060158140A031F454908165A556744100E0C1C46616444150E1919580805190A18080C4549242B374655404D5240495A5567714406080C194B0319150E505A0A040F170C184F581B04030C1D0519455A0502190A0805110E0E4F467262510C111F011D46"
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 Trojan drops the following files:
- %System%\oobe\rule8\desktop.ini
- %System%\oobe\p1
- %System%\oobe\page
- %System%\restore\ranback.dll
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
This report is generated via an automated analysis system.
SOLUTION
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
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
- KMIN
- In HKEY_LOCAL_MACHINE\Software\Microsoft\K_O_G8
- KMCounter
- 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
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\KMIN
- ByUser = "Administrator"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\K_O_G8\KMIN
- KMVer = "3.8"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\K_O_G8\KMIN
- KMVerName = "KOG"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\K_O_G8\KMIN
- KMState = "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 = "060158140A031F454908165A556744100E0C1C46616444150E1919580805190A18080C4549242B374655404D5240495A5567714406080C194B0319150E505A0A040F170C184F581B04030C1D0519455A0502190A0805110E0E4F467262510C111F011D46"
- 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 folders
- %System%\oobe\rule8
- %System%\oobe\rule8\files
Step 5
Search and delete these components
- %System%\oobe\rule8\desktop.ini
- %System%\oobe\p1
- %System%\oobe\page
- %System%\restore\ranback.dll
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_VB.JDJ. 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 7
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\whatismyipaddress[1].htm
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\cmyip[1].htm
- %System%\oobe\nl.lnk
- %System%\oobe\rule8\files\csrss.exe
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