w32Babelloh virus

w32Babelloh virus
Discovered: December 5, 2007
Type: Worm
Infection Length: 51,576 bytes
Systems Affected: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Vista, Windows XP

Once executed, the worm creates the following mutex so only one instance of the worm is running:
NameOfMutexObject2

The worm creates the following files:

* %SystemDrive%\cblogsvr.ini
* %SystemDrive%\mgrShell.exe
* %SystemDrive%\spoolsv32.exe
* %SystemDrive%\wmiprvse.exe
* %Temp%\L4SD\1CE993C1.db
* %Temp%\~RHF514.log

It also creates the following files with hidden and system attributes on removable and mapped network media:

* %DriveLetter%:\RECYCLER
* %DriveLetter%:\autorun.inf
* %DriveLetter%:\RECYCLER\desktop.exe
* %DriveLetter%:\RECYCLER\desktop.ini

The worm may also copy and spread in encrypted form to local .doc, .docx and .ros documents as the following file:
%DriveLetter%:\RECYCLER\[8 HEXADECIMAL CHARACTERS].db

It creates the following registry entries, so that it runs every time when Windows starts:
* HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run\"PolicyRun" = "%SystemDrive%\spoolsv32.exe"
* HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"winmgmt" = "%SystemDrive%\wmiprvse.exe"
* HKEY_USERS\S-1-5-21-1961063573-973683775-492528769-500\Software\Microsoft\Windows
* \CurrentVersion\Run\"winmgmt" = "%SystemDrive%\wmiprvse.exe"
* HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\"Shell" = "Explorer.exe %SystemDrive%\spoolsv32.exe"
* HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\TrkWks\"ImagePath" = "%SystemDrive%\spoolsv32.exe"
* HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\TrkWks\"ImagePath" = "%SystemDrive%\spoolsv32.exe"
* HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TrkWks\"ImagePath" = "%SystemDrive%\spoolsv32.exe"

It modifies following values in registry subkeys:

* HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\"ServiceCurrent" = "11"
* HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\TrkWks\"Type" = "10"
* HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\"ServiceCurrent" = "11"
* HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TrkWks\"Type" = "10"
* HKEY_USERS\S-1-5-21-1961063573-973683775-492528769-500\Software\Microsoft\Windows
* \CurrentVersion\Explorer\Advanced\"ShowSuperHidden" = "0"
* HKEY_USERS\S-1-5-21-1961063573-973683775-492528769-500\Software\Microsoft\Windows
* \CurrentVersion\Policies\Explorer\"NoDriveTypeAutoRun" = "B5"

It checks for internet access by connecting to the following site:
windowsupdate.microsoft.com

The worm drops additional malware which opens a back door and attempts to connect with following predetermined sites on TCP ports 80, 8080 or 8088:

* lack.bpa.nu
* qack.bpa.nu
* pbwoman.6600.org

TANGISMU virus / Pulasi virus

Virus: Win32.VB.BG
Type: Trojan
In the wild: No
Reported Infections: Low
Distribution Potential: Low
Damage Potential: Low to medium
Static file: Yes
File size: 46.5 kb


Method of propagation:
• The malware spreads itself by creating "Autorun .inf" and a "dapat.exe" onto hard drive partitions,including removable media(eg flsh disk, memory card).
It hides the autorun.inf by changing its file attributes


Aliases:
• Kaspersky: Virus.Win32.VB.bg
• F-Secure: Virus.Win32.VB.bg
• Grisoft: Worm/VB.ZU
• Eset: Win32/VB.DA

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

Side effects:
• Drops files
• Lowers security settings
• Registry modification
• Eject itself to every file with the following extension dbf,jpg,dbs,mdb,doc and xls

Files It copies itself to the following locations:
• C:\pulasi.txt
• %SYSDIR%\"Sedihmu.inf"
• %SYSDIR%\pencaria\smss.exe
• %SYSDIR%\pencaria\services.exe
• %SYSDIR%\pencaria\lsass.exe
• %drive%\documents.exe
• %drive%\adalah\dapat.exe

It creates the following directory:
• %drive%\adalah

The following files are created:
– C:\pulasi.txt This is a non malicious text file with the following content:
• TANGISMU

M4k3 B3T3R L1V3 WITH VIRUS
H4T1KU B3T4P4 B3RS3DIH
benar - benar jau, tak kan dapat ku gapai
Tangisku bukan milikmu
Tangismu adalah milikku
tak ada lagi yang ku kejar saat ini
nant nanti aku mulai berkobar
saat,ini aku akan mulai mengejar yang
Aku terpaksa,lakukan ini krana kau yang mengawali..
4LL FR13ND 1NDU5TR14L C0MMUN1TY ENDON3SIA
SP3CI4L TH4NKS TO S4INT 4ND SINN3RS C0MMUN1TY
JOWAT FAMILY ENDONESIA

– %WINDIR%\msvbvm60.dll
– %SYSDIR%\msvbvm60.dll

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
•c:\pulasi.txt


The following registry keys are changed:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
Old value:
• "Shell"="Explorer.exe"
• "Userinit"="%SYSDIR%\userinit.exe"
New value:
• "System"="Explorer.exe "%SYSDIR%\pencaria\services.exe"
• "Userinit"="%SYSDIR%\Pencaria\lsass.exe"

– [HKCR\exefile]
Old value:
• @="Application"
New value:
• @="File"


– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AeDebug]
Old value:
• "Auto"="1"
• "Debugger"="drwtsn32 -p %ld -e %ld -g"
New value:
• "Auto"="1"
• "Debugger"="%SYSDIR%\pencaria\lsass.exe"

Various Explorer settings:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
Old value:
• "Hidden"=%user defined settings%
• "HideFileExt"=%user defined settings%
• "ShowSuperHidden"=%user defined settings%
New value:
• "Hidden"=dword:00000000
• "HideFileExt"=dword:00000001
• "ShowSuperHidden"=dword:00000000

– [HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot]
Old value:
• "AlternateShell"="cmd.exe"
New value:
• "AlternateShell"="%SYSDIR%\pencaria\lsass.exe"

– [HKCR\lnkfile\shell\open\command]
Old value:
• @=" "%1" %*"
New value:
• @=" "%SYSDIR%\pencaria\lsass.exe" "%1" %*"

– [HKCR\piffile\shell\open\command]
Old value:
• @=""%1" %*"
New value:
• @="%SYSDIR%\pencaria\lsass.exe"" "%1" %*"

– [HKCR\batfile\shell\open\command]
Old value:
• @=""%1" %*"
New value:
• @="%SYSDIR%\pencaria\lsass.exe" "%1" %*"

– [HKCR\comfile\shell\open\command]
Old value:
• @=""%1" %*"
New value:
• @="%SYSDIR%\pencaria\lsass.exe" "%1" %*"

Disable Regedit and Task Manager:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
Old value:
• "DisableCMD"=%user defined settings%
• "DisableTaskMgr"=%user defined settings%
• "DisableRegistryTools"=%user defined settings%
New value:
• "DisableCMD"=dword:00000001
• "DisableTaskMgr"=dword:00000001
• "DisableRegistryTools"=dword:00000001

Various Explorer settings:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
Old value:
• "NoFolderOptions"=%user defined settings%
New value:
• "NoFolderOptions"=dword:00000001

– [HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore]
Old value:
• "DisableConfig"=%user defined settings%
• "DisableSR"=%user defined settings%
New value:
• "DisableConfig"=dword:00000001
• "DisableSR"=dword:00000001

– [HKLM\SOFTWARE\Policies\Microsoft\Windows\Installer]
New value:
• "LimitSystemRestoreCheckpointing"=dword:00000001
• "DisableMSI"=dword:00000001

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\
CabinetState]
New value:
• "FullPathAddress"=dword:00000001

Process termination List of processes that are terminated:
• regedit.exe; AVP.exe; rtvscan.exe; NAV.exe; VSHWIN32.exe;
ProcessManager.exe; RegistryEditor.exe; Msiexec.exe; avgemc.exe;
nvcoas.exe; mcvsescn.exe; firefox.exe; TASKMGR.EXE; setup.exe;
Opera.exe; avguad.exe.; avgnt.exe; killvb.exe; Msi.exe
Processes with one of the following strings are terminated:
• ANT; BRO; VIR; TASK; REG; ASM; DBG; W32; BUG; HEX; DETEC; PROC; WALK;
REST; AVS; OPTIONS; AVG; SYMANTEC; PANDA; MCAFEE; PC-CILLIN; F-PROT;
KASPERSKY; VAKSIN; ANTI; VIRUS

Processes containing one of the following window titles are terminated:
• RegEdit_RegEdit
• Registry Editor
• Folder Options
• Local Settings

The following service is disabled:
• System Restore

Programming language:
•The malware program was written in Visual Basic.

Removal instruction

If your computer does not have an up-to-date antivirus, or does not have an antivirus solution at all, follow the instructions below to delete the malicious program:

1. Use Task Manager to terminate the virus process.
2. Delete the original virus file (the location will depend on how the program originally penetrated the victim machine).
3. change above new registry value to old value
4. Delete the following parameters from the system registry

   [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
   DisableTaskMgr = 1
   [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
   NoFolderOptions = 1
   [HKLM\SOFTWARE\Microsoft\Windows \CurrentVersion\run]
   "akhir" = "c:kiamat.txt"

5. 
   
6. Delete the following files:

   %System%\pencaria\csrss.exe
   %System%\pencaria\lsass.exe
   %System%\pencaria\services.exe
   %System%\pencaria\smss.exe
   %System%\"Sedihmu.inf"
   %drive%\My Profile.exe
   %drive%\adalah\dapat.exe
   %drive%\autorun.inf
   
   
   

7. Update your antivirus databases and perform a full scan of the computer

Be careful when editing the system registry. One incorrect change may result in the OS malfunctioning! Strictly follow the recommendations of experts when editing/changing the system registry!

Recommendations

We encourages all users and administrators to adhere to the following basic security "best practices":

• Turn off and remove unneeded services. By default, many operating systems install auxiliary services that are not critical, such as an FTP server, telnet, and a Web server. These services are avenues of attack. If they are removed, blended threats have less avenues of attack and you have fewer services to maintain through patch updates.
• If a blended threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
• Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services (for example, all Windows-based computers should have the current Service Pack installed.). Additionally, please apply any security updates that are mentioned in this writeup, in trusted Security Bulletins, or on vendor Web sites.
• Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
• Configure your email server to block or remove email that contains file attachments that are commonly used to spread viruses, such as .vbs, .bat, .exe, .pif and .scr files.
• Isolate infected computers quickly to prevent further compromising your organization. Perform a forensic analysis and restore the computers using trusted media.
• Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.

W32/Xiaoho.worm

W32/Xiaoho.worm
Risk Assessment
- Home Users: Low-Profiled
- Corporate Users: Low-Profiled
Origin: N/A
Length: Varies
Type: Virus
SubType: Worm

Virus Characteristics

This detection is for a worm which tries to copy itself to removable drives. It will destroy systems it's used on by infecting all .exe files and changing their icons to the Chinese character HAO.

Upon execution, the worm drops a copy of itself into the Windows System folder:

* %SysDir%\exloroe.exe

The worm creates the following registry keys to activate itself:

* HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{H9I12RB03-AB-B70-7-11d2-9CBD-0O00FS7AH6-9E2121BHJLK}\: "ϵͳÉèÖÃ"
* HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{H9I12RB03-AB-B70-7-11d2-9CBD-0O00FS7AH6-9E2121BHJLK}\stubpath: "%SystemRoot%\system32\exloroe.exe"

It spreads by dropping files named autorun.inf and xiaohao.exe on removable drives and setting file attributes as hidden.

The worm infects .exe files by overwriting them or corrupting them beyond repair. This changes their icon to Chinese word HAO.

and changes active window title as "X14o-H4o":

The file C:\Jilu.txt is created to list all the infected files.

The worm also infects .html, .htm, .asp and other script files by inserting iframe with a reference a remote URL.

It also changes system time to Jan 17, 2005 to try to disable antivirus programs.
Indications of Infection

* The infected files' icons change to be the Chinese character HAO.
* Active windows have their title changed to "X14o-H4o',27h,'s Virus"

Method of Infection
This worm may come via malicious link, or it may be spread by its intended method of infected removable drives.
Removal Instructions

All Users:

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

Additional Windows ME/XP removal considerations
Aliases
Virus.Win32.Agent.ai, Virus.Win32.Agent.o, W32.Hauxi, W32/Hoaix-A, W32/XiaoHao.A

W32/Checkout!91d0b88a Virus

W32/Checkout!91d0b88a
Risk Assessment
- Home Users: Low-Profiled
- Corporate Users: Low-Profiled
Date Discovered: 8/11/2007
Date Added: 8/11/2007
Origin: N/A
Length: 41,984 bytes
Type: Virus
SubType: Internet Worm

Virus Characteristics



This worm spreads via MSN Messenger . When installed, it sends the following message(s) to contact list recipients and send a zip file named img1756.zip (~42 KB).

* look @ my cute new puppy :-D
* look @ this picture of me, when I was a kid
* I just took this picture with my webcam, like it?
* check it, i shaved my head
* have u seen my new hair?
* what the fuck, did you see this?
* hey man, did you take this picture?

Upon execution, it creates a copy of itself into the Windows folder and also drop a zip file:

* %WINDIR%\img1756.zip (W32/Checkout zipped)
* %WINDIR%\svchost.exe (W32/Checkout)

(Where %WINDIR% is the Windows folder; e.g. C:\Windows)

It also drops a a.bat file to stop the following services. The .bat file is deleted after execution.

* Security Center
* winvnc4

Adds the following values to the registry:

* HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"Microsoft Genuine Logon" = "svchost.exe"

The worm connects to an IRC channel on {blocked}.basecase.info.


Indications of Infection

* Presence of the files/registry keys mentioned
* Unexpected network connection to the associated site(s).
* MSN contacts receiving one of the messages with zip attachment.


Method of Infection
This worm spreads by sending MSN Messenger contacts a message containing a malicious zip file (W32/Checkout) .