WORM_SDBOT.SPB
Trojan:Win32/Qhost.gen!D (Microsoft), W32.IRCBot.Gen (Symantec), Generic QHosts.a.gen (McAfee), Mal/NafBot-A (Sophos), Trojan.Win32.Ircbot!cobra (Sunbelt), W32/Antavmu.FC!tr (Fortinet); W32/Bloop.A.gen!Eldorado (Fprot), Worm.Win32.Pushbot (Ikarus), Win32/Boberog.BG worm (Nod32), Trojan W32/Rbot.BOA (Norman),
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This worm arrives by connecting affected removable drives to a system. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
It modifies the affected system's HOSTS files. This prevents users from accessing certain websites.
TECHNICAL DETAILS
81,920 bytes
EXE
Yes
24 Jan 2012
Arrival Details
This worm arrives by connecting affected removable drives to a system.
It may arrive via network shares.
It 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 worm drops the following copies of itself into the affected system:
- %Windows%\test.exe
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
It terminates the execution of the copy it initially executed and executes the copy it drops instead.
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
test = "test.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Terminal Server\
Install\Software\Microsoft\
Windows\CurrentVersion\Run
test = "test.exe"
Other System Modifications
This worm creates the following registry entry(ies) to bypass Windows Firewall:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{malware path}\{malware name}.exe = "{malware path}\{malware name}.exe:*:Enabled:1"
Propagation
This worm creates the following folders in all removable drives:
- driver
- driver\usb
It drops the following copy(ies) of itself in all removable drives:
- driver\usb\{random characters}
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
The said .INF file contains the following strings:
[autorun]
open=driver\usb\{random characters}
action=Open
shell\open=Open
shell\open\command=driver\usb\{random characters}
Usb_Driver installed
Backdoor Routine
This worm connects to any of the following IRC server(s):
- irc.{BLOCKED}ini.net
HOSTS File Modification
This worm modifies the affected system's HOSTS files to prevent a user from accessing the following websites:
- www.symantec.com
- securityresponse.symantec.com
- symantec.com
- www.sophos.com
- sophos.com
- www.mcafee.com
- mcafee.com
- liveupdate.symantecliveupdate.com
- www.viruslist.com
- viruslist.com
- viruslist.com
- f-secure.com
- www.f-secure.com
- kaspersky.com
- kaspersky-labs.com
- www.avp.com
- www.kaspersky.com
- avp.com
- www.networkassociates.com
- networkassociates.com
- www.ca.com
- ca.com
- mast.mcafee.com
- my-etrust.com
- www.my-etrust.com
- download.mcafee.com
- dispatch.mcafee.com
- secure.nai.com
- nai.com
- www.nai.com
- update.symantec.com
- updates.symantec.com
- us.mcafee.com
- liveupdate.symantec.com
- customer.symantec.com
- rads.mcafee.com
- trendmicro.com
- www.trendmicro.com
- www.grisoft.com
- www.grisoft.com
- virustotal.com
- www.virustotal.com
- virscan.org
- www.virscan.org
- scanner.novirusthanks.org
- www.scanner.novirusthanks.org
- virusscan.jotti.org
- www.virusscan.jotti.org
- threatexpert.com
NOTES:
This worm drops copies of itself in the following folders used in peer-to-peer networks:
- %Program Files%\kazaa\my shared folder\
- %Program Files%\kazaa lite\my shared folder\
- %Program Files%\kazaa lite k++\my shared folder\
- %Program Files%\icq\shared folder\
- %Program Files%\grokster\my grokster\
- %Program Files%\bearshare\shared\
- %Program Files%\edonkey2000\incoming\
- %Program Files%\emule\incoming\
- %Program Files%\morpheus\my shared folder\
- %Program Files%\limewire\shared\
- %Program Files%\tesla\files\
- %Program Files%\winmx\shared\
It uses the following file names for the copies it drops in the folders mentioned above:
- Autoloader.exe
- DDOSPING.exe
- Ebooks.exe
- FREEPORN.exe
- fuckshitcunt.scr
- headjobs.scr
- HotmailHacker.exe
- How-to-make-money.exe
- ilovetofuck.scr
- image.scr
- LimeWireCrack.exe
- MSNHacks.exe
- paris-hilton.scr
- Porno.MPEG.exe
- porno.scr
- RapidsharePREMIUM.exe
- ScreenMelter.exe
- VistaUltimate-Crack.exe
- WildHorneyTeens.scr
- Wireshark.exe
- YahooCracker.exe
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Terminate a malware/grayware process
*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.
- test.exe
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\Windows\CurrentVersion\Run
- test = "test.exe"
- test = "test.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\Install\Software\Microsoft\Windows\CurrentVersion\Run
- test = "test.exe"
- test = "test.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- {malware path}\{malware name}.exe = "{malware path}\{malware name}.exe:*:Enabled:1"
- {malware path}\{malware name}.exe = "{malware path}\{malware name}.exe:*:Enabled:1"
Step 4
Search and delete these folders
Step 5
Remove these strings added by the malware/grayware/spyware in the HOSTS file
Step 6
Search and delete AUTORUN.INF files created by WORM_SDBOT.SPB that contain these strings
Step 7
Scan your computer with your Trend Micro product to delete files detected as WORM_SDBOT.SPB. 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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