WORM_SDBOT.JSB

 Analysis by: Sabrina Lei Sioting

 ALIASES:

Backdoor:Win32/IRCbot.FY (Microsoft), Net-Worm.Win32.Mytob.ger (Kaspersky), W32.IRCBot.Gen (Symantec), Generic.Sdbot.FB98E302 (Bitdefender), W32/Kolabc.GVC!worm (Fortinet); W32/Bloop.A.gen!Eldorado (Fprot), Virus.Win32.IRCBot.BSX (Ikarus), Win32/AutoRun.IRCBot.FC (Nod32), Worm W32/Ircbot.AITJ (Norman), W32/Gaobot.OXI.worm (Panda),

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • 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 via peer-to-peer (P2P) 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.

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

File Size:

89,088 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

24 Jan 2012

Arrival Details

This worm arrives by connecting affected removable drives to a system.

It arrives via peer-to-peer (P2P) 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%\wintask.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.

Propagation

This worm creates the following folders in all removable drives:

  • RECYCLER
  • RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213

It drops the following copy(ies) of itself in all removable drives:

  • RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exe

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=RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exe
icon=%SystemRoot%\system32\SHELL32.dll,4
action=Open folder to view files
shell\open=Open
shell\open\command=RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exe
shell\open\default=1

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
  • bottalk.us
  • 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
  • pandasoftware.com
  • www.pandasoftware.com
  • www.trendmicro.com
  • www.grisoft.com
  • www.microsoft.com
  • microsoft.com
  • www.virustotal.com
  • virustotal.com
  • threatexpert.com
  • novirusthanks.org
  • scanner.novirusthanks.org

NOTES:

This worm drops copies of itself in the following folders used in peer-to-peer networks:

  • %Program File%\\bearshare\shared\
  • %Program File%\\edonkey2000\incoming\
  • %Program File%\\emule\incoming\
  • %Program File%\\grokster\my grokster\
  • %Program File%\\icq\shared folder\
  • %Program File%\\kazaa lite k++\my shared folder\
  • %Program File%\\kazaa lite\my shared folder\
  • %Program File%\\kazaa\my shared folder\
  • %Program File%\\limewire\shared\
  • %Program File%\\morpheus\my shared folder\
  • %Program File%\\tesla\files\
  • %Program File%\\winmx\shared\

It uses the following file names for the copies it drops in the folders mentioned above:

  • Bebo/Myspace/Facebook Password Stealer.exe
  • Counter Strike Source Crack.exe
  • Dark DDoS Tool.exe
  • DCOM Exploit.exe
  • DivX Pro + KeyGen.exe
  • Hotmail Cracker.exe
  • Hotmail Hacker.exe
  • Kaspersky Crack.exe
  • Keylogger.exe
  • L0pht 4.0 Windows Password Cracker.exe
  • Limewire PRO Final Edition.exe
  • Microsoft Visual Basic KeyGen.exe
  • Microsoft Visual C++ KeyGen.exe
  • Microsoft Visual Studio KeyGen.exe
  • MSN Keylogger.exe
  • MSN Password Cracker.exe
  • MSN Password Stealer.exe
  • MSN Spammer/Nudger.exe
  • NetBIOS Cracker.exe
  • NetBIOS Hacker.exe
  • Norton AntiVirus ALL VERSIONS Crack.exe
  • older man and young boy.scr
  • SAMP GTA MultiPlayer.exe
  • screensaver.scr
  • sdbot with NetBIOS Spread.exe
  • Spore Crack.exe
  • Spore Full Patcher.exe
  • Steam Crack.exe
  • Steam KeyGen.exe
  • Sub7 2.3 Private.exe
  • Windows Password Cracker.exe
  • Windows XP Validator Crack.exe
  • Young boy nude.scr
  • Young girl and boy sex.scr
  • young girl first time.scr
  • Young girl nude.scr teen sex.scr
  • Youtube Account Cracker.exe

  SOLUTION

Minimum Scan Engine:

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

[ Learn More ]

*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.

     wintask.exe

Step 3

Search and delete these folders

[ 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.
  • {drive letter}\RECYCLER

Step 4

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

[ Learn More ]
    127.0.0.1 www.symantec.com
    127.0.0.1 securityresponse.symantec.com
    127.0.0.1 bottalk.us
    127.0.0.1 symantec.com
    127.0.0.1 www.sophos.com
    127.0.0.1 sophos.com
    127.0.0.1 www.mcafee.com
    127.0.0.1 mcafee.com
    127.0.0.1 liveupdate.symantecliveupdate.com
    127.0.0.1 www.viruslist.com
    127.0.0.1 viruslist.com
    127.0.0.1 viruslist.com
    127.0.0.1 f-secure.com
    127.0.0.1 www.f-secure.com
    127.0.0.1 kaspersky.com
    127.0.0.1 kaspersky-labs.com
    127.0.0.1 www.avp.com
    127.0.0.1 www.kaspersky.com
    127.0.0.1 avp.com
    127.0.0.1 www.networkassociates.com
    127.0.0.1 networkassociates.com
    127.0.0.1 www.ca.com
    127.0.0.1 ca.com
    127.0.0.1 mast.mcafee.com
    127.0.0.1 my-etrust.com
    127.0.0.1 www.my-etrust.com
    127.0.0.1 download.mcafee.com
    127.0.0.1 dispatch.mcafee.com
    127.0.0.1 secure.nai.com
    127.0.0.1 nai.com
    127.0.0.1 www.nai.com
    127.0.0.1 update.symantec.com
    127.0.0.1 updates.symantec.com
    127.0.0.1 us.mcafee.com
    127.0.0.1 liveupdate.symantec.com
    127.0.0.1 customer.symantec.com
    127.0.0.1 rads.mcafee.com
    127.0.0.1 trendmicro.com
    127.0.0.1 pandasoftware.com
    127.0.0.1 www.pandasoftware.com
    127.0.0.1 www.trendmicro.com
    127.0.0.1 www.grisoft.com
    127.0.0.1 www.microsoft.com
    127.0.0.1 microsoft.com
    127.0.0.1 www.virustotal.com
    127.0.0.1 virustotal.com
    127.0.0.1 threatexpert.com
    127.0.0.1 novirusthanks.org
    127.0.0.1 scanner.novirusthanks.org
"

Step 5

Search and delete AUTORUN.INF files created by WORM_SDBOT.JSB that contain these strings

[ Learn More ]
[autorun]
open=RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exe
icon=%SystemRoot%\system32\SHELL32.dll,4
action=Open folder to view files
shell\open=Open
shell\open\command=RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exe
shell\open\default=1

Step 6

Scan your computer with your Trend Micro product to delete files detected as WORM_SDBOT.JSB. 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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