WORM_SPYBOT.BET

October 17, 2012
 Modified by: Mark Joseph Manahan
 ALIASES:

Worm:Win32/Neeris.gen!C (Microsoft); W32/Autorun.worm.c (McAfee); Backdoor.Sdbot (Symantec); PAK:PESpin, Worm.Win32.AutoRun.wcy (Kaspersky); Trojan.Win32.Packer.PESpinv1.32 (ep) (Sunbelt)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Via software vulnerabilities, Dropped by other malware, Downloaded from the Internet

This worm arrives via removable drives. 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 exploits software vulnerabilities to propagate to other computers across a network.

It executes commands from a remote malicious user, effectively compromising the affected system.

  TECHNICAL DETAILS

File Size:

52,736 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

29 Nov 2011

Payload:

Compromises system security

Arrival Details

This worm arrives via removable drives.

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

This malware arrives via the following means:

  • MS08-067 (Remote Code Execution)

Installation

This worm drops the following copies of itself into the affected system:

  • %System%\VMwareService.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Autostart Technique

This worm registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\VMwareService
ImagePath = "%System%\VMwareService.exe"

It registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\VMwareService

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Enum\Root\LEGACY_VMWARESERVICE

Other System Modifications

This worm adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{malware path and file name} = "{malware path and file name}:*:enabled:microsoft enabled"

Propagation

This worm creates the following folders in all removable drives:

  • {drive letter}:\RECYCLER
  • {drive letter}:\RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213

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

  • {drive letter}:\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

It exploits the following software vulnerabilities to propagate to other computers across a network:

  • MS08-67 (Vulnerability in Server Service Could Allow Remote Code Execution)

Backdoor Routine

This worm executes the following commands from a remote malicious user:

  • Get System Information
  • Download and execute arbitrary files.
  • Manage Files and Processes
  • Steal stored passwords
  • Shutdown machine
  • Update Itself

It connects to the following URL(s) to send and receive commands from a remote malicious user:

  • 1.{BLOCKED}f.in

NOTES:

It attempts to open computers in the network with running SQL Servers by using the following usernames and password combinations:

  • 12345
  • 123456
  • 1234567
  • 12345678
  • 123456789
  • 1234567890
  • access
  • accounting
  • accounts
  • admin
  • administrador
  • administrat
  • administrateur
  • administrator
  • admins
  • backup
  • bitch
  • blank
  • brian
  • changeme
  • chris
  • cisco
  • compaq
  • control
  • database
  • databasepass
  • databasepassword
  • db1234
  • dbpass
  • dbpassword
  • default
  • domain
  • domainpass
  • domainpassword
  • exchange
  • george
  • guest
  • hello
  • homeuser
  • internet
  • intranet
  • katie
  • linux
  • login
  • loginpass
  • nokia
  • oeminstall
  • oemuser
  • office
  • oracle
  • orainstall
  • outlook
  • pass1234
  • passwd
  • password
  • password1
  • peter
  • qwerty
  • server
  • siemens
  • sqlpassoainstall
  • staff
  • student
  • susan
  • system
  • teacher
  • technical
  • win2000
  • win2k
  • win98
  • windows
  • winnt
  • winpass
  • winxp

  SOLUTION

Minimum Scan Engine:

9.200

VSAPI OPR PATTERN File:

8.613.00

VSAPI OPR PATTERN Date:

29 Nov 2011

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

Restart in Safe Mode

[ Learn More ]

Step 3

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\SYSTEM\CurrentControlSet\Services
    • VMwareService
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root
    • LEGACY_VMWARESERVICE

Step 4

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\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
    • {malware path and file name} = "{malware path and file name}:*:enabled:microsoft enabled"

Step 5

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 6

Search and delete AUTORUN.INF files created by WORM_SPYBOT.BET that contain these strings

[ Learn More ]

[autorun]
open=RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exe
icon=ϿstemRootϿystem32\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 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_SPYBOT.BET. 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 8

Download and apply these security patches Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.  Microsoft Security Bulletin MS08-067


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