WORM_SPYBOT.SJ


 ALIASES:

Backdoor:Win32/IRCbot.gen!Z (Microsoft); generic!bg.esb (McAfee); W32.Spybot.Worm (Symantec); HEUR:Trojan.Win32.Generic (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse BackDoor.RBot.AS (AVG)

 PLATFORM:

Windows

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

946,176 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

06 Dec 2014

Arrival Details

This worm 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:

  • %System%\svdhost.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It creates the following folders:

  • %User Profile%\Application Data\TEMP

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

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
Windows Sound = "svdhost.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunServices
Windows Sound = "svdhost.exe"

Other System Modifications

This worm adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Licenses

HKEY_CLASSES_ROOT\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\AuxUserType

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\AuxUserType\
2

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats\
DefaultSet

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats\
GetSet

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats\
GetSet\0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats\
GetSet\1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats\
GetSet\2

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DefaultIcon

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\Implemented Categories

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\Implemented Categories\
{7DD95801-9882-11CF-9FA9-00AA006C42C4}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\Implemented Categories\
{7DD95802-9882-11CF-9FA9-00AA006C42C4}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\InprocHandler32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\Insertable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\LocalServer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\LocalServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\MiscStatus

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\PersistentHandler

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\verb

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\verb\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\verb\
1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\verb\
2

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\zboyfhOoAHs

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\zptotxwOw

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\mCkwx

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\lwxbAbhuoa

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\kNcnnjb

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DbdxwX

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices

HKEY_CURRENT_USER\Software\Microsoft\
OLE

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{R7C0DB872A3F777C0} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{K7C0DB872A3F777C0} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
AppID = "{00022601-0000-0000-C000-000000000046}"

HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{IDEE9E09D11E5850E} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{0DEE9E09D11E5850E} = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
OLE
Windows Sound = "svdhost.exe"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent\CurrentVersion\Parameters
TrapPollTimeMilliSecs = "3a98"

(Note: The default value data of the said registry entry is 3a98.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Ole
EnableDCOM = "N"

(Note: The default value data of the said registry entry is Y.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Lsa
restrictanonymous = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Lsa
restrictanonymoussam = "1"

(Note: The default value data of the said registry entry is 1.)

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\Version

Dropping Routine

This worm drops the following files:

  • %System%\wpcap.dll
  • %System%\packet.dll
  • %System%\Drivers\npf.sys
  • %User Profile%\Application Data\TEMP:466F9D5D

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Other Details

This worm connects to the following possibly malicious URL:

  • {BLOCKED}5.{BLOCKED}5

It deletes itself after execution.

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.700

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

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\Software
    • Licenses
  • In HKEY_CLASSES_ROOT\CLSID
    • {CD363BEC-7150-B887-530D-5F3E2E0424EA}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • AuxUserType
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\AuxUserType
    • 2
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • DataFormats
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats
    • DefaultSet
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats
    • GetSet
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats\GetSet
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats\GetSet
    • 1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\DataFormats\GetSet
    • 2
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • DefaultIcon
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • Implemented Categories
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\Implemented Categories
    • {7DD95801-9882-11CF-9FA9-00AA006C42C4}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\Implemented Categories
    • {7DD95802-9882-11CF-9FA9-00AA006C42C4}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • InprocHandler32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • Insertable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • LocalServer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • LocalServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • MiscStatus
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • PersistentHandler
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • verb
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\verb
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\verb
    • 1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}\verb
    • 2
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • zboyfhOoAHs
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • zptotxwOw
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • mCkwx
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • lwxbAbhuoa
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • kNcnnjb
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • DbdxwX
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion
    • RunServices
  • In HKEY_CURRENT_USER\Software\Microsoft
    • OLE

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\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Windows Sound = "svdhost.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
    • Windows Sound = "svdhost.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
    • {R7C0DB872A3F777C0} = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
    • {K7C0DB872A3F777C0} = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • AppID = "{00022601-0000-0000-C000-000000000046}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
    • {IDEE9E09D11E5850E} = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
    • {0DEE9E09D11E5850E} = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\OLE
    • Windows Sound = "svdhost.exe"

Step 5

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RFC1156Agent\CurrentVersion\Parameters
    • From: TrapPollTimeMilliSecs = "3a98"
      To: TrapPollTimeMilliSecs = ""3a98""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole
    • From: EnableDCOM = "N"
      To: EnableDCOM = ""Y""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Lsa
    • restrictanonymous = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Lsa
    • From: restrictanonymoussam = "1"
      To: restrictanonymoussam = ""1""

Step 6

Search and delete these components

[ Learn More ]
There may be some components that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %System%\wpcap.dll
  • %System%\packet.dll
  • %System%\Drivers\npf.sys
  • %User Profile%\Application Data\TEMP:466F9D5D

Step 7

Search and delete this folder

[ 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.
  • %User Profile%\Application Data\TEMP

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_SPYBOT.SJ. 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 9

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CD363BEC-7150-B887-530D-5F3E2E0424EA}
    • Version


Did this description help? Tell us how we did.