TSPY_ZBOT.SMD1

 Modified by: Adrianne Chester Camat

 ALIASES:

PWS:Win32/Zbot.gen!AM (Microsoft)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

This spyware 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:

312,832 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

10 Apr 2013

Arrival Details

This spyware 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 spyware drops the following non-malicious files:

  • %Application Data%\Microsoft\Address Book\{Username}.wab

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

It creates the following folders:

  • %Application Data%\{random characters}

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

It injects threads into the following normal process(es):

    Autostart Technique

    This spyware adds the following registry entries to enable its automatic execution at every system startup:

    HKEY_CURRENT_USER\Software\Microsoft\
    Windows\CurrentVersion\Run
    {random GUID} = %Application Data%\{random characters}\{random characters}.exe"

    Other System Modifications

    This spyware adds the following registry keys:

    HKEY_CURRENT_USER\Software\Microsoft\
    {random characters}

    It adds the following registry entries:

    HKEY_CURRENT_USER\Software\Microsoft\
    Internet Account Manager
    Server ID = "4"

    HKEY_CURRENT_USER\Software\Microsoft\
    WAB\WAB4
    FirstRun = "1"

    HKEY_CURRENT_USER\Software\Microsoft\
    WAB\WAB4
    OlkContactRefresh = "0"

    HKEY_CURRENT_USER\Software\Microsoft\
    WAB\WAB4
    OlkFolderRefresh = "0"

    HKEY_CURRENT_USER\Software\Microsoft\
    {random characters}
    "{random values}" = "{random values}"

    HKEY_CURRENT_USER\Software\Microsoft\
    {random characters}
    "{random values}" = "{random values}"

    HKEY_CURRENT_USER\Software\Microsoft\
    {random characters}
    "{random values}" = "{random values}"

    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
    Services\SharedAccess\Parameters\
    FirewallPolicy\StandardProfile
    DisableNotifications = "1"

    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
    Services\SharedAccess\Parameters\
    FirewallPolicy\StandardProfile\GloballyOpenPorts\
    List
    24022:UDP = "24022:UDP:*:Enabled:UDP 24022"

    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
    Services\SharedAccess\Parameters\
    FirewallPolicy\StandardProfile
    DisableNotifications = "0"

    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
    Services\SharedAccess\Parameters\
    FirewallPolicy\StandardProfile\GloballyOpenPorts\
    List
    18598:TCP = "18598:TCP:*:Enabled:TCP 18598"

    HKEY_CURRENT_USER\Software\Microsoft\
    {random characters}
    "{random values" = "{random values}"

    HKEY_CURRENT_USER\Software\Microsoft\
    {random characters}
    "{random values}" = "{random values}"

    HKEY_CURRENT_USER\Software\Microsoft\
    {random characters}
    "{random values}" = "{random values}"

    HKEY_CURRENT_USER\Software\Microsoft\
    {random characters}
    "{random values}" = "{random values}"

    HKEY_CURRENT_USER\Software\Microsoft\
    {random characters}
    "{random values}" = "{random values}"

    HKEY_CURRENT_USER\Software\Microsoft\
    {random characters}
    "{random values}" = "{random values}"

    It modifies the following registry entries:

    HKEY_CURRENT_USER\Identities
    Last Username = "Main Identity"

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

    HKEY_CURRENT_USER\Identities
    Last User ID = "{random GUID}"

    (Note: The default value data of the said registry entry is {C0FE0177-5693-4537-9331-A7402AD82D40}.)

    HKEY_CURRENT_USER\Identities
    Identity Login = "9853"

    (Note: The default value data of the said registry entry is 98053.)

    HKEY_CURRENT_USER\Identities
    Identity Ordinal = "2"

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

    Dropping Routine

    This spyware drops the following files:

    • %Application Data%\{Random characters}
    • %Application Data%\{Random characters}\akik.exe
    • %Application Data%\{Random characters}.eds

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

    Other Details

    This spyware deletes itself after execution.

    NOTES:
    It monitors browser activities and gathers information if it contains the following strings:

    • bancline
    • fidelity
    • micrsolv
    • tellerplus
    It tries to connect to the following IP Addresses through random ports:
    • {BLOCKED}.98.41
    • {BLOCKED}.177.93
    • {BLOCKED}.177.58
    • {BLOCKED}.60.70
    • {BLOCKED}.76.99
    • {BLOCKED}.73.176
    • {BLOCKED}.94.108
    • {BLOCKED}.205.87
    • {BLOCKED}.94.194

      SOLUTION

    Minimum Scan Engine:

    9.300

    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_CURRENT_USER\Software\Microsoft
      • {Random Characters}

    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.



    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    {Random GUID} = "%Application Data%\{Random Characters}\{Random Characters}.exe"
    HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager
    Server ID = "4"
    HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
    FirstRun = "1"
    HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
    OlkContactRefresh = "0"
    HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
    OlkFolderRefresh = "0"
    HKEY_CURRENT_USER\Software\Microsoft\{random characters}
    {random values} = "{random values}"
    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
    DisableNotifications = "1"
    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
    24022:UDP = "24022:UDP:*:Enabled:UDP 24022"
    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
    DisableNotifications = "0"
    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
    18598:TCP = "18598:TCP:*:Enabled:TCP 18598"

    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_CURRENT_USER\Identities
      • From: Last Username = "Main Identity"
        To: Last Username = ""Main Identity""
    • In HKEY_CURRENT_USER\Identities
      • From: Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"
        To: Last User ID = ""{C0FE0177-5693-4537-9331-A7402AD82D40}""
    • In HKEY_CURRENT_USER\Identities
      • From: Identity Login = "9853"
        To: Identity Login = ""98053""
    • In HKEY_CURRENT_USER\Identities
      • From: Identity Ordinal = "2"
        To: Identity Ordinal = ""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.
    • %Application Data%\{random characters}
    • %User Profile%\{random characters}\{random characters}.exe
    • %Application Data%\{random characters}.eds

    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.
    • %Application Data%\{random characters}

    Step 8

    Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_ZBOT.SMD1. 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

    Scan your computer with your Trend Micro product to delete files detected as TSPY_ZBOT.SMD1. 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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