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BKDR_BIZOME.A

October 08, 2012
 Analysis by: Kathleen Notario
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW


This backdoor may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

  TECHNICAL DETAILS

File Size:

318,464 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

28 Sep 2010

Payload:

Compromises system security

Arrival Details

This backdoor may be dropped by other malware.

It may be unknowingly downloaded by a user while visiting malicious websites.

Autostart Technique

This backdoor 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\IPZ
ImagePath = "{malware path and filename}" --service

Other System Modifications

This backdoor adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{malware path and filename} = {malware path and filename}:*:Enabled:ipz

Backdoor Routine

This backdoor opens the following port(s) where it listens for remote commands:

  • 310

Dropping Routine

This backdoor drops the following files:

  • %Current%\\ipz-db.bin
  • %Current%\log.xt

Other Details

Based on analysis of the codes, it has the following capabilities:

  • It displays the following:
  • It may be executed using command-line and may have the following parameters: /i - install itself as service /s - start service /r - remove service /l - log activities of the malware
  • It performs ICMP requests that floods a target system by continuously sending PING requests to a series of IP addresses using port 4899.

It displays the following images:

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.496.09

VSAPI PATTERN Date:

28 Sep 2010

VSAPI PATTERN Date:

9/28/2010 12:00:00 AM

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

Scan your computer with your Trend Micro product and note files detected as BKDR_BIZOME.A

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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
    • IPZ

Step 5

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\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
    • {malware path and filename}={malware path and filename}:*:Enabled:ipz

Step 6

Search and delete this file

[ Learn More ]
There may be some component files 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.
%Current%\ipz-db.bin
%Current%\log.xt

Step 7

Scan your computer with your Trend Micro product to delete files detected as BKDR_BIZOME.A. 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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