TROJ_ZBOT.APQ
PWS:Win32/Zbot.gen!Y (Microsoft); Trojan.Zbot (Symantec); PWS-Spyeye.e (McAfee); Trojan-Spy.Win32.Zbot.azdd (Kaspersky); W32/Zbot.AZDD!tr (Fortinet); TR/Spy.ZBot.azdd (AntiVir); Trojan.Spy.Zbot-132 (ClamAV); Trojan-Spy.Win32.SpyEyes (Ikarus); TrojanSpy.Zbot.azdd (Vba32)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
Arrival Details
This Trojan 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 Trojan drops the following copies of itself into the affected system:
- %User Profile%\Application Data\{random folder name 1}\{random file name 1}.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
It drops the following files:
- %User Profile%\Application Data\{random folder name 2}\{random file name 2}
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
It creates the following folders:
- %User Profile%\Application Data\{random folder name 1}
- %User Profile%\Application Data\{random folder name 2}
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random CLSID} = "%User Profile%\Application Data\{random folder name 1}\{random file name 1}.exe"
Other System Modifications
This Trojan adds the following registry keys as part of its installation routine:
HKEY_CURRENT_USER\Software\Microsoft
{random key} =
Information Theft
This Trojan accesses the following site to download its configuration file:
- http://www.{BLOCKED}usa.ru/sonshine.bin
SOLUTION
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
Identify and delete files detected as TROJ_ZBOT.APQ using either the Startup Disk or Recovery Console
Step 3
Delete this registry value
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\Windows\CurrentVersion\Run
- {random CLSID}=%User Profile%\Application Data\{random folder name 1}\{random file name 1}.exe
- {random CLSID}=%User Profile%\Application Data\{random folder name 1}\{random file name 1}.exe
Step 4
Delete this registry key
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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.
- In HKEY_CURRENT_USER\Software\Microsoft
- {random key}
- {random key}
Step 5
Search and delete this folder
- %User Profile%\Application Data\{random folder name 1}
- %User Profile%\Application Data\{random folder name 2}
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_ZBOT.APQ. 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.
Did this description help? Tell us how we did.