TROJ_ZCLICK.SMA
Trojan horse Crypt3.IFJ (AVG) ,PWS:Win32/Zbot.gen!AP (Microsoft) ,a variant of Win32/Kryptik.BUVK trojan (Eset) ,Trojan.Win32.Generic!BT (Sunbelt)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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
Displays windows, Connects to URLs/IPs
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:
- %System%\{random filename 2}.exe
- %Application Data%\{random foldername}\{random filename}.exe
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It drops the following files:
- %Tasks%\Security Center Update - {number}.job
Autostart Technique
This Trojan 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\SecurityCenterServer{number}
ImagePath = "%System%\{random filename 2}.exe -service %Application Data%\{random foldername}\{random filename}.exe"
It adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{random entry} = "%Application Data%\{random folder name}\{random filename}.exe"
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{random entry} = "%Application Data%\{random folder name}\{random filename}.exe"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\ELowcQ
HKEY_LOCAL_MACHINE\SOFTWARE\{random key}
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SecurityCenterServer{number}
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\{random key}
License = "444"
Download Routine
This Trojan connects to the following URL(s) to download its configuration file:
- http://{BLOCKED}oneses.com/{uri}/{hash}
- http://{BLOCKED}d.com/{uri}/{hash}
- http://{BLOCKED}-ferr.com/{uri}/{hash}
- http://{BLOCKED}xi.com/{uri}/{hash}
Information Theft
This Trojan s configuration file contains the following information:
- Search URL (referrer url), e.g., http://{BLOCKED}nameall.com
- Update URL (new C&C), e.g., http://{BLOCKED}i.com, http://{BLOCKED}ferr.com
- Click URL (redirection url source), e.g., http://{BLOCKED}t.com/b/pkg/{random alphanumeric}
- Mutex Name
- Flash URL
NOTES:
It hooks the following APIs:
- PlaySoundA
- PlaySoundW
- WaveOutWrite
- MessageBoxA
- MessageBoxW
- MessageBoxExA
- MessageBoxExW
- MessageBoxIndirectA
- MessageBoxIndirectW
- RegCloseKey
- RegEnumKeyExA
- RegEnumKeyExW
- RegEnumValueA
- RegEnumValueW
- RegOpenKeyA
- RegOpenKeyW
- RegOpenKeyExA
- RegOpenKeyExW
- RegCreateKeyA
- RegCreateKeyW
- RegCreateKeyExA
- RegCreateKeyExW
- RegQueryInfoKeyA
- RegQueryInfoKeyW
- RegQueryValueExA
- RegQueryValueExW
- GetCursorInfo
- GetMessagePos
- GetCursorPos
- SetCursorPos
- GetMessageA
- GetMessageW
- PeekMessageA
- PeekMessageW
It displays a full screen window with loaded URLs. This windows is focus when a hooked API is used. When this windows are active, it performs various mouse movements and scrolling.
SOLUTION
9.700
10.721.00
11 Apr 2014
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
Scan your computer with your Trend Micro product and note files detected as TROJ_ZCLICK.SMA
Step 3
Restart in Safe Mode
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.
- In HKEY_LOCAL_MACHINE\SOFTWARE
- ELowcQ
- ELowcQ
- In HKEY_LOCAL_MACHINE\SOFTWARE
- {random key}
- {random key}
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
- SecurityCenterServer{number}
- SecurityCenterServer{number}
Step 5
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- {random entry} = "%Application Data%\{random folder name}\{random filename}.exe"
- {random entry} = "%Application Data%\{random folder name}\{random filename}.exe"
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- {random entry} = "%Application Data%\{random folder name}\{random filename}.exe"
- {random entry} = "%Application Data%\{random folder name}\{random filename}.exe"
Step 6
Search and delete this file
- %Tasks%\Security Center Update - {number}.job
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_ZCLICK.SMA. 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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