TSPY_ZLADER.A
Win32/Injector.AVKY (Eset), Trojan.Win32.Inject (Ikarus), Trojan.Win32.Inject.hgar (Kaspersky), Trojan:Win32/Stoberox.B (Microsoft), Troj/Wonton-P (Sophos),
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: Spyware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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 executes commands from a remote malicious user, effectively compromising the affected system.
TECHNICAL DETAILS
141,312 bytes
EXE
Yes
10 Mar 2014
Connects to URLs/IPs, Collects system information
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 copies of itself into the affected system and executes them:
- {installation folder}\{random}\{random}.{random}
It adds the following processes:
- explorer.exe
It injects codes into the following process(es):
- explorer.exe
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Windows
Run = "{installation folder}\{random}\{random}.{random}"
Other System Modifications
This spyware creates the following registry entry(ies) to bypass Windows Firewall:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
{port}:TCP = "{port}:TCP:*:Enabled:Remote Assistance Remote"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
{port}:TCP = "{port}:TCP:*:Enabled:Remote Assistance Local"
Backdoor Routine
This spyware executes the following commands from a remote malicious user:
- Download other files
Information Theft
This spyware gathers the following data:
- Computer Name
- Volume Serial Number
- OS version
- IP address
Stolen Information
This spyware sends the gathered information via HTTP POST to the following URL:
- http://{BLOCKED}info.cc/common/man.php
NOTES:
The {installation folder} could be any of the following:
- %Application Data%
- %AppDataLocal%
- %User Profile%\My Documents
The created folder is the same as the filename of the dropped copy.
The extention of the dropped copy could be any of the following:
- .pif
- .com
- .exe
SOLUTION
9.700
10.660.08
12 Mar 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
Restart in Safe Mode
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 NT\CurrentVersion\Windows
- Run = "{installation folder}\{random}\{random}.{random}"
- Run = "{installation folder}\{random}\{random}.{random}"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- {port}:TCP = "{port}:TCP:*:Enabled:Remote Assistance Remote"
- {port}:TCP = "{port}:TCP:*:Enabled:Remote Assistance Remote"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- {port}:TCP = "{port}:TCP:*:Enabled:Remote Assistance Local"
- {port}:TCP = "{port}:TCP:*:Enabled:Remote Assistance Local"
Step 4
Scan your computer with your Trend Micro product to delete files detected as TSPY_ZLADER.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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