TSPY_AIBATOOK.A
TrojanSpy:Win32/Aibatook.A(Microsoft), a variant of Win32/Spy.Aibatook.A trojan(Eset)
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: Yes
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.
It deletes registry entries, causing some applications and programs to not function properly.
As of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
115,200 bytes
DLL
Yes
14 Oct 2013
Connects to URLs/IPs, Downloads files, Steals information
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 and executes the following files:
- %Application Data%\{random file name}.dll - also detected as TSPY_AIBATOOK.A
(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.)
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
TcpIpCfg = "Rundll32 "%Application Data%\{random file name}.dll" MainThread"
Other System Modifications
This Trojan modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
ProxyEnable = "0"
(Note: The default value data of the said registry entry is "1".)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
ProxyOverride = "
(Note: The default value data of the said registry entry is "<-loopback>;".)
HKEY_CURRENT_CONFIG\Software\Microsoft\
windows\CurrentVersion\Internet Settings
ProxyEnable = "0"
(Note: The default value data of the said registry entry is "1".)
It deletes the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
ProxyServer = "http=127.0.0.1:8888;https=127.0.0.1:8888"
Download Routine
This Trojan accesses the following websites to download files:
- http://www.{BLOCKED}001.info/ini.txt
It saves the files it downloads using the following names:
- %Application Data%\ini.ini
(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.)
As of this writing, the said sites are inaccessible.
Information Theft
This Trojan gathers the following data:
- MAC Address
- OS Version
- Banking-related information (Card number, password, PIN, Expiration Date)
Stolen Information
This Trojan sends the gathered information via HTTP POST to the following URL:
- http://www.{BLOCKED}tj.info/mail.asp?MAC={MAC Address}&VER={OS Version} - inaccessible
- http://www.{BLOCKED}oo.com/get.asp?CardNum={Card Number}&Q1={Security Question 1}&A1={Answer to Security Question 1}&Q2={Security Question 2}&A2={Answer to Security Question 2}&LoginPass={Password}&PayPass={Password}&VER={Version}
- http://www.{BLOCKED}g.com/get.asp?CardNum={Card Number}&Q1={Security Question 1}&A1={Answer to Security Question 1}&Q2={Security Question 2}&A2={Answer to Security Question 2}&LoginPass={Password}&PayPass={Password}&VER={Version}
SOLUTION
9.300
10.346.02
17 Oct 2013
10.347.00
18 Oct 2013
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\CurrentVersion\Run
- TcpIpCfg = "Rundll32 "%Application Data%\{random file name}.dll" MainThread"
- TcpIpCfg = "Rundll32 "%Application Data%\{random file name}.dll" MainThread"
Step 4
Restore this modified 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\Internet Settings
- From: ProxyEnable = "0"
To: ProxyEnable = "1"
- From: ProxyEnable = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- From: ProxyOverride = "<local>"
To: ProxyOverride = "<-loopback>;"
- From: ProxyOverride = "<local>"
- In HKEY_CURRENT_CONFIG\Software\Microsoft\windows\CurrentVersion\Internet Settings
- From: ProxyEnable = "0"
To: ProxyEnable = "1"
- From: ProxyEnable = "0"
Step 5
Restore this deleted registry key/value from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- ProxyServer = "http=127.0.0.1:8888;https=127.0.0.1:8888;"
- ProxyServer = "http=127.0.0.1:8888;https=127.0.0.1:8888;"
Step 6
Search and delete this file
- %Application Data%\ini.ini
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_AIBATOOK.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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