Worm:AutoIt/Ippedo.A (Microsoft), Trojan.Win32.AutoIt.cfo (Kaspersky), Win32/Autoit.JW worm, Win32/Autoit.JW worm (ESET), Trj/Autoit.gen (Panda)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
This worm 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.
Arrival Details
This worm 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 worm drops the following copies of itself into the affected system:
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It creates the following folders:
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It terminates itself if it finds the following processes in the affected system's memory:
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
Windows Update = "%System Root%\Google\Windowsupdate.lnk"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Windows Update = "%System Root%\Google\Windowsupdate.lnk"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
AdopeUpdate = "%System Root%\Google\GoogleUpdate.lnk"
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
JavaUpdate = "%System Root%\Google\GoogleUpdate.lnk"
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
NewJavaInstall = "%System Root%\Google\AutoIt3.exe /AutoIt3ExecuteScript %System Root%\Google\googleupdate.a3x"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
AdopeFlash = "%System Root%\Google\AutoIt3.exe /AutoIt3ExecuteScript %System Root%\Google\googleupdate.a3x"
It drops the following file(s) in the Windows Common Startup folder to enable its automatic execution at every system startup:
Other System Modifications
This worm deletes the following files:
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = "0"
(Note: The default value data of the said registry entry is {user-defined}.)
Propagation
This worm drops the following copy of itself in all physical and removable drives:
Backdoor Routine
This worm executes the following commands from a remote malicious user:
It connects to the following URL(s) to send and receive commands from a remote malicious user:
Information Theft
This worm gathers the following data:
Other Details
This worm accesses the following URL(s) to get the affected system's location:
NOTES:
If the OS version is Windows7 or Windows XP, it will retrieve system information using the following command:
It terminates itself if system information contains the following strings:
It will terminate itself if malware file name meets the following conditions:
It will terminate itself if the following folders are present:
It will enumerate process modules. It terminates itself if the following files are found:
It creates the following shortcut (.LNK) files in removable drives that points to its copy:
It also creates shortcut (.LNK) files using folder names as filenames in folders in all drives.
The dropped shorcut files are detected as LNK_IPPEDO.B.
It copies all files found in the current malware path to the created Skypee folder.
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
Remove the malware/grayware file dropped/downloaded by WORM_IPPEDO.B. (Note: Please skip this step if the threat(s) listed below have already been removed.)
Step 3
Restart in Safe Mode
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.
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.
Step 6
Search and delete these folders
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_IPPEDO.B. 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.