TROJ_MUTOPY
Rodecap
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
Mutopy (also known as Rodecap) is a malware family of Trojans used to download other malware. It also randomizes the way it drops its copies so that anti-malware products will have difficulty in cleaning the affected system.
TECHNICAL DETAILS
Installation
This Trojan drops the following copies of itself into the affected system:
- %AppDataLocal%\{filename}
- %Application Data%\{filename}
- %Application Data%\Microsoft\{filename}
- %ProgramData%\{filename}
- %System Root%\Users\All Users\{filename}
- %System Root%\Users\All Users\Microsoft\{filename}
- %System%\drivers\{filename}
- %User Profile%\AppData\Local\Microsoft\{filename}
- %User Profile%\Local Settings\Application Data\{filename}
- %User Profile%\Local Settings\Application Data\Microsoft\{filename}
- %User Temp%\{filename}
- %Windows%\{filename}
- %Windows%\System\{filename}
(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local on Windows Vista and 7.. %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.. %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This is usually C:\ProgramData in Windows Vista and 7, or C:\Program Files on Windows 2000, XP (32-bit), and Server 2003, or C:\Program Files (x86) on Windows XP (64-bit).. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %System% is the Windows system folder, which is usually C:\Windows\System32.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Windows% is the Windows folder, which is usually C:\Windows.)
It drops the following non-malicious file:
- %User Temp%\Twain002.Mtx
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
It creates the following folders:
- %User Temp%\~NwcTemp
- %User Temp%\~NwcTemp\conh09
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
{value} = "{dropped copy}"
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
{value} = "{dropped copy}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
{value} = "{dropped copy}"
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
{value} = "{dropped copy}"
HKEY_CURRENT_USER\.DEFAULT\Software\
Microsoft\Windows\CurrentVersion\
Policies\Explorer\Run
{value} = "{dropped copy}"
HKEY_CURRENT_USER\.DEFAULT\Software\
Microsoft\Windows\CurrentVersion\
Policies\Explorer\Run
{value} = "{dropped copy}"
It modifies the following registry entries to ensure it automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Windows
{value} = "{dropped copy}"
(Note: The default value data of the said registry entry is {blank}.)
Download Routine
This Trojan saves the files it downloads using the following names:
- %User Temp%\~NwcTemp\conh09\conhost.exe
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}al.store-apps.org/d/conh09.jpg