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 Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local 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.. %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.. %ProgramData% is the Program Data folder, where it usually is C:\Program Files in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData in 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.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %User Profile% is a user's profile folder, where it usually is C:\Documents and Settings\{user name} on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name} 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.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It drops the following non-malicious file:
- %User Temp%\Twain002.Mtx
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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 creates the following folders:
- %User Temp%\~NwcTemp
- %User Temp%\~NwcTemp\conh09
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.)
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 user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}al.store-apps.org/d/conh09.jpg
NOTES:
The {filename} mentioned in the dropped copies may be the following:
- cisvc.exe
- clipsrv.exe
- cmstp.exe
- comrepl.exe
- csrss.exe
- dllhost.exe
- dllhst3g.exe
- esentutl.exe
- ieudinit.exe
- logman.exe
- mqtgsvc.exe
- mstinit.exe
- mstsc.exe
- rsvp.exe
- sessmgr.exe
- spoolsv.exe
- wininit.exe
- winlogon.exe
The {value} mentioned in the added registry entries may be the following:
- Cisvc
- ClipSrv
- CmSTP
- ComRepl
- DllHost3g
- DllHst
- Esent Utl
- IEudinit
- Logman
- Microsoft RSVP
- MqtgSVC
- MstInit
- Mstsc
- SessMgr
- Spool
- Spooler
- WinInit
- cisvc
- cisvc
- rsvp
- run