TrojanDropper:Win32/Rovnix.P (Microsoft), Trojan.Win32.Rovnix (Ikarus), Win32/Rovnix.Z (ESET-NOD32), Trojan.Win32.Rovnix.rg (Kaspersky)
Windows
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 may be downloaded by other malware/grayware from remote sites.
It does not have any propagation routine.
It does not have any backdoor routine.
It modifies the Internet Explorer Zone Settings.
As of this writing, the said sites are inaccessible.
It connects to certain websites to send and receive information. It takes advantage of certain vulnerabilities. However, as of this writing, the said sites are inaccessible. It gathers information and reports it to its servers.
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.
It may be downloaded by the following malware/grayware from remote sites:
Installation
This Trojan drops a copy of itself in the following folders using different file names:
(Note: %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.)
It drops the following file(s)/component(s):
(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.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It drops and executes the following files:
(Note: %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.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
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
BackUp{Volume ID} = "%Application Data%\BackUp{Volume ID}.exe"
It adds and runs the following services:
(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 registry entries to enable automatic execution of dropped component at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
RSA{Volume ID} = "%System%\rundll32.exe "%Application Data%\Microsoft\Crypto\RSA\RSA{Volume ID}.dll",DllInitialize"
Other System Modifications
This Trojan adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume ID}
LP = "%User temp%\L{Volume ID}"
HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume ID}
ID = "-- default --"
HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume ID}
SH1 = "{C&C server}"
HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume ID}
SH2 = "{C&C server}"
HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume ID}
SH3 = "{C&C server}"
HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume ID}\
PLUGIN
{CRC32 string} = "{Encrypted code of a binary file}"
Propagation
This Trojan does not have any propagation routine.
Backdoor Routine
This Trojan does not have any backdoor routine.
Process Termination
This Trojan terminates the following processes if found running in the affected system's memory:
Web Browser Home Page and Search Page Modification
This Trojan modifies the Internet Explorer Zone Settings.
Download Routine
This Trojan downloads an updated copy of itself from the following website(s):
It connects to the following URL(s) to download its component file(s):
As of this writing, the said sites are inaccessible.
Other Details
This Trojan connects to the following website to send and receive information:
It checks for the presence of the following process(es):
It does the following:
It takes advantage of the following vulnerabilities:
However, as of this writing, the said sites are inaccessible.
It terminates itself if any of the following user name(s) are found in the affected system:
It gathers the following information and reports it to its servers:
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Remove malware/grayware files that dropped/downloaded TROJ_ROVNIX.PC. (Note: Please skip this step if the threats listed below have already been removed.)
Step 4
Restart in Safe Mode
Step 5
Disable this malware service
Step 6
Delete this registry key
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 7
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 8
Search and delete these files
Step 9
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_ROVNIX.PC. 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.
Step 10
Reset Internet security settings
Step 11
Download and apply these security patches Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.
NOTES:
For Trend Micro product users, use the ATTK with ATRT to restore the modified Initial Program Loader (IPL) of an active NTFS partition.