TROJ_ROVNIX.AEN
PWS:Win32/Zbot (Microsoft); RDN/Generic PWS.y!bbf (McAfee); Trojan.FakeAV (Symantec); Trojan-PSW.Win32.Tepfer.umqx (Kaspersky); Troj/Agent-AJEP (Sophos); Trojan horse Inject2.AXZQ (AVG)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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 itself after execution.
TECHNICAL DETAILS
103,424 bytes
EXE
Yes
09 Oct 2014
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 creates the following folders:
- %User Profile%\Application Data\Opeflo
(Note: %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.)
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\Run
Qeoxahona = "%User Profile%\Opeflo\zyibikq.exe "
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Qeoxahona = "%User Profile%\Opeflo\zyibikq.exe "
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Chcvifhsno
HKEY_CURRENT_USER\SOFTWARE\Chcvifhsno
HKEY_CURRENT_USER\SOFTWARE\AVygrA
HKEY_LOCAL_MACHINE\SOFTWARE\AVygrA
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Chcvifhsno
License = "3b7"
HKEY_CURRENT_USER\Software\Chcvifhsno
License = "3b7"
HKEY_CURRENT_USER\Software\AVygrA
dynamicdata = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\AVygrA
dynamicdata = "{random values}"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Session Manager\SubSystems
Windows = "{random characters}"
(Note: The default value data of the said registry entry is {random values}.)
Dropping Routine
This Trojan drops the following files:
- %User Temp%\UpdateFlashPlayer_5e5cd232.exe
- %User Temp%\UpdateFlashPlayer_e887e855.exe
- %User Profile%\Opeflo\zyibikq.exe
- %Windows%\Tasks\Security Center Update - 1429042151.job
- %System%\noowraazti.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.. %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.. %Windows% is the Windows folder, where it usually is C:\Windows 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.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}ay.su/b/shoe/951
- http://{BLOCKED}ay.su/mod_articles-auth-23.89/jquery
- http://{BLOCKED}ay.su/mod_articles-auth-23.89/ajax
- http://{BLOCKED}ay.su/b/letr/A7F765DBB39C81AC3D5D0EB1
- http://{BLOCKED}ay.su/b/letr/5863740BB091CBDB3E5044C6
- {BLOCKED}6.224.175
- {BLOCKED}1.155.44
- {BLOCKED}.112.170
- {BLOCKED}.218.116
- {BLOCKED}0.138.71
- {BLOCKED}.49.116
It deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
9.700
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 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.
- In HKEY_LOCAL_MACHINE\SOFTWARE
- Chcvifhsno
- In HKEY_CURRENT_USER\SOFTWARE
- Chcvifhsno
- In HKEY_CURRENT_USER\SOFTWARE
- AVygrA
- In HKEY_LOCAL_MACHINE\SOFTWARE
- AVygrA
Step 4
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- Qeoxahona = "%User Profile%\Opeflo\zyibikq.exe "
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- Qeoxahona = "%User Profile%\Opeflo\zyibikq.exe "
- In HKEY_LOCAL_MACHINE\SOFTWARE\Chcvifhsno
- License = "3b7"
- In HKEY_CURRENT_USER\Software\Chcvifhsno
- License = "3b7"
- In HKEY_CURRENT_USER\Software\AVygrA
- dynamicdata = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\AVygrA
- dynamicdata = "{random values}"
Step 5
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager\SubSystems
- From: Windows = "{random characters}"
To: Windows = ""{random values}""
- From: Windows = "{random characters}"
Step 6
Search and delete these components
- %User Temp%\UpdateFlashPlayer_5e5cd232.exe
- %User Temp%\UpdateFlashPlayer_e887e855.exe
- %User Profile%\Opeflo\zyibikq.exe
- %Windows%\Tasks\Security Center Update - 1429042151.job
- %System%\noowraazti.exe
Step 7
Search and delete this folder
- %User Profile%\Application Data\Opeflo
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_ROVNIX.AEN. 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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