BKDR_NEUREVT.C
Trojan:Win32/Neurevt (Microsoft), Trojan.Win32.Yakes.gqqu (Kaspersky), Win32/Injector.BNNH (ESET)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
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 executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.
It modifies the Internet Explorer Zone Settings.
TECHNICAL DETAILS
Varies
EXE
Yes
14 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 drops the following copies of itself into the affected system and executes them:
- %Program Files%\Common Files\USB Adapter Updater\{random filename}.exe
(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
It adds the following processes:
- explorer.exe
It injects itself into the following processes as part of its memory residency routine:
- explorer.exe
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
USB Adapter Updater = "%Program Files%\Common Files\USB Adapter Updater\{random filename}.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
USB Adapter Updater = "%Program Files%\Common Files\USB Adapter Updater\{random filename}.exe"
Other System Modifications
This Trojan creates the following registry entry(ies) to bypass Windows Firewall:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Windows%\explorer.exe = "%Windows%\explorer.exe:*:Enabled"
Backdoor Routine
This Trojan executes the following commands from a remote malicious user:
- Download and execute files
- Perform Slowloris flooding
- Execute shell commands
- Open a URL
- Uninstall
- Update copy of itself
It connects to the following websites to send and receive information:
- {BLOCKED}acka.com
- {BLOCKED}band.com
- {BLOCKED}obast.com
- {BLOCKED}erda.com
- {BLOCKED}utlol.com
- {BLOCKED}sonsi.com
- {BLOCKED}esa.com
- {BLOCKED}onsor.com
- {BLOCKED}ngsong.com
- {BLOCKED}stion.com
Web Browser Home Page and Search Page Modification
This Trojan modifies the Internet Explorer Zone Settings.
Information Theft
This Trojan gathers the following data:
- System information
- Installed FTP software
- Installed browsers
- Installed anti-malware products
- Other Installed software
- mIRC
- Steam
- 7-zip
- Nmap
- Hex-Rays
- Wireshark
- Skype
- VmWare
- Java version
- .NET version
- Perl
- Minecraft
- OS Version
Other Details
This Trojan does the following:
- It hooks APIs to monitors the activites of the following browsers:
- firefox.exe
- iexplore.exe
- chrome
- It hooks the following APIs:
- PR_Write
- HttpSendRequestW
- GetAddrInfoW
- It disables the following antivirus-related applications by adding the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{application}
Debugger = {random characters}.exe
where {application} are as follows:- a2guard.exe
- a2service.exe
- a2start.exe
- adaware.exe
- ALUpdate.exe
- arcaclean.exe
- avastsvc.exe
- avastui.exe
- avcenter.exe
- AVENGINE.exe
- avgcfgex.exe
- avgidsagent.exe
- avgmfapx.exe
- avgnt.exe
- avguard.exe
- avgui.exe
- avgupd.exe
- avgwdsvc.exe
- AVK.exe
- AVKTray.exe
- avshadow.exe
- BgScan.exe
- BullGuard.exe
- BullGuardBhvScanner.exe
- BullGuardScanner.exe
- BullGuardUpdate.exe
- BullGuardUpdate2.exe
- ccsvchst.exe
- ccupdate.exe
- CLPSLA.exe
- coreFrameworkHost.exe
- coreServiceShell.exe
- drstrui.exe
- egui.exe
- ekrn.exe
- epavjobs.exe
- ForceField.exe
- FProtTray.exe
- FPWin.exe
- fshoster32.exe
- GDFirewallTray.exe
- GDSC.exe
- hijackthis.exe
- housecalllauncher.exe
- K7TSUpdT.exe
- mbam.exe
- mbamgui.exe
- mcagent.exe
- McPvTray.exe
- mcshell.exe
- mcshield.exe
- McSvHost.exe
- McUICnt.exe
- mcupdate.exe
- mcupdmgr.exe
- MSASCui.exe
- MsMpEng.exe
- msseces.exe
- niu.exe
- op_mon.exe
- pctsAuxs.exe
- pctsGui.exe
- pctsSvc.exe
- PSANHost.exe
- PSUAService.exe
- PSUNMain.exe
- RavMonD.exe
- rcfp.exe
- rsmain.exe
- RsMgrSvc.exe
- RsTray.exe
- SBAMTray.exe
- sbamui.exe
- sguardxup.exe
- spybotsd.exe
- starter_avp.exe
- symerr.exe
- uiSeAgnt.exe
- uiUpdateTray.exe
- uiWatchDog.exe
- Update.exe
- update_tmp.exe
- updater.exe
- Upgrader.exe
- usrreq.exe
- uWinMgr.exe
- WRSA.exe
- zatray.exe
SOLUTION
9.700
11.212.02
14 Oct 2014
11.213.00
15 Oct 2014
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
Scan your computer with your Trend Micro product and note files detected as BKDR_NEUREVT.C
Step 3
Restart in Safe Mode
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- USB Adapter Updater = "%Program Files%\Common Files\USB Adapter Updater\{random filename}.exe"
- USB Adapter Updater = "%Program Files%\Common Files\USB Adapter Updater\{random filename}.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- USB Adapter Updater = "%Program Files%\Common Files\USB Adapter Updater\{random filename}.exe"
- USB Adapter Updater = "%Program Files%\Common Files\USB Adapter Updater\{random filename}.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- %Windows%\explorer.exe = "%Windows%\explorer.exe:*:Enabled"
- %Windows%\explorer.exe = "%Windows%\explorer.exe:*:Enabled"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{application}
- Debugger = "{random characters}.exe"
- Debugger = "{random characters}.exe"
Step 5
Reset Internet security settings
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_NEUREVT.C. 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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