BKDR_SIMDA.SMEP1
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This backdoor 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 manually installed by a user.
TECHNICAL DETAILS
920,576 bytes
EXE
No
Connects to URLs/IPs, Downloads files, Displays ads
Arrival Details
This backdoor 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 manually installed by a user.
Download Routine
This backdoor connects to the following website(s) to download and execute a malicious file:
- http://sputnikmailru.{BLOCKED}il.ru/mailruhomesearchvbm.exe
- http://amigobin.{BLOCKED}il.ru/AmigoDistrib.exe
- http://{BLOCKED}ds.com/dstr/1006.exe
- http://{BLOCKED}ds.com/dstr/ASIns.exe
It saves the files it downloads using the following names:
- %Application Data%\Installers\mailruhomesearchvbm.exe
- %Application Data%\Installers\AmigoDistrib.exe
- %Application Data%\Installers\1006.exe
- %Application Data%\Installers\ASIns.exe
(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.)
NOTES:
Before its dowloanding routine, this backdoor performs routines similar to other SIMDA malware, checking for processes and files.
It checks if the following information are equal:
- Computer Name = Sandbox
- User name = CurrentUser
- File name = C:\file.exe
It checks for the presence of the following processes:
- Aircrack-ng Gui.exe
- apis32.exe
- CamRecorder.exe
- CamtasiaStudio.exe
- cv.exe
- DrvLoader.exe
- dumpcap.exe
- ERDNT.exe
- ERUNT.exe
- EtherD.exe
- irise.exe
- IrisSvc.exe
- observer.exe
- ollydbg.exe
- PEBrowseDbg.exe
- perl.exe
- python.exe
- Regshot.exe
- SandboxieDcomLaunch.exe
- SandboxieRpcSs.exe
- SbieCtrl.exe
- SbieSvc.exe
- Sniffer.exe
- SUPERAntiSpyware.exe
- SymRecv.exe
- Syser.exe
- tcpdump.exe
- VBoxService.exe
- VBoxTray.exe
- windbg.exe
- WinDump.exe
- wireshark.exe
- wspass.exe
- ZxSniffer.exe
It checks for the existence of the following registries:
- HKEY_CURRENT_USER\Software\CommView
- HKEY_CURRENT_USER\SYSTEM\CurrentControlSet\Services\IRIS5
- HKEY_CURRENT_USER\Software\eEye Digital Security
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Wireshark
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\wireshark.exe
- HKEY_CURRENT_USER\SOFTWARE\ZxSniffer
- HKEY_CURRENT_USER\SOFTWARE\Cygwin
- HKEY_CURRENT_USER\SOFTWARE\Cygwin
- HKEY_CURRENT_USER\SOFTWARE\B Labs\Bopup Observer
- HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Bopup Observer
- HKEY_CURRENT_USER\Software\B Labs\Bopup Observer
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Win Sniffer_is1
- HKEY_CURRENT_USER\Software\Win Sniffer
- HKEY_CURRENT_USER\SOFTWARE\Classes\PEBrowseDotNETProfiler.DotNETProfiler
- HKEY_CURRENT_USER\Software\Microsoft\tVersion\Explorer\MenuOrder\Start \Debugging Tools for Windows (x86)
- HKEY_CURRENT_USER\SYSTEM\CurrentControlSet\Services\SDbgMsg
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\der\Start Menu2\Programs\APIS32.
- HKEY_CURRENT_USER\Software\Syser Soft
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\APIS32
- HKEY_CURRENT_USER\SOFTWARE\APIS32
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Oracle VM VirtualBoxGuest Additions
- HKEY_CURRENT_USER\SYSTEM\CurrentControlSet\Services\VBoxGuest
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\tVersion\Uninstall\Sandboxie
- HKEY_CURRENT_USER\SYSTEM\CurrentControlSet\Services\SbieDrv
- HKEY_CURRENT_USER\Software\Classes\Folder\shell\sandbox
- HKEY_CURRENT_USER\Software\Classes\*\shell\sandbox
- HKEY_CURRENT_USER\SOFTWARE\SUPERAntiSpyware.com
- HKEY_CURRENT_USER\SOFTWARE\Classes\SUPERAntiSpywareContextMenuExt.SASCon.1
- HKEY_CURRENT_USER\SOFTWARE\SUPERAntiSpyware.com
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ERUNT_is1
SOLUTION
9.700
11.532.04
11 Mar 2015
11.533.00
11 Mar 2015
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
Search and delete these files
- %Application Data%\Installers\mailruhomesearchvbm.exe
- %Application Data%\Installers\AmigoDistrib.exe
- %Application Data%\Installers\1006.exe
- %Application Data%\Installers\ASIns.exe
Step 4
Scan your computer with your Trend Micro product to delete files detected as BKDR_SIMDA.SMEP1. 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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