BKDR_PUSHDO.VJ
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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 downloaded from remote sites by other malware.
It does not have any propagation routine.
It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.
TECHNICAL DETAILS
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 downloaded from remote site(s) by the following malware:
- variants of TSPY_BEBLOH
Installation
This backdoor drops the following copies of itself into the affected system:
- %User Profile%\femjannacafe.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- femjannacafe
Autostart Technique
This backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
femjannacafe = "%User Profile%\femjannacafe.exe"
Other System Modifications
This backdoor adds the following registry keys:
HKEY_CURRENT_USER\Software\Symnesaeeocak
It adds the following registry entries as part of its installation routine:
HKEY_CURRENT_USER\Software\Symnesaeeocak
Qowegejuqko = “{Hex values}”
HKEY_CURRENT_USER\Software\Symnesaeeocak
femjannacafe{random} = “{Hex Values}”
Propagation
This backdoor does not have any propagation routine.
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- Download and execute arbitrary files
- Retrieve Spam Configuration/Content
- Get OS Version
- Get System Information
- Get Network Information
It connects to the following websites to send and receive information:
- http://www.{{BLOCKED}s.com
Other Details
This backdoor does the following:
- It performs random POST Request connection to the following URLs to mask network traffic and hide the C&C communication.
- kernsafe.com
- ottospm.com
- ex-olive.com
- jroy.net
- iamdirt.com
- stnic.co.uk
- depalo.com
- sclover3.com
- x0c.com
- netcr.com
- dgmna.com
- mobilnic.net
- pwd.org
- cel-cpa.com
- dayvo.com
- medisa.info
- koz1.net
- vexcom.com
- yoruksut.com
- spanesi.com
- jenco.co.uk
- speelhal.net
- valselit.com
- t-tre.com
- transsib.com
- cokocoko.com
- otena.com
- owsports.ca
- yocinc.org
- tvtools.fi
- snugpak.com
- ora.ecnet.jp
- nelipak.nl
- h-f.net
- baijaku.com
- wkhk.net
- pb-games.com
- nunomira.com
- edimart.hu
- fcwcvt.org
- c9dd.com
- 2print.com
- wifi4all.nl
- elpro.si
- gpthink.com
- stajum.com
- valdal.com
- naoi-a.com
- pcgrate.com
- tc17.com
- crcsi.org
- maktraxx.com
- yumgiskor.kz
- olras.com
- myropcb.com
- waldi.pl
- abart.pl
- ftchat.com
- pohlfood.com
- ka-mo-me.com
- 11tochi.net
- rs-ag.com
- item-pr.com
- jacomfg.com
- medius.si
- photo4b.com
- findbc.com
- fnw.us
- abdg.com
- railbook.net
- reglera.com
- udesign.biz
- domon.com
- alteor.cl
- pupi.cz
- usadig.com
- sjbs.org
- petsfan.com
- fnsds.org
- quadlock.com
- jchysk.com
- fink.com
- {BLOCKED}du.com
- vazir.se
- synetik.net
- hummer.hu
- credo.edu.pl
- aevga.com
- pdqhomes.com
- wnsavoy.com
- ora-ito.com
- evcpa.com
- pr-park.com
- fe-bauer.de
- holleman.us
- xaicom.es
- nqks.com
- mqs.com.br
- lrsuk.com
- Perform spam-bot routine based from SPAM configuration received from C&C communication
- create svchost.exe process
- inject code and configuration to created svchost.exe
SOLUTION
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
Restart in Safe Mode
Step 4
Remove the malware/grayware file that dropped/downloaded BKDR_PUSHDO.VJ. (Note: Please skip this step if the threat(s) listed below have already been removed.)
-
variants of TSPY_BEBLOH
Step 5
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_CURRENT_USER\Software
- Symnesaeeocak
- Symnesaeeocak
Step 6
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
- femjannacafe = "%User Profile%\femjannacafe.exe"
- femjannacafe = "%User Profile%\femjannacafe.exe"
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_PUSHDO.VJ. 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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