JAVA_ARCAL.A
Exploit:Java/CVE-2012-0507 (Microsoft)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This Trojan may be hosted on a website and run when a user accesses the said website.
It does not have any propagation routine.
It does not have any backdoor routine.
It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
It does not have any information-stealing capability.
TECHNICAL DETAILS
Arrival Details
This Trojan may be hosted on a website and run when a user accesses the said website.
Propagation
This Trojan does not have any propagation routine.
Backdoor Routine
This Trojan does not have any backdoor routine.
Download Routine
This Trojan takes advantage of the following software vulnerabilities to download possibly malicious files:
It saves the files it downloads using the following names:
- %User Profile%\awt43abr.exe
- %User Profile%\berstrestvers.exe
- %User Profile%\bawt34tv.exe
- %User Profile%\tab4vrtve.exe
- %User Profile%\wgsdgsdgdsgsd.exe
- %User Profile%\ab43yctewatv.exe
- %User Profile%\a43vtzgbdgv.exe
- %User Profile%\atv4tvq34.exe
- %User Profile%\bg34dfbewgba4.exe
- %User Profile%\av4a43by4ayb.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 then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
It downloads a possibly malicious file from a certain URL. The URL where this malware downloads the said file depends on the following parameter(s) passed on to it by its components:
- val
- prime
Information Theft
This Trojan does not have any information-stealing capability.
Other Details
This Trojan executes the downloaded file using the following commands:
- regsvr32 -s %User Profile%\{file name}.exe
- %User Profile%\{file name}.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.)
NOTES:
The downloaded file is detected as TSPY_FAREIT.MEX
This may be hosted on the following sites:
- http://{BLOCKED}removalonly.org/closest/{random value}.php
- http://{BLOCKED}owinggopayment.net/closest/{random value}.php
- http://{BLOCKED}selse.org/closest/{random value}.php
It does not have rootkit capabilities.
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 3
Close all opened browser windows
Step 4
Search and delete these components
- %User Profile%\awt43abr.exe
- %User Profile%\berstrestvers.exe
- %User Profile%\bawt34tv.exe
- %User Profile%\tab4vrtve.exe
- %User Profile%\wgsdgsdgdsgsd.exe
- %User Profile%\ab43yctewatv.exe
- %User Profile%\a43vtzgbdgv.exe
- %User Profile%\atv4tvq34.exe
- %User Profile%\bg34dfbewgba4.exe
- %User Profile%\av4a43by4ayb.exe
Step 5
Scan your computer with your Trend Micro product to delete files detected as JAVA_ARCAL.A. 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 6
Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.
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