Virus Profile: Generic Exploit!pw3

Threat Search
Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 6/17/2012
Date Added: 6/18/2012
Origin: Unknown
Length: Varies
Type: Trojan
Subtype: Exploit
DAT Required: 6745
Removal Instructions


  An initial threat vector may be hosted on a website in the form of an Applet. The Applet would contain code to exploit CVE-2012-0507.The intent of the exploit is to surreptitiously download and execute additional malware on the infected system. An indication of this may be the presence unusual traffic to unknown domains.

Unspecified vulnerability in the Java Runtime Environment component in Oracle Java SE JDK and JRE 5(update 33),6(Update 30) and 7(update 2) and earlier updates allows remote untrusted Java Web Start applications and untrusted Java applets to affect confidentiality, integrity, and availability via unknown vectors related to Scripting.

The vulnerability is in the implementation of the AtomicReferenceArray class that allows type safety checks to be circumvented to bypass the Java sandbox will permit Java to download and execute malware. The Applet typically contains code that consumes a URL Name (also a part of the Applet) which hosts the malware.


Microsoft - Exploit:Java/CVE-2012-0507.CT
Drweb  - Exploit.CVE2012-0507.9
Kaspersky -
Symantec - Trojan.Maljava

Indication of Infection

The exploit may download arbitrary files.
This exploit attempts to download and execute additional malware to the infected system.

Methods of Infection

 This threat exploits an unpatched vulnerability in Sun Microsystems Java.
 This Trojan can be installed while browsing compromised websites.

Virus Characteristics

Generic Exploit!pw3  is a detection which is used by attacker to bypass the Java sandbox restriction and execute arbitrary code.

The class file exploits the vulnerability present in the AtomicReference Array to bypass the java sandbox mechanism. The attacker crafts the class file with the serialized object data where it will trigger the vulnerability by deserializing the object array. The Vulnerability triggering class file is called by another class file which acts as a loader. Once it is exploited the loader class file will call another class file which will download the payload and execute it.

Upon successful exploitation tries to connect the below URL through remote port 53 and listen to a Random port



All Users:
Use current engine and DAT files for detection and removal.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).


PC Infected? Get Expert Help

Virus Removal Service

Connect to one of our Security Experts by phone. Have your PC fixed remotely - while you watch!