Trojan.Maljava

Posted: November 23, 2011

Threat Metric

The Threat Meter is a malware assessment that SpywareRemove.com's research team is able to give every identifiable malware threat. Our Threat Meter includes several criteria based off of specific malware threats to value their severity, reach and volume. The Threat Meter is able to give you a numerical breakdown of each threat's initial Threat Level, Detection Count, Volume Count, Trend Path and Percentage Impact. The overall ranking of each threat in the Threat Meter is a basic breakdown of how all threats are ranked within our own extensive malware database. The scoring for each specific malware threat can be easily compared to other emerging threats to draw a contrast in its particular severity. The Threat Meter is a useful tool in the endeavor of seeking a solution to remove a threat or pursue additional analytical research for all types of computer users.

The following fields listed on the Threat Meter containing a specific value, are explained in detail below:

Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.

Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.

Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.

Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.

% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.

Threat Level:	9/10
Infected PCs:	99

First Seen:	November 23, 2011
OS(es) Affected:	Windows

Trojan.Maljava is a general label that's used for malicious JavaScript files that use Java-based vulnerabilities to attack your PC through your web browser. Although Trojan.Maljava can be spread in quite a few different ways, SpywareRemove.com malware analysts have linked recent Trojan.Maljava attacks to fake e-mail ticket confirmation messages that have been sent to random e-mail addresses. Due to this surge in Trojan.Maljava proliferation by e-mail, it's recommended that you take particular care to avoid clicking on suspicious e-mail site links. Keeping Java up-to-date to eliminate recently-discovered vulnerabilities and using competent anti-malware programs can also help to prevent Trojan.Maljava infection. If worse comes to worst, remove Trojan.Maljava from your PC when it's required. Because Trojan.Maljava is a generalized detection name, symptoms of Trojan.Maljava infection may vary, and you should use suitable anti-malware programs to detect and delete Trojan.Maljava.

Don't Be Too Quick to Accept Trojan.Maljava's Fake Tick

As a general JavaScript-based attack, Trojan.Maljava can be distributed in the same ways that JavaScript itself can be distributed – typically via malicious websites or advertisements. Using an operating system that doesn't support JavaScript or using security settings that can prevent JavaScript from automatically running can help to protect your PC from Trojan.Maljava attacks. In most cases, Trojan.Maljava attacks will not have visible signs of their activities, and you may not be able to detect Trojan.Maljava at all without alerts from appropriate anti-malware software.

As of late November 2011, SpywareRemove.com malware research team has found that many Trojan.Maljava attacks have been especially-linked to spam e-mail links that are disguised as airline ticket confirmations. Although a spam message that propagates Trojan.Maljava may look like a realistic ticket confirmation, you should be able to notice that the link redirects you to an unusual website. A simple way to thwart this attack is to avoid clicking on e-mail links – instead, navigate to any given website by directly-typing the web address into your navigation bar to confirm or debunk the legitimacy of the e-mail message.

When Your Defenses Against JavaScript Abuses Falter

If you visit a site that hosts Trojan.Maljava, your browser may be attacked by default, regardless of any other actions that you take (or don't take) on the guilty site. These attacks can be used to install other forms of malicious software, ravage your computer's security settings, block access to anti-malware software, hijack your web browser or steal private information. If you suspect that your browser has come into contact with a suspicious site, you should assume that your PC may be infected and scan your entire system with a trustworthy type of anti-malware program.

Updating JavaScript to its latest release can help to reduce if not totally eliminate these Java-based vulnerabilities that are exploited by Trojan.Maljava. In most cases, actually deleting Trojan.Maljava shouldn't be done manually, since most Trojans will attempt to alter basic Windows files and hide themselves to resist removal. Improper deletion of Trojan.Maljava may cause serious damage to Windows although effective removal with a dedicated anti-malware application should leave no traces of Trojan.Maljava's former presence on your PC.

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:

Quarantaene.zip

File name: Quarantaene.zip
Size: 2.42 MB (2428815 bytes)
MD5: 08dabc7f83bbf1657bc285a610e61698
Detection count: 33
Mime Type: unknown/zip
Group: Malware file
Last Updated: November 29, 2011

ntshrui.dll

File name: ntshrui.dll
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file

/Users/<username>/update.py

File name: /Users/<username>/update.py
Mime Type: unknown/py
Group: Malware file

/Users/<username>/update.sh

File name: /Users/<username>/update.sh
Mime Type: unknown/sh
Group: Malware file

Temp~2.exe

File name: Temp~2.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file

Temp~2.py

File name: Temp~2.py
Mime Type: unknown/py
Group: Malware file

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\..\..{Subkeys}HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall\Trojan.MaljavaHKEY_CURRENT_USER\Software\Trojan.Maljava