Mal/ExpJS-AA

Posted: February 22, 2012

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.

Ranking:	7,161
Threat Level:	2/10
Infected PCs:	8,872

First Seen:	February 22, 2012
Last Seen:	October 7, 2023
OS(es) Affected:	Windows

Mal/ExpJS-AA is a malicious file that's crafted explicitly to take advantage of JavaScript exploits while Mal/ExpJS-AA attacks your PC. Although Mal/ExpJS-AA can be installed from most sources that distribute PC threats, SpywareRemove.com malware researchers note that Mal/ExpJS-AA's most visible attacks have involved spam e-mail links. These links use redirect-based exploits to force you to download other PC threats, such as Mal/ExpJS-AA, which can create serious security vulnerabilities for your computer. Being careful around unusual file attachments or links from strange e-mail messages should be your first defense against Mal/ExpJS-AA, although your second defense should always be readiness to remove Mal/ExpJS-AA with a qualified brand of anti-malware scanner.

Denying a Mal/ExpJS-AA E-mail the Opportunity to Harm Your PC

Recent Mal/ExpJS-AA attacks can be identified as fake e-mail messages that pose as changelog updates (a record of changes made to a project over one or multiple updates; for example, patch notes for software). Mal/ExpJS-AA spam is, so far, limited to brief and unconvincing messages such as the example below, although other variants may also be used in the future:

Subject: Re: Your Changelog

Message body:
Good day,
as promised chnglog attached (Open with Internet Explorer)

Even though Mal/ExpJS-AA was first identified by many PC security companies in 2011, these attacks have been reported in 2012. SpywareRemove.com malware experts advise you to delete any e-mail that resembles the above example, since Mal/ExpJS-AA and other PC threats that are included in the same delivery method will be unable to infect your PC as long as you don't interact with the included file attachment. Standard precautions against JavaScript exploits, such as keeping JavaScript up-to-date, disabling it selectively or even keeping JavaScript uninstalled may also help to protect your computer from Mal/ExpJS-AA.

Threats to Watch for in a Redirect That Lands You in a Mal/ExpJS-AA Trap

If you do make the miscalculation of trusting the above e-mail message's attachment (which may be detected by the name Mal/Iframe-W, your browser will be redirected to a malicious site along with the following message:

You are redirecting
Loading... Wait please...

Mal/ExpJS-AA and a second PC threat, the Trojan Troj/PDFEx-ET, will proceed to attack your PC and should be removed with suitable anti-malware programs. Afterwards, they may install other malicious software, steal personal information or attack your computer’s security features. Symptoms of these PC threats, including Mal/ExpJS-AA, are not considered to be very visible, and SpywareRemove.com malware experts caution that warnings from appropriate anti-malware products may be your only clue to the presence of Mal/ExpJS-AA or its Trojan companion.

In addition to its dependency on the prerequisite JavaScript package to exploit, Mal/ExpJS-AA is also noted as a Windows-specific PC threat, along with Troj/PDFEx-ET. Non-Windows operating systems such as Mac and Linux should be considered safe from any Mal/ExpJS-AA attacks.

Technical Details

Additional Information

The following URL's were detected:

bismuni.com