Troj/ExpJS-IV
Posted: May 8, 2013
Threat Metric
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: | 80 |
| First Seen: | May 8, 2013 |
|---|---|
| Last Seen: | November 25, 2020 |
| OS(es) Affected: | Windows |
Troj/ExpJS-IV is a Trojan that circulates via a compromised website of US Department of Labor. A subdomain of the main website of the Department, running off a separate server, what's known colloquially as a microsite, was changed to incorporate a malware infection, particularly Troj/ExpJS-IV. Troj/ExpJS-IV uses a malicious Java script file that involves what are known as anti-anti-virus techniques. This means that the attacker actively strives to avoid detection by interfering with the operation of one or more of the anti-virus software the computer user may be running. The malicious Java script, detected as as Troj/ExpJS-IV, even attempts to connect to the local web console to reconfigure the product on the PC user's behalf.
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