TrojanDownloader:JS/Renos

Posted: September 20, 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:	53

First Seen:	September 20, 2011
OS(es) Affected:	Windows

TrojanDownloader:JS/Renos is a JavaScript Trojan that shows tricky reports about computer system infections. TrojanDownloader:JS/Renos also downloads and installs other malware threats into the targeted PC system. TrojanDownloader:JS/Renos comes in an infected computer system when a PC user visits websites including malicious JavaScript codes. TrojanDownloader:JS/Renos hides itself as a free online scanner, which allegedly detects system infections. It is strongly recommended to uninstall TrojanDownloader:JS/Renos before it destroys your machine.

Aliases

TrojanDownloader:JS/Renos [Microsoft]HTML/FakeAlert.BHB [eTrust-Vet]Mal/FakeAvHm-A [Sophos]JS:FakeWarn-D [Avast]

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:

red.htm

File name: red.htm
Size: 1.78 KB (1784 bytes)
MD5: abca82c57b8e7f757e19e93af874af40
Detection count: 64
Mime Type: unknown/htm
Group: Malware file
Last Updated: October 4, 2011

%USERPROFILE%\Local Settings\Application Data\rdr_1278613813.exe

File name: rdr_1278613813.exe
Size: 2.73 KB (2731 bytes)
MD5: b98b504b514ced85d63aaedaae2b48cd
Detection count: 3
File type: Executable File
Mime Type: unknown/exe
Path: %USERPROFILE%\Local Settings\Application Data
Group: Malware file
Last Updated: January 11, 2012

%Temp%\[RANDOM CHARACTERS]\

File name: %Temp%\[RANDOM CHARACTERS]\
Group: Malware file

%Temp%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe

File name: %Temp%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file

More files

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\..\..{Subkeys}HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings "ProxyServer" = 'http=127.0.0.1:59274'HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings "ProxyOverride" = "HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\PhishingFilter "Enabled" = '0'HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "[RANDOM CHARACTERS].exe"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations "LowRiskFileTypes" = '.exe'HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\DownloadHKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings "ProxyEnable" = '1'