Monthly Threat Report: November 2014

The Top Ten Threats

1. HTML/Refresh
Previous Ranking: 1
Percentage Detected: 3.13%

HTML/Refresh is a Trojan that redirects the browser to a specific URL location with malicious software. The program code of the malware is usually embedded in HTML pages.

2. Win32/Bundpil
Previous Ranking: 2
Percentage Detected: 2.33%

Win32/Bundpil.A is a worm that spreads via removable media. The worm contains an URL address from which it tries to download several files. The files are then executed and HTTP protocol is used for comunication with the C&C to receive new commands. The worm may delete the following folders:

3. Win32/Adware.MultiPlug
Previous Ranking: 5
Percentage Detected: 1.93%

Win32/Adware.Multiplug is a Possible Unwanted Application that once it’s present into the users system might cause applications to displays advertising popup windows during internet browsing.

4. Win32/TrojanDownloader.Wauchos
Previous Ranking: N/A
Percentage Detected: 1.48%

It is a trojan which tries to download other malware from the Internet. It collects information about the operating system, settings and the computer IP address. Then, attempts to send gathered information to a remote machine. It can download files from a remote computer and/or the Internet, run executable files, create Registry entries and remove itself from the infected computer.

5. Win32/Sality
Previous Ranking: 8
Percentage Detected: 1.41%

Sality is a polymorphic file infector. When executed it starts a service and created/deleted registry keys related to security applications activite in the system and to ensure that the malicious process restarts at each reboot of operating system.
It modifies EXE and SCR files and disables services and processes implemented by and associated with security solutions.

More information relating to a specific signature:

6. LNK/Agent.AK
Previous Ranking: 7
Percentage Detected: 1.35%

LNK/Agent.AK is a link that concatenates commands to execute legitimate code while running the threat code in the background. It is similar in its effect to the older autorun.inf type of threat. This vulnerability became known at the time of discovery of Stuxnet, as it was one of four vulnerabilities that were executed by Stuxnet variants.

7. JS/Kryptik.I
Previous Ranking: 3
Percentage Detected: 1.29%

JS/Kryptik is a generic detection of malicious obfuscated JavaScript code embedded in HTML pages; it usually redirects the browser to a malicious URL or implements a specific exploit.

8. INF/Autorun
Previous Ranking: 10
Percentage Detected: 1.22%

INF/Autorun is a generic detection of versions of the autorun.inf configuration file created by malware. The malicious AUTORUN.INF file contains the path to the malware executable. This file is usually dropped into the root folder of all the available drives in an attempt to autorun a malware executable when the infected drive is mounted. The AUTORUN.INF file(s) may have the System (S) and Hidden (H) attributes present in an attempt to hide the file from Windows Explorer.

9. Win32/Ramnit
Previous Ranking: N/A
Percentage Detected: 1.17%

This is a file infector that executes every time the system starts. It infects .dll (direct link library) and .exe executable files and also searches htm and html files so as to insert malicious instructions into them. It exploits a vulnerability found on the system (CVE-2010-2568) that allows it to execute arbitrary code. It can be controlled remoteley to capture screenshots, send information it has gathered, download files from a remote computer and/or the Internet, and run executable files or shut down/restart the computer.

10. HTML/ScrInject
Previous Ranking: 6
Percentage Detected: 1.08%

Generic detection of HTML web pages containing script obfuscated or iframe tags that that automatically redirect to the malware download.

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