WORM_VOBFUS.JDN

Posted: May 16, 2014

Threat Metric

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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.

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% 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:	5/10
Infected PCs:	19

First Seen:	May 16, 2014
Last Seen:	March 6, 2020
OS(es) Affected:	Windows

WORM_VOBFUS.JDN is a new member of the Vobfus worm family that has acquired headline-grabbing attention with its flexible polyglot functions. Although WORM_VOBFUS.JDN uses a standard worm distribution plan that disguises its files as benign ones, WORM_VOBFUS.JDN also may rename its files in different languages, while also installing other threats, distributing itself to new PCs or giving third parties control over the infected system. The removal of WORM_VOBFUS.JDN, like any worm, always should include the use of good anti-malware solutions that are able to identify multiple copies of WORM_VOBFUS.JDN and delete them all, lest a WORM_VOBFUS.JDN worm attacks your PC from a 'backup' copy.

The Worm that Speaks in More than One Tongue

The Vobfus family is a prominent, if not necessarily unique, family of worms well-known for their exploitation of a Windows shortcut vulnerability for propagation. Variants of Vobfus, such as WORM_VOBFUS.JDN worms, are seen in new versions very regularly. Their ability to abuse polymorphism, modifying their code to avoid detection, also adds additional obstacles for anti-malware programs to overcome when identifying them. However, even for its family, malware researchers consider WORM_VOBFUS.JDN a particularly international threat, due to its built-in ability to change file names to different languages.

WORM_VOBFUS.JDN, like other Vobfus worms, distributes itself through peripheral devices by creating clones of itself under different file names. Instead of using randomized characters, WORM_VOBFUS.JDN names these after intelligible words, including erotica-suggesting ones like 'Sexy.exe,' as well as generically-applicable ones like 'Webcam.exe' or 'Password.exe.' However, unlike its earlier ancestors, WORM_VOBFUS.JDN may adjust these names to be specific to the infected machine's region. Examples of languages that WORM_VOBFUS.JDN is 'fluent' in speaking include Chinese, Vietnamese, Arabic, French, Italian, Spanish and Korean.

Keeping WORM_VOBFUS.JDN from Speaking the Words that Doom Your PC

Once one gets past its linguistic upgrade to its disguise, WORM_VOBFUS.JDN is similar to most other Vobfus worms malware researchers have encountered. Backdoor vulnerabilities, the ability to execute remote commands, Windows file-viewing modifications and functions for downloading and then launching downloaded files all are part of WORM_VOBFUS.JDN's standard arsenal. As general safety precautions after removing a WORM_VOBFUS.JDN infection, malware experts would recommend that you double-check any security-essential settings and change passwords.

Some special warnings also should be regarded whenever it comes to containing WORM_VOBFUS.JDN, and all other self-distributing PC threats. Peripheral devices with hard drives, such as USB thumb drives, are particularly common targets for worm contamination. Local networks also may be vulnerable to being compromised. Blocking these avenues of contamination will allow you to limit the damage that WORM_VOBFUS.JDN may do before you delete all copies of WORM_VOBFUS.JDN permanently. WORM_VOBFUS.JDN's use of suggestive file names also becomes another clue of the surprisingly extensive dangers that may come with launching executable files that you are not sure are safe.

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:

I love you.exe

File name: I love you.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file

Password.exe

File name: Password.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file

Naked.exe

File name: Naked.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file

Webcam.exe

File name: Webcam.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file

Sexy.exe

File name: Sexy.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file