‘.trun File Extension’ Ransomware
Posted: February 8, 2016
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: | 8/10 |
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Infected PCs: | 9 |
First Seen: | February 8, 2016 |
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Last Seen: | January 5, 2023 |
OS(es) Affected: | Windows |
The '.trun File Extension' Ransomware is a file encrypting Trojan that blocks your ability to access files and encourages paying ransoms for their recovery. Such attacks are noticeable from changed file extensions and names, which provide visual identifiers of the encrypted files. Instead of paying a con artist to restore your data, malware experts stress the usefulness of free backups for accomplishing the same goal at no charge, as well as using anti-malware products for uninstalling the '.trun File Extension' Ransomware.
The E-Mail that Runs Away with Your Files
The '.trun File Extension' Ransomware is part of a threat campaign that has been active since early February, at a minimum, with recent samples of this threat including features for evading anti-malware analysis. Malware researchers found evidence of the '.trun File Extension' Ransomware's distribution model using e-mails, with the crafted messages disguising their attached payloads as being non-threatening documents. It currently is unknown whether these messages are targeting specific entities or random (or previously phished) addresses.
The '.trun File Extension' Ransomware includes an auto-launching routine that lets it start automatically, and, after launching, scan your files for particular types that it can encrypt. Unlike most file encryptors that use wide ranges of file formats for victimization, the '.trun File Extension' Ransomware only has been confirmed of attacking document and spreadsheet formats, such as Excel's XLS, Word's DOC and Adobe's PDF. The '.trun File Extension' Ransomware inserts the additional suffix '.trun' to each file, but, most importantly, encrypts these file, making them unreadable.
Once it's finished, the '.trun File Extension' Ransomware also places a text file on your hard drive. This message emphasizes the strength of the encryption method used and recommends e-mailing an 'expert' for assistance with a decryption solution, but doesn't mention the ransom fee, presumably to lure more victims into making contact.
Being an Expert on Beating File Encryptors
The '.trun File Extension' Ransomware may be less obvious than some Trojans in how it demands payment, but is no less benevolent than all other file-encrypting threats. As with most file encryptors, the '.trun File Extension' Ransomware attacks local data but has no impact on remote backups. Backup files stored on removable devices (that are unassociated with your PC at the time of infection) and cloud-based backups can restore your data without requiring any payment to an illicit entity. Local backups run the risk of being deleted by the '.trun File Extension' Ransomware or an associated threat.
PC users without experience in the anti-malware industry always should use their automated security software for removing the '.trun File Extension' Ransomware. Since file name changes provided by the '.trun File Extension' Ransomware are superficial, and have no impact on the encryption attacks, whether you choose to rename your files or not is up to you. On prevention strategies, reputable anti-malware tools also should be capable of identifying Trojan droppers and other threat installers distributing themselves through e-mail attachments heuristically. As usual, the installation of the '.trun File Extension' Ransomware, ultimately, can be laid at the victim's feet.
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