Crypt38 Ransomware
Posted: June 20, 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: | 10/10 |
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Infected PCs: | 11 |
First Seen: | June 20, 2016 |
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OS(es) Affected: | Windows |
The Crypt38 Ransomware is a file encryption Trojan that prevents you from accessing data on your PC until you pay a fee. However, some flaws in the Crypt38 Ransomware's encryption methodology have led to the rapid development of a decryptor, helping victims achieve full data recovery without paying a third-party for the privilege. Removing the Crypt38 Ransomware with the usual anti-malware utilities and then receiving assistance from the appropriate PC security resources should expedite a full recovery from its attacks.
The Importance of Programming Security Even for Trojans
The Crypt38 Ransomware is another file-encrypting campaign associating itself with Russian victims, and, like most of its kind, it uses an AES algorithm to scramble the internal data of a target's work content or entertainment media. Examples of files under fire by the Crypt38 Ransomware include the ever-common JPG and TXT, as well as more esoteric choices like CDW (a 3D modeling format) and even torrents. Malware researchers did verify the use of a new extension that flags all content that the Crypt38 Ransomware encrypts, the '.the Crypt38' extension, which can make identifying encrypted data a straightforward process.
The vast majority of encryption-specialized Trojans, even ones designed from threat construction kits rented out by third parties, use asymmetric encryption techniques that distinguish the encryption key from the decryption key (the process of reversing the effects of the data rearranging algorithm). The Crypt38 Ransomware is part of a bold minority for using symmetric encryption, which lets victims 'reverse engineer' the attack effectively, as long as they know their ID number.
The Crypt38 Ransomware generates this number independently for each installation of the threat, meaning that the same ID will not help multiple victims seeking to recover their information. However, it also displays the number automatically within its ransom payment pop-up. As a result, even the Crypt38 Ransomware's oddly low extortion demands of a thousand rubles are completely unneeded for recovering from an infection.
Prying at All the Possibilities in Poorly-Coded Trojans
The Crypt38 Ransomware includes more than its fair share of amateur mistakes in how it implements its payload, but still can be potentially functional at blockading your locally-saved content. Since the Crypt38 Ransomware enumerates an extensive range of drives individually during its encryption process, its attack may take a significant amount of time to complete, which gives you more leeway to identify the threat's presence. However, non-local backups still are the single best method for keeping the Crypt38 Ransomware's attacks from harming your files.
Two separate methods exist for decrypting the Crypt38 Ransomware's encrypted content for free. The first involves using the ID number and a third party key generator, with the Crypt38 Ransomware handling the actual decryption routine. However, malware experts have noted some issues with the Crypt38 Ransomware's decryption that could cause irrevocable data corruption, which is why they encourage using a complete, third-party decryptor. Removing the Crypt38 Ransomware with your anti-malware tools of choice does not invalidate either method of data recovery, although you may wish to reserve samples beforehand for one or more PC security companies.
Poor coding is most often a case in point of how bad software practices can lead to security problems, but sometimes, it also causes problems for the threat black market. If nothing else, a victim of a the Crypt38 Ransomware can be thankful of its evidence that Trojan creators are just as fallible as everyone else.
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