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Cryptonight trojan


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#1 mj72

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Posted 02 March 2017 - 08:28 AM

Just saying hi, hoping to resolve an issue I am having with a Cryptonight trojan

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#2 quietman7

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Posted 02 March 2017 - 03:44 PM

More information is needed. Are there any obvious file extensions appended to or with your encrypted data files (i.e. several random hexadecimal characters, words or email addresses)? If so, what is the extension and is it the same for each encrypted file or is it different?

Did you find any ransom notes and if so, what is the actual name of the note? These infections are created to alert victims that their data has been encrypted and demand a ransom payment. Check your documents folder (C:\ProgramData, C:\Documents and Settings\All Users\Application Data) for an image the malware typically uses for the background note or a randomly named .html, .txt, .png, .bmp, .url file. Most ransomware will also drop a ransom note in every directory/affected folder where data has been encrypted.

Did the cyber-criminals provide an email address to send payment to? If so, what is the email address?

The best way to identify the different ransomwares is the ransom note (including it's name), the malware file itself, any obvious extensions appended to the encrypted files, samples of the encrypted files and information related to any email addresses used by the cyber-criminals to request payment.

You can submit samples of encrypted files and ransom notes to ID Ransomware for assistance with identification and confirmation. This is a service that helps identify what ransomware may have encrypted your files and then attempts to direct you to an appropriate support topic where you can seek further assistance. Uploading both encrypted files and ransom notes together provides a more positive match and helps to avoid false detections. If ID Ransomware cannot identify the infection, you can post the case SHA1 it gives you in your next reply for Demonslay335 to manually inspect the files.

Example screenshot:
2016-07-01_0936.png

You can also submit samples of encrypted files, ransom notes, email/website address you see in the ransom demand to No More Ransom for assistance with identification and possible decrypting solutions. This is a global service backed by Kaspersky and other security partners. If you are provided any information it would be helpful to post it here for Demonslay335 to review.

Samples of any encrypted files, ransom notes or suspicious executable's (installer, malicious files, attachments) that you suspect were involved in causing the infection can be submitted here (https://www.bleepingcomputer.com/submit-malware.php?channel=168) with a link to this topic. There is a "Link to topic where this file was requested" box under the Browse... button. Doing that will be helpful with analyzing and investigating by our crypto malware experts.
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#3 mj72

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Posted 06 March 2017 - 09:31 AM

Hi thanks for your note. I am actually trying to reply to the thread here https://www.bleepingcomputer.com/forums/t/637382/infected-with-cryptonight-bitcoin-miner-trojan/page-2. This is the same situation that we are facing. Despite following the recommendations the trojan still is somehow getting installed each night at 11:00pm. 

Incidentally, this does not appear to be ransomware,, but is a bitcoin miner.


Edited by mj72, 06 March 2017 - 10:48 AM.


#4 quietman7

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Posted 06 March 2017 - 01:05 PM

Per Bleeping Computer policy, regular members cannot reply to topics posted in that forum...see A Reminder To Our Members Regarding Malware Logs.

If you need individual assistance with a malware infection, you need to follow the instructions in the Malware Removal and Log Section Preparation Guide. When you have done that, start a new topic and post your logs in the Virus, Trojan, Spyware, and Malware Removal Logs forum, NOT here, for assistance by the Malware Response Team.
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