SecneurX Threat Analysis
what is Niwm Ransomware ?
Niwm is ransomware that belongs to the Djvu/Stop Ransomware family. Analysts at SecneurX observed that among the prominent ransomware families in 2023, Djvu/Stop was one of the most used by the attackers. As per the research data, Djvu/Stop was mainly used in citizen-centric attacks but they can be used to target organizations as well.
Niwm ransomware encrypts files and appends its extension (".niwm") to filenames. Also, it drops the "_readme.txt" file that contains a ransom note. After executing the Niwm ransomware all files and folders got encrypted and appended their filenames with a ".niwm" extension. For Example, a file titled "Sep2019.docx" appeared as "Sep2019.docx.niwm", "Jan2020.docx" as "Jan2020.docx.niwm", and so on. Screenshot of files encrypted by Niwmransomware
Ransomware Note (“_readme.txt”) in Text
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https[:]//we[.]tl/t-fkW8qLaCVQ Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: email@example.com
Reserve e-mail address to contact us: firstname.lastname@example.org
IOC DETAILS DOMAINS zexeq[.]com uaery[.]top
URLS hxxp[:]//zexeq[.]com/raud/get[.]php?pid=***&first=*** hxxp[:]//uaery[.]top/dl/build2[.]exe hxxp[:]//91[.]107[.]229[.]205/stat[.]zip