Ransomware Research
About Ryuk.Net
Ryuk.Net
Ryuk.Net was first discovered in June 2021 in enterprise cloud environments. Ryuk.Net is found in environments with a number of different names, including Chaos, etc. For a full list of all names, please see below.
| Name | Ryuk.Net |
|---|---|
| AKA |
|
| First Seen | June 2021 |
Genealogy
To better understand Ryuk.Net, we can trace it’s origins. Below is a snapshot of Ryuk.Net’s genealogy.
| Bagli |
Targeting
Behavior of Ryuk.Net
Ryuk.Net is known to target specific file types. Below are all known file types that Ryuk.Net is known to infect.
In some cases, ransomware will update the modified date, when it encrypts files. Ryuk.Net updates the last modified date of the file it targets.
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Characteristics of Ryuk.Net
Here are some of the unique characteristics that are helpful to know about Ryuk.Net.
Suffixes
Some ransomware will change or append a suffix to the end of the file after they are encrypted, including changing the extension of a file. Here are some of the possible suffixes that Ryuk.Net ransomware is known to change.
| Suffixes | .encrypted, .encrypt, .teddy, .AstraLocker, .CRYPTEDPAY, .jamesbond2021@tutanotacom_jamesbond, .deltapaymentbitcoin@gmailcom, /.[0-9a-z]{4}b/ |
|---|
Ransomware Notes
Not all ransomware leaves a note. However, some ransomware leaves the infected party instructions on what the user should do to get rid of the ransomware, or satisfy the ransom. This often involves transferring money, often bitcoin or another cryptocurrency to a designated wallet.
Below are the type(s) of notes, content, and typical locations where Elastio has found ransom notes from Ryuk.Net.
| Type | file |
|---|---|
| Location | EveryFolder |
| Type | file |
|---|---|
| File Name | olvass_el.txt |
| Location | EveryFolder |
| Type | screenshot |
|---|---|
| Location | Desktop |
Executables
These are the names of the executables that contain the undetonated ransomware payload for Ryuk.Net.
| Executables | afs.exe, aver.exe, chaos ransomware builder v3.exe, psn gift card generator.exe, rw.exe, svchost.exe, micro.exe, voucher-maiutazas.hu.pdf.exe, PSN Gift Card Generator.exe, user.exe, svchost.exe |
|---|
External Pages
Ransomware often links to external pages such as payment pages, telegram contacts, etc. Below are some of the URLs Elastio has found to be associated with Ryuk.Net.
| External Pages |
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|---|
How Elastio can help
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