Ransomware Research
About Ragnarok
Ragnarok
Ragnarok was first discovered in January 2020 in enterprise cloud environments. Ragnarok is found in environments with a number of different names, including RagnarokCry, Ragnarok Doxware, etc. For a full list of all names, please see below.
| Name | Ragnarok |
|---|---|
| AKA |
|
| First Seen | January 2020 |
Genealogy
To better understand Ragnarok, we can trace it’s origins. Below is a snapshot of Ragnarok’s genealogy.
| MegaCortex » Ragnarok |
Targeting
Behavior of Ragnarok
Ragnarok is known to target specific file types. Below are all known file types that Ragnarok is known to infect.
In some cases, ransomware will update the modified date, when it encrypts files. Ragnarok updates the last modified date of the file it targets.
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Characteristics of Ragnarok
Here are some of the unique characteristics that are helpful to know about Ragnarok.
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 Ragnarok ransomware is known to change.
| Suffixes | .ragnarok, .rgnk, .thor, .hela, .ragnarok_cry, .odin |
|---|
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 Ragnarok.
| Type | file |
|---|---|
| File Name | How_To_Decrypt_My_Files.txt |
| Location | EveryFolder |
| Type | file |
|---|---|
| File Name | !!ReadMe_To_Decrypt_My_Files.txt |
| Type | file |
|---|---|
| File Name | !!Attention_How_To_Recover_My_Files.txt |
| Location | EveryFolder |
| Type | file |
|---|---|
| File Name | /^!!Read_Me.[A-F0-9]{5}.html$/ |
| Location | RootDirectory, UserFolders |
Executables
These are the names of the executables that contain the undetonated ransomware payload for Ragnarok.
| Executables | asdjasfhdlkfadfhds.exe1, patch64, rgnk3.0.exe, 730DBBFB.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 Ragnarok.
| External Pages |
|
|---|
How Elastio can help
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Elastio is a cloud-native data resilience platform on AWS, providing robust security and assuring the recoverability of critical data in cloud environments.
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