Ransomware Research

About BooM


BooM was first discovered in December 2018 in enterprise cloud environments. BooM is found in environments with a number of different names, including Epsilon, Revenge, BooM NextGen, etc. For a full list of all names, please see below.

Name BooM
  • Epsilon
  • Revenge
  • BooM NextGen
First Seen December 2018


To better understand BooM, we can trace it’s origins. Below is a snapshot of BooM’s genealogy.

Xorist » BooM » EpsilonCrypt

Behavior of BooM

BooM is known to target specific file types. Below are all known file types that BooM is known to infect.

In some cases, ransomware will update the modified date, when it encrypts files. BooM resets the last modified date of the file it targets.

Learn More

Characteristics of BooM

Here are some of the unique characteristics that are helpful to know about BooM.


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 BooM ransomware is known to change.

Suffixes.Boom, .REVENGE

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 BooM.

File NameReadToRestore.txt


These are the names of the executables that contain the undetonated ransomware payload for BooM.

Executablesfile_to_save.exe, file_to_send, Boom ransomware.exe, BooM Ransomeware.exe, BooM.exe, boom.exe, Tempsvchost.exe, BooM2.exe, Ransomeware.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 BooM.

External Pages
  • mailto:neftet@tutanota.com
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