Type
File Name
Location
JSWorm was first discovered in April 2019 in enterprise cloud environments. JSWorm is found in environments with a number of different names, including JSWorm, JSWorm 2.0, JSWorm 3.0-3.1, JSWorm 4.0.2-4.0.3, etc. For a full list of all names, please see below.
Name
JSWorm
First Seen
April 2019
JSWorm is known to target specific file types. Below are all known file types that JSWorm is known to infect.
In some cases, ransomware will update the modified date, when it encrypts files. JSWorm updates the last modified date of the file it targets.
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 JSWorm ransomware is known to change.
Suffixes
.JSWORM, .JURASIK, .JSWRM, .UNNAMED
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 JSWorm.
Type File Name Location file JSWORM-DECRYPT.html EveryFolder file UNNAMED-DECRYPT.txt EveryFolder file JSWORM-DECRYPT.txt EveryFolder file JSWRM-DECRYPT.hta EveryFolder file JBUIIGF-DECRYPT.hta
These are the names of the executables that contain the undetonated ransomware payload for JSWorm.
Executables
JSWorm.exe, build.exe, MANWARD6, MANWARD6.exe, 5527.exe, jsworm.exe, svchost.exe
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 JSWorm.
External Pages
