Ransomware Research

About Atchbo


Atchbo was first discovered in October 2017 in enterprise cloud environments.

Name Atchbo
First Seen October 2017


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

ExoLock » Atchbo

Behavior of Atchbo

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

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

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Characteristics of Atchbo

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


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 Atchbo ransomware is known to change.


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 Atchbo.

File Name/^UnlockYourFiles[0-9]{2}.txt$/
LocationUserFolders, RootDirectory


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

ExecutablesAtchbo Ransomware2.0v.exe, Atchbo ExE Binder.exe
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