Ransomware Research
About BigBobRoss
BigBobRoss
BigBobRoss was first discovered in January 2019 in enterprise cloud environments. BigBobRoss is found in environments with a number of different names, including Obfuscated, Cheetah, etc. For a full list of all names, please see below.
| Name | BigBobRoss |
|---|---|
| AKA |
|
| First Seen | January 2019 |
Genealogy
To better understand BigBobRoss, we can trace it’s origins. Below is a snapshot of BigBobRoss’s genealogy.
| BigBobRoss » The DMR |
Targeting
Behavior of BigBobRoss
BigBobRoss is known to target specific file types. Below are all known file types that BigBobRoss is known to infect.
In some cases, ransomware will update the modified date, when it encrypts files. BigBobRoss updates the last modified date of the file it targets.
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Characteristics of BigBobRoss
Here are some of the unique characteristics that are helpful to know about BigBobRoss.
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 BigBobRoss ransomware is known to change.
| Suffixes | .obfuscated, .encryptedALL, .djvu, .cheetah, .encrypted |
|---|
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 BigBobRoss.
| Type | file |
|---|---|
| File Name | Read Me.txt |
| Location | EveryFolder |
| Type | file |
|---|---|
| File Name | How to recover your files.txt |
| Location | EveryFolder |
| Type | file |
|---|---|
| File Name | How to recover your files.url |
| Location | EveryFolder |
| Type | file |
|---|---|
| File Name | Encrypt Message.txt |
Executables
These are the names of the executables that contain the undetonated ransomware payload for BigBobRoss.
| Executables | BigBobRoss.exe, test.exe, bedoneupx.exe, Obfuscated.exe, encrypterXD.exe, System.exe, windows64bit.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 BigBobRoss.
| External Pages |
|
|---|
Available Decryptors for BigBobRoss
Decryptors help to decrypt the infected ransomware files. Below are the known decryptors for files that have been infected by BigBobRoss.
If there are any known decryptors for this ransomware, they are linked here.
| Name | BigBobRoss decryptor |
|---|---|
| URL | https://www.emsisoft.com/en/ransomware-decryption/bigbobross |
| Name | Avast decryptor bigbobross |
|---|---|
| URL | https://files.avast.com/files/decryptor/avast_decryptor_bigbobross.exe |
How Elastio can help
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