BigBobRoss isn't as friendly as the name implies. This ransomware uses symmetric encryption in the form of AES-128-ECB and has several file extensions when encrypting files, including .obfuscated, .cheetah, .encrypted, .encryptedALL, and .djvu. The ransomware existed throughout almost all of 2019 and asked victims to contact the ransomware operators directly to decrypt files. Luckily, a public and free decryptor is available from Avast and Emsisoft.
Ransomware - BigBobRoss
BigBobRoss
Aliases
Obfuscated
Cheetah
Decryptor Available
Yes
Description
Ransomware Type
Crypto-Ransomware
First Seen
Last Seen
Extortion Types
Direct Extortion
Mittel
Bezeichner
Email
Email
Email
Email
Email
Email
Email
Email
Email
Email
Telegram
@BigBobRoss
Telegram
@WilliGarcia
Encryption
Type
Symmetric
Files
AES-128-ECB
<file name>.obfuscated
[id=XXXXXXXX]<file name>.cheetah
[id=XXXXXXXX]<file name>.djvu
[id=XXXXXXXX]<file name>.encrypted
[id=XXXXXXXX]<file name>.encryptedALL
[id=XXXXXXXX]<file name>.obfuscated
Ransom Note Name
Encrypt Message.txt
How to recover your files.html
How to recover your files.txt
Read Me.txt
Ransom Note Image
2fec3892efa6ad300ff1d5334875d94e0470bf1b4e71449b10221f790f5f2d3
5239b2ba5e23cf5aaa05c71d6d0e59ada232f68f091bc6e31cd57cc54e27650a
615df3284db695a629aa21a8f06d4d2a00c51659ca55effe283a76e3d361698a
9abf83adb634aa4ae2acaa96ce3c636e68e946cd13d69d08975ff8c2840991ca
b9c4412242f40a182b286f57ac0ee5d4e34cf60e467966406d66e31f2ef0c388
eb00e3c45cb698e44b087fd4646da69631ae88ba670d4d1507c7232040b10138
fb5ff9634c82e92bdcd153510abd9fd0186b97d20a76c30d31ebea51c6104ef4
Decryptors
BleepingComputer Forums: BigBobRoss (.obfuscated; Read me.txt) Ransomware Support Topic
BleepingComputer Forums: new version of BigBobRoss
BleepingComputer Forums: Unknown Ransomware .CHEETAH extension
Elastio: BigBobRoss
The Crypto-Ransomware Digest: BigBobRoss, Cheetah
Twitter | X: @demonslay335 - .encryptedALL & .djvu
Twitter | X: @demonslay335 - .obfuscated