blackcat

General

Target

blackcat.exe
Size

2.6MB
Sample

230925-qh75aafa7s
MD5

bb266486ee8ac70c0687989e02cefa14
SHA1

11203786b17bb3873d46acae32a898c8dac09850
SHA256

0c6f444c6940a3688ffc6f8b9d5774c032e3551ebbccb64e4280ae7fc1fac479
SHA512

a167779fc95a5cf0a3eff86211e9e08c282470e050b17ae62c7499a82ea59b3447446eafea9d7b5c5ba833b7a2d060f76530b00509dd5ff7904a0735d83e14c4
SSDEEP

49152:rEqvaaAjc2hdKjb8WXqE1PiEbE/TKMt3/RgaJ2wW4PRT8O1:rbyaALKjwWXV1P9oVvwwW4JT8

Score

10^/10

Malware Config

Extracted

Family

blackcat

Credentials

Username:
KELLERSUPPLY\Administrator
Password:
d@gw00d

Username:
KELLERSUPPLY\AdminRecovery
Password:
K3ller!$Supp1y

Username:
.\Administrator
Password:
d@gw00d

Username:
.\Administrator
Password:
K3ller!$Supp1y

Attributes

enable_network_discovery
true
enable_self_propagation
false
enable_set_wallpaper
true
extension
sykffle
note_file_name
RECOVER-${EXTENSION}-FILES.txt
note_full_text
>> Introduction Important files on your system was ENCRYPTED and now they have have "${EXTENSION}" extension. In order to recover your files you need to follow instructions below. >> Sensitive Data Sensitive data on your system was DOWNLOADED and it will be PUBLISHED if you refuse to cooperate. Data includes: - Employees personal data, CVs, DL, SSN. - Complete network map including credentials for local and remote services. - Financial information including clients data, bills, budgets, annual reports, bank statements. - Complete datagrams/schemas/drawings for manufacturing in solidworks format - And more... Private preview is published here: http://zujgzbu5y64xbmvc42addp4lxkoosb4tslf5mehnh7pvqjpwxn5gokyd.onion/b21e1fb6-ff88-425b-8339-3523179a1e3e/886cf430a907bbe9a3fd38fb704d524dbd199c1b042ad6f65dc72ad78704e21 >> CAUTION DO NOT MODIFY FILES YOURSELF. DO NOT USE THIRD PARTY SOFTWARE TO RESTORE YOUR DATA. YOU MAY DAMAGE YOUR FILES, IT WILL RESULT IN PERMANENT DATA LOSS. YOUR DATA IS STRONGLY ENCRYPTED, YOU CAN NOT DECRYPT IT WITHOUT CIPHER KEY. >> Recovery procedure Follow these simple steps to get in touch and recover your data: 1) Download and install Tor Browser from: https://torproject.org/ 2) Navigate to: http://mu75ltv3lxd24dbyu6gtvmnwybecigs5auki7fces437xvvflzva2nqd.onion/?access-key=${ACCESS_KEY}

rsa_pubkey.plain

Extracted

Path

C:\RECOVER-sykffle-FILES.txt

Ransom Note

>> Introduction Important files on your system was ENCRYPTED and now they have have "sykffle" extension. In order to recover your files you need to follow instructions below. >> Sensitive Data Sensitive data on your system was DOWNLOADED and it will be PUBLISHED if you refuse to cooperate. Data includes: - Employees personal data, CVs, DL, SSN. - Complete network map including credentials for local and remote services. - Financial information including clients data, bills, budgets, annual reports, bank statements. - Complete datagrams/schemas/drawings for manufacturing in solidworks format - And more... Private preview is published here: http://zujgzbu5y64xbmvc42addp4lxkoosb4tslf5mehnh7pvqjpwxn5gokyd.onion/b21e1fb6-ff88-425b-8339-3523179a1e3e/886cf430a907bbe9a3fd38fb704d524dbd199c1b042ad6f65dc72ad78704e21 >> CAUTION DO NOT MODIFY FILES YOURSELF. DO NOT USE THIRD PARTY SOFTWARE TO RESTORE YOUR DATA. YOU MAY DAMAGE YOUR FILES, IT WILL RESULT IN PERMANENT DATA LOSS. YOUR DATA IS STRONGLY ENCRYPTED, YOU CAN NOT DECRYPT IT WITHOUT CIPHER KEY. >> Recovery procedure Follow these simple steps to get in touch and recover your data: 1) Download and install Tor Browser from: https://torproject.org/ 2) Navigate to: http://mu75ltv3lxd24dbyu6gtvmnwybecigs5auki7fces437xvvflzva2nqd.onion/?access-key=o4vkB35mK95%2Fk%2F6LXtvFewoSfmQmAYSoQ4F9vLvvtZCqUEf5IrZprdiYt3GSEvaowin2agKM%2FytyWC8pcB%2BGrd8LgqM9BeJR1LjJaDVIwPIuyOy61VCBqNSd2AKNwaj3gWHiFHnD9W10r3yc8c%2F2COSIxgv7uL%2FLp3pI0rdhB00h4wcm53qbAwKfgsSNQaFHccrqm4NgBLgMER4CVOkfblottmByOxSZHlQjXD8GN8Pf1Y04EQCvgJAewpu2oDIMrSu7gUOrKwaRjZtkvJp90GgHr9uGLWc2p71G9yq06ka6mwpET7ZI15XlKnELUL7qm1Ewkqt%2Bsjkzey9wJZceEg%3D%3D

URLs

http://zujgzbu5y64xbmvc42addp4lxkoosb4tslf5mehnh7pvqjpwxn5gokyd.onion/b21e1fb6-ff88-425b-8339-3523179a1e3e/886cf430a907bbe9a3fd38fb704d524dbd199c1b042ad6f65dc72ad78704e21

http://mu75ltv3lxd24dbyu6gtvmnwybecigs5auki7fces437xvvflzva2nqd.onion/?access-key=o4vkB35mK95%2Fk%2F6LXtvFewoSfmQmAYSoQ4F9vLvvtZCqUEf5IrZprdiYt3GSEvaowin2agKM%2FytyWC8pcB%2BGrd8LgqM9BeJR1LjJaDVIwPIuyOy61VCBqNSd2AKNwaj3gWHiFHnD9W10r3yc8c%2F2COSIxgv7uL%2FLp3pI0rdhB00h4wcm53qbAwKfgsSNQaFHccrqm4NgBLgMER4CVOkfblottmByOxSZHlQjXD8GN8Pf1Y04EQCvgJAewpu2oDIMrSu7gUOrKwaRjZtkvJp90GgHr9uGLWc2p71G9yq06ka6mwpET7ZI15XlKnELUL7qm1Ewkqt%2Bsjkzey9wJZceEg%3D%3D

Targets

- Target
  
  blackcat.exe
- Size
  
  2.6MB
- MD5
  
  bb266486ee8ac70c0687989e02cefa14
- SHA1
  
  11203786b17bb3873d46acae32a898c8dac09850
- SHA256
  
  0c6f444c6940a3688ffc6f8b9d5774c032e3551ebbccb64e4280ae7fc1fac479
- SHA512
  
  a167779fc95a5cf0a3eff86211e9e08c282470e050b17ae62c7499a82ea59b3447446eafea9d7b5c5ba833b7a2d060f76530b00509dd5ff7904a0735d83e14c4
- SSDEEP
  
  49152:rEqvaaAjc2hdKjb8WXqE1PiEbE/TKMt3/RgaJ2wW4PRT8O1:rbyaALKjwWXV1P9oVvwwW4JT8
Score

10^/10

blackcat ransomware discovery evasion trojan
- BlackCat
  A Rust-based ransomware sold as RaaS first seen in late 2021.
  ransomware blackcat
- Deletes shadow copies
  Ransomware often targets backup files to inhibit system recovery.
  ransomware
- Renames multiple (152) files with added filename extension
  This suggests ransomware activity of encrypting all the files on the system.
  ransomware
- Disables taskbar notifications via registry modification
  evasion
- Executes dropped EXE
- Windows security modification
  evasion trojan
- Checks installed software on the system
  Looks up Uninstall key entries in the registry to enumerate software on the system.
  discovery
- Enumerates connected drives
  Attempts to read the root path of hard drives other than the default C: drive.
- Drops file in System32 directory
- Sets desktop wallpaper using registry
  ransomware
behavioral1 behavioral2