General
- Target 2026-06-28_a787fea60f9759a3e5ddec34d9563141_elex_virlock
- Size 4.0MB
- Sample260628-yr6ltac17t
- SHA256 b4d752f92c7ffd93d0801447e062f18b5c53bf8b2a939af30f29d969bea44e57
Score
10/10
Malware Config
Targets
-
- Target 2026-06-28_a787fea60f9759a3e5ddec34d9563141_elex_virlock
- Size 4.0MB
- SHA256 b4d752f92c7ffd93d0801447e062f18b5c53bf8b2a939af30f29d969bea44e57
Score10/10-
Family: Nabucur
Nabucur is a ransomware first seen in 2015.
-
Modifies visibility of file extensions in Explorer
-
UAC bypass
-
Detects executables containing URLs to raw contents of a Github gist
-
Detects executables embedding registry key / value combination indicative of disabling Windows Defen
-
Renames multiple (146) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Executes dropped EXE
-
Reads user/profile data of web browsers
Infostealers often target stored browser data, which can include saved credentials etc.
-
Adds Run key to start application
-
Drops file in System32 directory
MITRE ATT&CK Enterprise v16
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Hide Artifacts
1Hidden Files and Directories
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
4Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1