General
- Target VirusShare_5c13ac1aba158dcc7a86ad4203fc30d0.zip
- Size 373KB
- Sample261006-rsljpsfc42
- SHA256 24f579159875e917a5ff57673ceb994851f1dbd5a0bbd3fae70d4ade3384026d
Malware Config
Targets
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- Target a1b35df47bad5fd0e105cfb397507d8297b2becde92da03c30395dbec63a26b4
- Size 443KB
- SHA256 a1b35df47bad5fd0e105cfb397507d8297b2becde92da03c30395dbec63a26b4
Score10/10-
Family: Nabucur
Nabucur is a ransomware first seen in 2015.
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Modifies visibility of file extensions in Explorer
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UAC bypass
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Renames multiple (135) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Badlisted process makes network request
Network request originating from process or tool commonly abused by malware.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Reads user/profile data of web browsers
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Drops file in System32 directory
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Executes a VBScript file via the Windows Script Host.
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2Visual Basic
1Windows Command Shell
1Privilege 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