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Windows Analysis Report 746353_invoice_copy.vbs
Overview
General Information
| Sample Name: | 746353_invoice_copy.vbs |
| Analysis ID: | 483641 |
| MD5: | de2cd7af58b26e8d00c8c8525918babe |
| SHA1: | e5d97879ab42a0ee8d65b77fa073b90132c68199 |
| SHA256: | 7d9d787a5341fd11604a2d10f739f283d7caa351fc67e3080bfcc15526496222 |
| Tags: | NanoCorevbs |
| Infos: | |
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Most interesting Screenshot:  |
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Detection
Nanocore
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Sigma detected: NanoCore
VBScript performs obfuscated calls to suspicious functions
Detected Nanocore Rat
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Very long command line found
Injects a PE file into a foreign processes
Creates an undocumented autostart registry key
Sigma detected: CrackMapExec PowerShell Obfuscation
Hides that the sample has been downloaded from the Internet (zone.identifier)
Uses dynamic DNS services
Queries the volume information (name, serial number etc) of a device
Yara signature match
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
May sleep (evasive loops) to hinder dynamic analysis
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Uses insecure TLS / SSL version for HTTPS connection
Contains long sleeps (>= 3 min)
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Sigma detected: Encoded PowerShell Command Line
Java / VBScript file with very long strings (likely obfuscated code)
Detected TCP or UDP traffic on non-standard ports
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Creates a process in suspended mode (likely to inject code)
Found WSH timer for Javascript or VBS script (likely evasive script)
Classification
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| Uses insecure TLS / SSL version for HTTPS connection |
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| Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) |
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| Uses dynamic DNS services |
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| Internet Provider seen in connection with other malware |
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| JA3 SSL client fingerprint seen in connection with other malware |
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| HTTP GET or POST without a user agent |
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| IP address seen in connection with other malware |
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| Uses insecure TLS / SSL version for HTTPS connection |
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| Detected TCP or UDP traffic on non-standard ports |
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E-Banking Fraud: |
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| Wscript starts Powershell (via cmd or directly) |
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