The provided source material consists of a single technical analysis report generated by the Falcon Sandbox Hybrid Analysis service. The report details the behavior and characteristics of a submitted file, identified as "JVC_47247.vbs," a Visual Basic Script file. The document focuses exclusively on identifying malicious indicators, system hooks, and potential command and control communication methods associated with the file. It does not contain any information regarding consumer free samples, promotional offers, or brand freebies.
File Analysis and Characteristics
The analysis report identifies the file "JVC_47247.vbs" as a significant security concern. The file is described as a script file with a size of approximately 4.3 MiB (4,519,868 bytes). The content is noted as ASCII text containing very long lines. The file was analyzed in a Windows 7 32-bit environment.
System Modifications
A critical finding in the report is the detection of process hooking. The script wscript.exe was observed writing specific bytes to a virtual address within the module "NSI.DLL." This behavior is classified under the MITRE ATT&CK technique T1179 (Install Hooks). The relevance of this indicator is rated 10/10, suggesting a high confidence level that the file attempts to manipulate the running process to intercept system calls or maintain persistence.
Persistence and Execution
The report indicates the file has characteristics related to "Installation/Persistance" (likely a typo for Persistence). The file is flagged as possibly checking for known debuggers or analysis tools, a common evasion technique used by malware to avoid detection in sandboxed environments.
Command and Control Indicators
The source material highlights "Unusual Characteristics" that suggest the file contains indicators of bot communication commands. While the specific command structure is not detailed in the extracted text, the presence of this indicator implies that the script is designed to communicate with a remote server or await instructions. This falls under the "Remote Access Related" category.
Network and Communication Analysis
The analysis contains several references to the word "twitter" and "ntice." In the context of malware analysis, these strings are often obfuscated or part of the payload data. The report explicitly mentions a "Found a reference to a known community page" associated with one of the indicators. This suggests that the file or its infrastructure has been previously identified by the security community.
Conclusion
Based on the provided source material, the file "JVC_47247.vbs" is a malicious script designed to compromise system integrity through process hooking and potential remote access. The analysis confirms the installation of system hooks (T1179) and identifies indicators of botnet communication. The file employs evasion techniques by potentially checking for analysis tools. There is no information in the source data regarding legitimate consumer offers, free samples, or promotional programs.