Trellix Insights: SVCReady Loader Hidden in Document Properties
Technical Articles ID:
KB95854
Last Modified: 2022-08-22 09:55:09 Etc/GMT
Last Modified: 2022-08-22 09:55:09 Etc/GMT
Environment
IMPORTANT: This Knowledge Base article discusses a specific threat that is being automatically tracked by Trellix Insights technology. The content is intended for use by Trellix Insights users, but is provided for general knowledge to all customers. Contact us for more information about Trellix Insights.
Summary
Description of Campaign
A phishing campaign was identified to deliver malware via shellcode hidden in the properties section of MS Office documents. Upon opening the document, shellcode is run via a VBA AutoOpen macro that drops the SVCReady payload to the temp directory and executes. The malware then performs system checks, gathers system information, and exfiltrates the data encrypted with an RC4 algorithm to the C2 attacker over HTTP. Additional instructions and payloads may be obtained from C2, such as in an earlier investigation where the RedLine Stealer payload was delivered to the infected machine. While correlations can be made between past TA551 events and the current SVCReady campaign, no definitive attribution was made.
Our ATR team gathers and analyzes information from multiple open and closed sources before disseminating intelligence reports. This campaign was researched by HP and shared publicly.
How to use this article:
Campaign IOC
Minimum Content Versions
Detection Summary
Minimum set of Manual Rules to improve protection to block this campaign:
IMPORTANT: Always follow best practices when you enable new rules and signatures.
When you implement new rules or signatures, always set them to Report mode first and check the alerts generated. Resolve any issues that arise and then set the rules to Block. This step mitigates against triggering false positives and allows you to refine your configuration.
For more information, see KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.
Endpoint Security - Advanced Threat Protection:Rule ID: 239 Identify suspicious command parameter execution
Rule ID: 258 Detect most likely masqueraded files which can result in suspicious process launches
Rule ID: 263 Detect processes accessing suspicious URLs
Rule ID: 4 Use GTI file reputation to identify trusted or malicious files
Endpoint Security - Exploit Prevention:Rule ID: 6143 T1003 - Attempt to Dump Password Hash from SAM Database
Rule ID: 6086 PowerShell Command Restriction - Command
Rule ID: 2844 Microsoft Word WordPerfect5 Converter Module Buffer Overflow Vulnerability
Rule ID: 6135 Unmanaged PowerShell Detected
Rule ID: 8004 Fileless Threat: Malicious PowerShell Behavior Detected
Rule ID: 6127 Suspicious LSASS Access from PowerShell
Rule ID: 6113 T1055 - Fileless Threat: Reflective Self Injection
Host Intrusion Prevention:Rule ID: 3814 Microsoft Word Enveloping - Illegal file creation
Rule ID: 6081 PowerShell Command Restriction - NoProfile
Rule ID: 6083 PowerShell Command Restriction - NonInteractive
Rule ID: 6070 Hidden PowerShell Detected
Rule ID: 2844 Microsoft Word WordPerfect5 Converter Module Buffer Overflow Vulnerability
Rule ID: 6135 Unmanaged PowerShell Detected
Rule ID: 6113 T1055 - Fileless Threat: Reflective Self Injection
Aggressive set of Manual Rules to improve protection to block this campaign:
IMPORTANT: Always follow best practices when you enable new rules and signatures.
When you implement new rules or signatures, always set them to Report mode first and check the alerts generated. Resolve any issues that arise and then set the rules to Block. This step mitigates against triggering false positives and allows you to refine your configuration.
For more information, see KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.
VirusScan Enterprise - Access Protection Rules:Prevent programs registering as a service
Prevent creation of new executable files in the Windows folder
Host Intrusion Prevention:Rule ID: 1020 Windows Agent Shielding - File Access
Rule ID: 1148 CMD Tool Access by a Network Aware Application
Rule ID: 428 Generic Buffer Overflow
Rule ID: 6010 Generic Application Hooking Protection
Rule ID: 2265 Delay Delete File Protection
Rule ID: 6011 Generic Application Invocation Protection
Rule ID: 2806 Attempt to create a hardlink to a file
Rule ID: 412 Double File Extension Execution
Endpoint Security - Access Protection Rules:Creating new executable files in the Windows folder
A phishing campaign was identified to deliver malware via shellcode hidden in the properties section of MS Office documents. Upon opening the document, shellcode is run via a VBA AutoOpen macro that drops the SVCReady payload to the temp directory and executes. The malware then performs system checks, gathers system information, and exfiltrates the data encrypted with an RC4 algorithm to the C2 attacker over HTTP. Additional instructions and payloads may be obtained from C2, such as in an earlier investigation where the RedLine Stealer payload was delivered to the infected machine. While correlations can be made between past TA551 events and the current SVCReady campaign, no definitive attribution was made.
Our ATR team gathers and analyzes information from multiple open and closed sources before disseminating intelligence reports. This campaign was researched by HP and shared publicly.
How to use this article:
- If a Threat Hunting table has been created, use the rules contained to search for malware related to this campaign.
- Review the product detection table and confirm that your environment is at least on the specified content version.
To download the latest content versions, go to the Security Updates page. - Scroll down and review the "Product Countermeasures" section of this article. Consider implementing them if they are not already in place.
- Review
KB91836 - Countermeasures for entry vector threats . - Review KB87843 - Dynamic Application Containment rules and best practices.
- Review KB82925 - Identify what rule corresponds to an Adaptive Threat Protection and Threat Intelligence Exchange event.
Campaign IOC
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Minimum set of Manual Rules to improve protection to block this campaign:
IMPORTANT: Always follow best practices when you enable new rules and signatures.
When you implement new rules or signatures, always set them to Report mode first and check the alerts generated. Resolve any issues that arise and then set the rules to Block. This step mitigates against triggering false positives and allows you to refine your configuration.
For more information, see KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.
Endpoint Security - Advanced Threat Protection:
Rule ID: 258 Detect most likely masqueraded files which can result in suspicious process launches
Rule ID: 263 Detect processes accessing suspicious URLs
Rule ID: 4 Use GTI file reputation to identify trusted or malicious files
Endpoint Security - Exploit Prevention:
Rule ID: 6086 PowerShell Command Restriction - Command
Rule ID: 2844 Microsoft Word WordPerfect5 Converter Module Buffer Overflow Vulnerability
Rule ID: 6135 Unmanaged PowerShell Detected
Rule ID: 8004 Fileless Threat: Malicious PowerShell Behavior Detected
Rule ID: 6127 Suspicious LSASS Access from PowerShell
Rule ID: 6113 T1055 - Fileless Threat: Reflective Self Injection
Host Intrusion Prevention:
Rule ID: 6081 PowerShell Command Restriction - NoProfile
Rule ID: 6083 PowerShell Command Restriction - NonInteractive
Rule ID: 6070 Hidden PowerShell Detected
Rule ID: 2844 Microsoft Word WordPerfect5 Converter Module Buffer Overflow Vulnerability
Rule ID: 6135 Unmanaged PowerShell Detected
Rule ID: 6113 T1055 - Fileless Threat: Reflective Self Injection
Aggressive set of Manual Rules to improve protection to block this campaign:
IMPORTANT: Always follow best practices when you enable new rules and signatures.
When you implement new rules or signatures, always set them to Report mode first and check the alerts generated. Resolve any issues that arise and then set the rules to Block. This step mitigates against triggering false positives and allows you to refine your configuration.
For more information, see KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.
VirusScan Enterprise - Access Protection Rules:
Prevent creation of new executable files in the Windows folder
Host Intrusion Prevention:
Rule ID: 1148 CMD Tool Access by a Network Aware Application
Rule ID: 428 Generic Buffer Overflow
Rule ID: 6010 Generic Application Hooking Protection
Rule ID: 2265 Delay Delete File Protection
Rule ID: 6011 Generic Application Invocation Protection
Rule ID: 2806 Attempt to create a hardlink to a file
Rule ID: 412 Double File Extension Execution
Endpoint Security - Access Protection Rules:
