In August, malware researchers at Proofpoint spotted a new
“In August 2019, the macros that make up WhiteShadow appeared in English-language
“The most recently observed versions of the
Experts believe that WhiteShadow is one component of a malware delivery service that includes a rented instance of Microsoft SQL Server to host various payloads retrieved by the
The macros observed in the campaigns, once enables, execute SQL queries to retrieve the malicious code, stored as ASCII-encoded strings, from Microsoft SQL Server databases controlled by threat actors.
The result of the query is written to disk as a PKZip archive of a Windows executable.
“Once extracted by the macro, the executable is run on the system to start installing malware, which is determined by the actor based on the script configuration stored in the malicious Microsoft Office attachments.”
Proofpoint warns that the Microsoft SQL technique is still a rarity in the threat landscape, but threat actors could
(SecurityAffairs – WhiteShadow, malware)