Diving deep into North Korea's APT37 tool kit. [Research Saturday]
CyberWire Daily6 Maalis 2021

Diving deep into North Korea's APT37 tool kit. [Research Saturday]

Guest Hossein Jazi of Malwarebytes joins us to take a deep dive into North Korea's APT37 (aka ScarCruft, Reaper and Group123) toolkit. On December 7 2020 the Malwarebytes Labs threat team identified a malicious document uploaded to Virus Total which was purporting to be a meeting request likely used to target the government of South Korea. The meeting date mentioned in the document was 23 Jan 2020, which aligns with the document compilation time of 27 Jan 2020, indicating that this attack took place almost a year ago. The file contains an embedded macro that uses a VBA self decoding technique to decode itself within the memory spaces of Microsoft Office without writing to the disk. It then embeds a variant of the RokRat into Notepad. Based on the injected payload, the Malwarebytes team believes that this sample is associated with APT37. This North Korean group is also known as ScarCruft, Reaper and Group123 and has been active since at least 2012, primarily targeting victims in South Korea. The research can be found here: Retrohunting APT37: North Korean APT used VBA self decode technique to inject RokRat

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