The North Korea-linked threat actor known as Kimsuky (aka Black Banshee, Emerald Sleet, or Springtail) has been observed shifting its tactics, leveraging Compiled HTML Help (CHM) files as vectors to deliver malware for harvesting sensitive data.
Kimsuky, active since at least 2012, is known to target entities located in South Korea as well as North America, Asia, and Europe.
According

The North Korea-linked threat actor known as Kimsuky (aka Black Banshee, Emerald Sleet, or Springtail) has been observed shifting its tactics, leveraging Compiled HTML Help (CHM) files as vectors to deliver malware for harvesting sensitive data.
Kimsuky, active since at least 2012, is known to target entities located in South Korea as well as North America, Asia, and Europe.
According