북 해킹조직, 대용량 악성LNK 파일을 이용한 공격 진행중!

2023-05-18 • ESTSecurity • North Korean hacking organization is conducting an attack using large malicious LNK files! •

https://blog.alyac.co.kr/5147

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ESRC warned that a North Korea-sponsored hacking group was abusing oversized LNK files in Korean-themed attacks after earlier Fair Trade Commission impersonation activity. The lures used current political and social topics such as the Washington Declaration and irregular tax-audit notices, padded the LNK files with large dummy data, and displayed HWP decoys while launching PowerShell or batch scripts. Execution downloaded additional shellcode or ran information-stealing and downloader scripts, with ALYac detecting the files as Trojan.Agent.LNK.Gen and Trojan.PowerShell.Agent. The report lists MD5 samples and infrastructure including OneDrive API delivery and centhosting.net endpoints, making oversized shortcut files a key defensive hunting clue.

Indicators of Compromise

Type Value First Seen Last Seen
HASH c0ac380c3dcf94eef84e40ef964a662… 2023-05-05 2023-11-24
URL http://centhosting.net/upload.p… 2023-05-05 2023-11-24
DOMAIN centhosting.net 2023-05-05 2023-11-24
HASH bcfb79ae18a05f190bb0805dd39502f… 2023-05-18 2023-07-11
HASH 2d381a0156d8b0468d10dfd347b32cf… 2023-05-18 2023-07-11
HASH aa76b4db29cf929b4b22457ccb8cd77… 2023-05-18 2023-05-18
HASH 44c412101b9da1f32570ce8ac03a727… 2023-05-18 2023-05-18
URL http://centhosting.net/list.php 2023-05-18 2023-05-18
URL https://1drv.ms/i/s!AhXEXLJSNMP… 2023-05-18 2023-05-18
URL https://api.onedrive.com/v1.0/s… 2023-05-18 2023-05-18
HASH 58d726099fdd9fdb8c34e96e13473aa4 2023-05-05 2023-05-18

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