- Distribution Method : Remote access through Remote Desktop Protocol(RDP) or Terminal Services
- MD5 : e978124749a375e4e70aa8bf44ca6e98
- Encrypted File Pattern : .id[<Random>-2275].[unlockfiles2021@cock.li].Acuff
- Malicious File Creation Location :
- C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\<Random>.exe
- C:\Users\%UserName%\AppData\Local\<Random>.exe
- C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\<Random>.exe
- C:\Users\%UserName%\Desktop\info.hta
- C:\Users\%UserName%\Desktop\info.txt
- C:\Users\Public\Desktop\info.hta
- C:\Users\Public\Desktop\info.txt
- <Drive Letter>:\info.hta
- <Drive Letter>:\info.txt
- Payment Instruction File : info.hta / info.txt
- Major Characteristics :
- Offline Encryption
- CrySis / Troldesh Ransomware series
- Block processes execution (isqlplussvc.exe, oracle.exe, sqlagent.exe, sqlbrowser.exe, sqlservr.exe, sqlwriter.exe 등) 실행 차단
- Disable system restore (vssadmin delete shadows /all /quiet, wmic shadowcopy delete, bcdedit /set {default} bootstatuspolicy ignoreallfailures, bcdedit /set {default} recoveryenabled no, wbadmin delete catalog -quiet)
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