Ransom.PS1.LOCKBIT.AA

它以文(wén)件的形式出现在系统中(zhōng)，可(kě)能(néng)是其他(tā)恶意软件投放的，或者是用(yòng)户在访问恶意网站时无意中(zhōng)下载的。

???????

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

??

???????:

• %Program Data%\{4 random characters}.tmp
• %Program Data%\Ck8GvVQ9E.ico
  
• %System Root%\{8 random characters}\{random}.tmp ? deleted afterwards

???????:

• %Program Data%\{4 random characters}.tmp

????????:

• %System Root%\{8 random characters}

(??: %System Root% ?????,???? C:\??????????????)

??????

???????????????????:

HKEY_LOCALMACHINE\SOFTWARE\Classes\
Ck8GvVQ9E\DefaultIcon
(Default) = %ProgramData%Ck8GvVQ9E.ico

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.Ck8GvVQ9E
(Default) = Ck8GvVQ9E

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer
GlobalAssocChangedCounter = 0x00000027(39)

?????????????????????:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.Ck8GvVQ9E

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Ck8GvVQ9E

HKEY_LOCALMACHINE\SOFTWARE\Classes\
Ck8GvVQ9E\DefaultIcon

???????????,??????:

HKEY_CURRENT_USER\Control Panel\Desktop
WallPaper = %ProgramData%\Ck8GvVQ9E.bmp

HKEY_CURRENT_USER\Control Panel\Desktop
WallpaperStyle = 10

????????????????:

• %Program Data%\Ck8GvVQ9E.bmp
  

????

????????????????????:

• agntsvc
• dbeng50
• dbsnmp
• encsvc
• excel
• firefox
• infopath
• isqlplussvc
• msaccess
• mspub
• mydesktopqos
• mydesktopservice
• notepad
• ocautoupds
• ocomm
• ocssd
• onenote
• oracle
• outlook
• powerpnt
• sqbcoreservice
• sql
• steam
• synctime
• tbirdconfig
• thebat
• thunderbird
• visio
• winword
• wordpad
• xfssvccon

??????

?????????:

• If not executed with admin rights, it will attempt relaunch itself as admin by elevating its privileges via bypassing UAC.
• It encrypts fixed, removable, and network drives
• It deletes files in recycle bin folder for removable and fixed drives
• 它使用(yòng) WQL 来删除快照副本
• It terminates if the machine has the following system language:
  • Arabic (Syria)
  • Armenian
  • Azeri (Cyrillic)
  • Azeri (Latin)
  • Belarusian
  • Georgian
  • Kazakh
  • Kyrgyz (Cyrillic)
  • Romanian (Moldova)
  • Russian
  • Russian (Moldova)
  • Tajik
  • Tatar
  • Turkmen
  • Ukrainian
  • Uzbek (Cyrillic)
  • Uzbek (Latin)
• It deletes services with the following strings:
  • backup
  • GxBlr
  • GxCIMgr
  • GxCVD
  • GxFWD
  • GxVss
  • memtas
  • mepocs
  • msexchange
  • sophos
  • sql
  • svc$
  • veeam
  • vss
• It deletes the following services:
  • WdBoot
  • WdFilter
  • WdNisDrv
  • WdNisSvc
  • WinDefend
  • wscsvc
  • sppsvc
  • Sense
  • SecurityHealthService
• Change the icon of encrypted file with %ProgramData%\Ck8GvVQ9E.ico