Ransom.Win32.LOCKBIT.YXECF

它以文件的形式出现在系统中，可能是其他恶意软件投放的，或者是用户在访问恶意网站时无意中下载的。

新病毒详细信息

它以文件的形式出现在系统中，可能是其他恶意软件投放的，或者是用户在访问恶意网站时无意中下载的。

安装

它植入下列文件：

• %ProgramData%\4adERwmcM.ico → icon of encrypted files
• %ProgramData%\4adERwmcM.bmp → desktop wallpaper after encryption

它添加下列进程：

• bcdedit /set {current} safeboot network → if -safe commandline parameter is used.

它添加下列互斥条目，确保一次只会运行一个副本：

• Global\{generated hash}

其他系统修改

它添加下列注册表项：

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.4adERwmcM
{Default} = 4adERwmcM

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
4adERwmcM\DefaultIcon
{Default} = C:\ProgramData\4adERwmcM.ico

它通过修改下列注册表项，更改桌面壁纸：

HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = %ProgramData%\4adERwmcM.bmp

HKEY_CURRENT_USER\Control Panel\Desktop
WallpaperStyle = 10

它将系统的桌面壁纸设置为下列图像：

进程终止

它终止在受感染的系统上运行的下列服务：

• vss
• sql
• svc$
• memtas
• mepocs
• msexchange
• sophos
• veeam
• backup
• GxVss
• GxBlr
• GxFWD
• GxCVD
• GxCIMgr

它终止在受感染的系统内存中运行的下列进程：

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

信息窃取

它收集下列数据:

• Hostname
• Username
• OS version
• Domain
• Architecture
• Language

其他详细信息

它添加下列注册表键值:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.4adERwmcM

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
4adERwmcM\DefaultIcon

该程序执行以下操作：

• If not executed with admin rights, it will attempt to relaunch itself as admin by elevating its privileges via bypassing UAC
• It encrypts fixed, removable and network shares
• It deletes files in recycle bin folder for removable and fixed drives
• 它使用 WQL 来删除快照副本
• It renames itself 26 times before deleting itself after encryption
• It has the capability to print the ransom note in infected machines
• It terminates if the machine has the following system language:
  • Arabic (Syria)
  • Armenian (Armenia)
  • Azerbaijani (Cyrillic Azerbaijan)
  • Azerbaijani (Latin Azerbaijan)
  • Belarusian (Belarus)
  • Georgian (Georgia)
  • Kazakh (Kazakhstan)
  • Kyrgyz (Kyrgyzstan)
  • Russian (Moldova)
  • Russian (Russia)
  • Tajik (Cyrillic Tajikistan)
  • Tatar (Russia)
  • Romanian (Moldova)
  • Turkmen (Turkmenistan)
  • Ukranian (Ukraine)
  • Uzbek (Cyrillic Uzbekistan)
  • Uzbek (Latin Uzbekistan)
• It deletes the following services:
  • WdBoot
  • WdFilter
  • WdNisDrv
  • WdNisSvc
  • WinDefend
  • wscsvc
  • sppsvc
  • Sense
  • SecurityHealthService
• It changes the encrypted file icon to the following image:
  
  
• It duplicates the token of the following:
  • explorer.exe - to gain privileged domain access
  • lsass.exe
  • TrustedInstaller - service is started if not yet running
• It contains a list of username:password that it will use to log into domain controllers.