Analysis
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max time kernel
100s -
max time network
103s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
17-09-2021 05:42
Static task
static1
Behavioral task
behavioral1
Sample
957675e7fd1d1cb50f3252d3950d77ec1e37c3004c5da39674e03a817e9ba7f9.dll
Resource
win7-en-20210916
Behavioral task
behavioral2
Sample
957675e7fd1d1cb50f3252d3950d77ec1e37c3004c5da39674e03a817e9ba7f9.dll
Resource
win10v20210408
General
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Target
957675e7fd1d1cb50f3252d3950d77ec1e37c3004c5da39674e03a817e9ba7f9.dll
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Size
215KB
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MD5
c7d52ab979c73fc11e00c7ad32a2ee6c
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SHA1
ef750a4dfa69a0108e72306dc2ed53e13ed38c2d
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SHA256
957675e7fd1d1cb50f3252d3950d77ec1e37c3004c5da39674e03a817e9ba7f9
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SHA512
afb752109186f18742ef44f0c13e10273209069e894979560c03d184949ce39201d28179f117f5206a1212268f00f3a1b0c4eabed852e3206985c11501bc158e
Malware Config
Extracted
C:\readme.txt
conti
http://contirecj4hbzmyzuydyzrvm2c65blmvhoj2cvf25zqj2dwrrqcq5oad.onion/
https://contirecovery.click
Signatures
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Conti Ransomware
Ransomware generally thought to be a successor to Ryuk.
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Modifies extensions of user files 10 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
regsvr32.exedescription ioc process File renamed C:\Users\Admin\Pictures\PublishPush.png => C:\Users\Admin\Pictures\PublishPush.png.LLVXT regsvr32.exe File renamed C:\Users\Admin\Pictures\SaveUnblock.tif => C:\Users\Admin\Pictures\SaveUnblock.tif.LLVXT regsvr32.exe File renamed C:\Users\Admin\Pictures\ShowLimit.png => C:\Users\Admin\Pictures\ShowLimit.png.LLVXT regsvr32.exe File opened for modification C:\Users\Admin\Pictures\ClearMeasure.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\ClearMeasure.tiff => C:\Users\Admin\Pictures\ClearMeasure.tiff.LLVXT regsvr32.exe File opened for modification C:\Users\Admin\Pictures\CompressCheckpoint.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\SkipGet.crw => C:\Users\Admin\Pictures\SkipGet.crw.LLVXT regsvr32.exe File renamed C:\Users\Admin\Pictures\CompressCheckpoint.tiff => C:\Users\Admin\Pictures\CompressCheckpoint.tiff.LLVXT regsvr32.exe File renamed C:\Users\Admin\Pictures\EnterRead.png => C:\Users\Admin\Pictures\EnterRead.png.LLVXT regsvr32.exe File renamed C:\Users\Admin\Pictures\ReceiveConvert.png => C:\Users\Admin\Pictures\ReceiveConvert.png.LLVXT regsvr32.exe -
Drops startup file 1 IoCs
Processes:
regsvr32.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\readme.txt regsvr32.exe -
Drops desktop.ini file(s) 32 IoCs
Processes:
regsvr32.exedescription ioc process File opened for modification C:\Users\Public\Libraries\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Links\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Videos\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Pictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Videos\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\AccountPictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Documents\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Music\desktop.ini regsvr32.exe File opened for modification C:\Program Files (x86)\Common Files\Microsoft Shared\Stationery\Desktop.ini regsvr32.exe File opened for modification C:\Program Files\desktop.ini regsvr32.exe File opened for modification C:\Program Files (x86)\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini regsvr32.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Music\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Downloads\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\DataServices\DESKTOP.INI regsvr32.exe File opened for modification C:\Users\Public\Desktop\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Searches\desktop.ini regsvr32.exe File opened for modification C:\Program Files\Common Files\microsoft shared\Stationery\Desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Documents\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini regsvr32.exe -
Drops file in Program Files directory 64 IoCs
Processes:
regsvr32.exedescription ioc process File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\pages-app\images\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\app-center\js\nls\sk-sk\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\images\themeless\Appstore\Download_on_the_App_Store_Badge_zh_cn_135x40.svg regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Grace-ul-oob.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_PrepidBypass-ul-oob.xrm-ms regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\Annotations\readme.txt regsvr32.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Web Server Extensions\readme.txt regsvr32.exe File opened for modification C:\Program Files\Mozilla Firefox\firefox.VisualElementsManifest.xml regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\playlist\newgrounds.luac regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\send-for-sign\images\themes\dark\progress.gif regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\nls\uk-ua\readme.txt regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\modules\common.luac regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\locale\sk\LC_MESSAGES\vlc.mo regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\js\plugin.js regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\desktop-connector-files\js\nls\tr-tr\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_KMS_Client-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LivePersonaCard\lpc.win32.bundle regsvr32.exe File created C:\Program Files\Google\Chrome\Application\89.0.4389.114\MEIPreload\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\cardview-warning.png regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\ka\LC_MESSAGES\readme.txt regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\meta\art\03_lastfm.luac regsvr32.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000042\assets\assets\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\combinepdf\images\rhp_world_icon_hover_2x.png regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_OEM_Perp3-ul-phn.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_SubTrial2-pl.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\Outlook2019R_OEM_Perp-ul-oob.xrm-ms regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Resource\Font\SY______.PFB regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\nls\fi-fi\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\HintBarEllipses.16.GrayF.png regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\win8-scrollbar\arrow-up.gif regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\add-comment.png regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\add-account\js\nls\es-es\readme.txt regsvr32.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.ecf.filetransfer.httpclient4.ssl.feature_1.0.0.v20140827-1444\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-modules-editor-mimelookup-impl_zh_CN.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\plugins\tracked-send\css\home-view.css regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\plugins\tracked-send\js\nls\ko-kr\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_Subscription-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL016.XML regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\favicon.ico regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.core.commands.nl_zh_4.4.0.v20140623020002.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\combinepdf\images\rhp_world_icon_2x.png regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-recent-files-select\js\plugin.js regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\nls\sl-sl\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\signatures\js\nls\zh-tw\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jre1.8.0_66\lib\fontconfig.bfc regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalPipcR_OEM_Perp-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\playlist\liveleak.luac regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.ecf.provider.filetransfer.httpclient4_1.0.800.v20140827-1444.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\digsig\js\nls\nb-no\ui-strings.js regsvr32.exe File created C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\readme.txt regsvr32.exe File opened for modification C:\Program Files\Google\Chrome\Application\89.0.4389.114\Locales\ta.pak regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-core-ui_zh_CN.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\next-arrow-default.svg regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\config\Modules\org-netbeans-modules-sendopts.xml regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\Checkmark.png regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\walk-through\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\pages-app\css\main.css regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\db\NOTICE regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalR_OEM_Perp-ul-phn.xrm-ms regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Tracker\readme.txt regsvr32.exe File created C:\Program Files (x86)\Common Files\Microsoft Shared\VSTA\Pipeline.v10.0\AddInSideAdapters\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\aicuc\images\themes\dark\warning_2x.png regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\walk-through\images\themeless\close.svg regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\Standard2019VL_MAK_AE-ul-oob.xrm-ms regsvr32.exe -
Drops file in Windows directory 1 IoCs
Processes:
svchost.exedescription ioc process File opened for modification C:\Windows\Debug\ESE.TXT svchost.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
regsvr32.exepid process 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe 4800 regsvr32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
ShellExperienceHost.exepid process 4240 ShellExperienceHost.exe 4240 ShellExperienceHost.exe
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\957675e7fd1d1cb50f3252d3950d77ec1e37c3004c5da39674e03a817e9ba7f9.dll1⤵
- Modifies extensions of user files
- Drops startup file
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe"C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca1⤵
- Suspicious use of SetWindowsHookEx
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k appmodel -s tiledatamodelsvc1⤵
- Drops file in Windows directory