Analysis
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max time kernel
117s -
max time network
127s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
17-12-2021 10:32
Static task
static1
Behavioral task
behavioral1
Sample
03597628e999d791f4cc442328024235db9a929467a62ef0a00c91a76161f0e1.dll
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
03597628e999d791f4cc442328024235db9a929467a62ef0a00c91a76161f0e1.dll
Resource
win10-en-20211208
General
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Target
03597628e999d791f4cc442328024235db9a929467a62ef0a00c91a76161f0e1.dll
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Size
190KB
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MD5
f61817daf163c6617b22418bc887b9d3
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SHA1
e78d49cd87c37659890603bee2acca888ab381fd
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SHA256
03597628e999d791f4cc442328024235db9a929467a62ef0a00c91a76161f0e1
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SHA512
3e0cd971b6d5d3721f710a7814b320596541bcb7f021f48353a0effc24282fa241c73ce5a76ef85ebffa686f1699ccab2e8c24ad20632461cc84e2befbd74366
Malware Config
Extracted
C:\readme.txt
conti
http://contirecj4hbzmyzuydyzrvm2c65blmvhoj2cvf25zqj2dwrrqcq5oad.onion/
https://contirecovery.ws
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 4 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
regsvr32.exedescription ioc process File opened for modification C:\Users\Admin\Pictures\ConvertToUnregister.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\ConvertToUnregister.tiff => C:\Users\Admin\Pictures\ConvertToUnregister.tiff.EYUTA regsvr32.exe File renamed C:\Users\Admin\Pictures\LimitSet.png => C:\Users\Admin\Pictures\LimitSet.png.EYUTA regsvr32.exe File renamed C:\Users\Admin\Pictures\UsePush.crw => C:\Users\Admin\Pictures\UsePush.crw.EYUTA 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:\Program Files (x86)\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\AccountPictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Desktop\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Downloads\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\Saved Pictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Searches\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Music\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Documents\desktop.ini regsvr32.exe File opened for modification C:\Program Files\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\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\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Videos\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\Desktop\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Music\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Pictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Videos\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\Pictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Libraries\desktop.ini regsvr32.exe File opened for modification C:\Program Files (x86)\Common Files\Microsoft Shared\Stationery\Desktop.ini regsvr32.exe -
Drops file in Program Files directory 64 IoCs
Processes:
regsvr32.exedescription ioc process File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.core.databinding.beans_1.2.200.v20140214-0004.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\S_IlluNoInternetConnection_120x80.svg regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\combinepdf\css\main-selector.css regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer-select\js\nls\hr-hr\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\InstallConvert.bmp regsvr32.exe File opened for modification C:\Program Files\Google\Chrome\Application\89.0.4389.114\Locales\nl.pak regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.core.databinding.beans.nl_zh_4.4.0.v20140623020002.jar regsvr32.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\vi\readme.txt regsvr32.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Analysis Services\AS OLEDB\140\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\img\tools\themes\dark\line_2x.png regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\locale\sk\LC_MESSAGES\vlc.mo regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Resource\TypeSupport\Unicode\Mappings\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\Providers\Plugins2\AdobeHunspellPlugin\Dictionaries\en_GB\affDescription.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\[email protected] regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\pages-app\images\themes\dark\rhp_world_icon_hover.png regsvr32.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\ipsfra.xml regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Document Themes 16\Facet.thmx regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\PowerPointVL_MAK-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.ecf.core.feature_1.1.0.v20140827-1444\META-INF\ECLIPSE_.SF regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\core_icons.png regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Retail-pl.xrm-ms regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\file_types\download.svg regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\digsig\images\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\ob-preview\js\plugin.js regsvr32.exe File created C:\Program Files (x86)\Internet Explorer\es-ES\readme.txt regsvr32.exe File opened for modification C:\Program Files\Google\Chrome\Application\89.0.4389.114\MEIPreload\preloaded_data.pb regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.text.nl_ja_4.4.0.v20140623020002.jar regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Resource\TypeSupport\Unicode\Mappings\Mac\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\apple-touch-icon-144x144-precomposed.png regsvr32.exe File opened for modification C:\Program Files\Java\jre1.8.0_66\lib\fonts\LucidaBrightRegular.ttf regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\sv\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroApp\ENU\UnifiedShare.aapp regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\update_tracking\com-sun-tools-visualvm-host.xml regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\home\js\nls\de-de\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\ipschs.xml regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019R_OEM_Perp-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL011.XML regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.osgi.services_3.4.0.v20140312-2051.jar regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\editpdf\js\plugins\rhp\readme.txt regsvr32.exe File opened for modification C:\Program Files\GroupJoin.temp regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\zh_CN\readme.txt regsvr32.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\ru\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\RICEPAPR\RICEPAPR.INF regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp-ul-oob.xrm-ms regsvr32.exe File created C:\Program Files\Microsoft Office\root\Office16\STARTUP\readme.txt regsvr32.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.equinox.p2.rcp.feature_1.2.0.v20140523-0116\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\signatures\images\bun.png regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sign-services-auth\js\nls\hr-hr\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\app-center\js\nls\ru-ru\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\unified-share\js\nls\tr-tr\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019VL_MAK_AE-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\VisioProCO365R_SubTrial-pl.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\config\Modules\com-sun-tools-visualvm-host.xml regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\s_auditreport_18.svg regsvr32.exe File created C:\Program Files (x86)\Common Files\Services\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-modules-autoupdate-ui_ja.jar regsvr32.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX86\Microsoft Shared\VBA\VBA7.1\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] 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\es-es\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\walk-through\js\nls\en-gb\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail3-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalPipcR_Grace-ppd.xrm-ms regsvr32.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\es\readme.txt regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\dialogs\equalizer_window.html regsvr32.exe -
Drops file in Windows directory 4 IoCs
Processes:
svchost.exesvchost.exeShellExperienceHost.exedescription ioc process File opened for modification C:\Windows\Debug\ESE.TXT svchost.exe File opened for modification C:\Windows\Debug\ESE.TXT svchost.exe File created C:\Windows\rescache\_merged\4183903823\97717462.pri ShellExperienceHost.exe File created C:\Windows\rescache\_merged\4032412167\2701812693.pri ShellExperienceHost.exe -
Modifies data under HKEY_USERS 4 IoCs
Processes:
svchost.exedescription ioc process Key created \REGISTRY\USER\S-1-5-19\Software\Classes\Local Settings\MuiCache svchost.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\OnDemandInterfaceCache svchost.exe Key created \REGISTRY\USER\S-1-5-19\Software\Microsoft\windows\CurrentVersion\Internet Settings\Connections svchost.exe Key created \REGISTRY\USER\S-1-5-19\Software\Classes\Local Settings\MuiCache\16\52C64B7E svchost.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
regsvr32.exepid process 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe 528 regsvr32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
ShellExperienceHost.exepid process 988 ShellExperienceHost.exe 988 ShellExperienceHost.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
regsvr32.exedescription pid process target process PID 3532 wrote to memory of 528 3532 regsvr32.exe regsvr32.exe PID 3532 wrote to memory of 528 3532 regsvr32.exe regsvr32.exe PID 3532 wrote to memory of 528 3532 regsvr32.exe regsvr32.exe
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\03597628e999d791f4cc442328024235db9a929467a62ef0a00c91a76161f0e1.dll1⤵
- Suspicious use of WriteProcessMemory
PID:3532 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\03597628e999d791f4cc442328024235db9a929467a62ef0a00c91a76161f0e1.dll2⤵
- Modifies extensions of user files
- Drops startup file
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
PID:528
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -s BITS1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
PID:1048
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C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe"C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca1⤵
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
PID:988
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k appmodel -s tiledatamodelsvc1⤵
- Drops file in Windows directory
PID:2852