Analysis
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max time kernel
135s -
max time network
154s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
16/12/2021, 17:50
Static task
static1
Behavioral task
behavioral1
Sample
3db6e8df73f12b6a9fa9adb6ad87b017d530a9d736909338042735ed00a9463b.bin.dll
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
3db6e8df73f12b6a9fa9adb6ad87b017d530a9d736909338042735ed00a9463b.bin.dll
Resource
win10-en-20211208
General
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Target
3db6e8df73f12b6a9fa9adb6ad87b017d530a9d736909338042735ed00a9463b.bin.dll
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Size
190KB
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MD5
6a97f8afc1151619d5b119407faeb1ad
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SHA1
185d65eb755cee888508d07adad60b39e0be2210
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SHA256
3db6e8df73f12b6a9fa9adb6ad87b017d530a9d736909338042735ed00a9463b
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SHA512
6e46da8df1ea210b8458f690b9b9951d02800190571a29ed71ac5f1d613bd77525cdf129a450c9bf155e4ca957a11ab5f254aeaa06b66faf62dcb36d2dfa94f1
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 15 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\AssertRemove.raw => C:\Users\Admin\Pictures\AssertRemove.raw.NKDLO regsvr32.exe File opened for modification C:\Users\Admin\Pictures\PingSync.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\WriteLimit.raw => C:\Users\Admin\Pictures\WriteLimit.raw.NKDLO regsvr32.exe File renamed C:\Users\Admin\Pictures\FormatRegister.crw => C:\Users\Admin\Pictures\FormatRegister.crw.NKDLO regsvr32.exe File renamed C:\Users\Admin\Pictures\PingSync.tiff => C:\Users\Admin\Pictures\PingSync.tiff.NKDLO regsvr32.exe File renamed C:\Users\Admin\Pictures\UninstallWatch.raw => C:\Users\Admin\Pictures\UninstallWatch.raw.NKDLO regsvr32.exe File opened for modification C:\Users\Admin\Pictures\InstallConfirm.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\OptimizeDeny.png => C:\Users\Admin\Pictures\OptimizeDeny.png.NKDLO regsvr32.exe File renamed C:\Users\Admin\Pictures\SendGrant.png => C:\Users\Admin\Pictures\SendGrant.png.NKDLO regsvr32.exe File renamed C:\Users\Admin\Pictures\WriteJoin.tiff => C:\Users\Admin\Pictures\WriteJoin.tiff.NKDLO regsvr32.exe File opened for modification C:\Users\Admin\Pictures\WriteJoin.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\EnterEdit.raw => C:\Users\Admin\Pictures\EnterEdit.raw.NKDLO regsvr32.exe File renamed C:\Users\Admin\Pictures\GetCompress.raw => C:\Users\Admin\Pictures\GetCompress.raw.NKDLO regsvr32.exe File renamed C:\Users\Admin\Pictures\InstallConfirm.tiff => C:\Users\Admin\Pictures\InstallConfirm.tiff.NKDLO regsvr32.exe File renamed C:\Users\Admin\Pictures\UnlockLimit.tif => C:\Users\Admin\Pictures\UnlockLimit.tif.NKDLO regsvr32.exe -
Drops startup file 1 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\readme.txt regsvr32.exe -
Drops desktop.ini file(s) 32 IoCs
description ioc Process File opened for modification C:\Users\Admin\Links\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Documents\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Videos\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Videos\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\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\Saved Games\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Desktop\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Documents\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Libraries\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\AccountPictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Pictures\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\Contacts\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\OneDrive\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini regsvr32.exe File opened for modification C:\Program Files (x86)\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Downloads\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:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini regsvr32.exe File opened for modification C:\Program Files\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Music\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Music\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\Downloads\desktop.ini regsvr32.exe -
Drops file in Program Files directory 64 IoCs
description ioc Process File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_SubTrial2-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\SkypeServiceBypassR_PrepidBypass-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL095.XML regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Analysis Services\AS OLEDB\140\Resources\1033\msmdsrv.rll regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\nls\pt-br\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\VisioStdXC2RVL_MAKC2R-ul-phn.xrm-ms regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\createpdfupsell-app\js\nls\pl-pl\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\ob-preview\js\nls\hu-hu\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\js\nls\en-gb\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_OEM_Perp-ul-oob.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\msoutilstat.etw.man regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\jre\lib\fonts\LucidaBrightRegular.ttf regsvr32.exe File created C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\es\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 opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.emf.common_2.10.1.v20140901-1043\META-INF\ECLIPSE_.SF regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\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\circle.cur regsvr32.exe File opened for modification C:\Program Files\ImportSwitch.ppsm regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\OFFSYMT.TTF regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\officeinventoryagentfallback.xml regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\digsig\js\selector.js regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer-select\css\main.css regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\generic-rhp-app\images\themes\dark\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\scan-files\images\themeless\Playstore\zh-tw_get.svg regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\js\nls\ar-ae\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp4-ul-phn.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial4-ppd.xrm-ms regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\sv\readme.txt regsvr32.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\ARCTIC\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\search-summary\css\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\combinepdf\js\nls\sl-si\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\db\lib\derbyLocale_es.jar regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.contrast-black_scale-140.png regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer\js\nls\hr-hr\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\org-netbeans-modules-options-api.jar regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\css\app\readme.txt regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\bs\LC_MESSAGES\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\createpdfupsell-app\js\nls\fr-fr\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019R_Retail-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-core-multiview_ja.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\files\dev\nls\pt-br\ui-strings.js regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\exportpdfupsell-app\js\nls\en-ae\ui-strings.js regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\Localized_images\ja-jp\PlayStore_icon.svg regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\FPA_f33\FA000000033 regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\exportpdfupsell-app\images\themes\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\Localized_images\cs-cz\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\viewer\nls\fr-ma\readme.txt regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\ckb\LC_MESSAGES\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroApp\ENU\CollectSignatures.aapp regsvr32.exe File created C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\de\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\send-for-sign\images\s_agreement_filetype.svg regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer\js\nls\hu-hu\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL102.XML regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\jre\lib\cmm\PYCC.pf regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\SONORA\SONORA.ELM regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\walk-through\images\checkmark-2x.png regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\FPA_f7\FA000000007 regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft Help\MS.POWERPNT.16.1033.hxn regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\nls\sl-si\readme.txt regsvr32.exe File created C:\Program Files (x86)\Common Files\Microsoft Shared\VSTA\Pipeline.v10.0\Contracts\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\lib\boot.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\fil_get.svg regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\js\nls\sv-se\ui-strings.js regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\signatures\js\nls\zh-cn\ui-strings.js regsvr32.exe -
Drops file in Windows directory 3 IoCs
description ioc Process 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 -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe 2224 regsvr32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 688 ShellExperienceHost.exe 688 ShellExperienceHost.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2400 wrote to memory of 2224 2400 regsvr32.exe 69 PID 2400 wrote to memory of 2224 2400 regsvr32.exe 69 PID 2400 wrote to memory of 2224 2400 regsvr32.exe 69
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\3db6e8df73f12b6a9fa9adb6ad87b017d530a9d736909338042735ed00a9463b.bin.dll1⤵
- Suspicious use of WriteProcessMemory
PID:2400 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\3db6e8df73f12b6a9fa9adb6ad87b017d530a9d736909338042735ed00a9463b.bin.dll2⤵
- Modifies extensions of user files
- Drops startup file
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
PID:2224
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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:688
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k appmodel -s tiledatamodelsvc1⤵
- Drops file in Windows directory
PID:2508