Analysis
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max time kernel
134s -
max time network
119s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
28-09-2021 09:44
Static task
static1
Behavioral task
behavioral1
Sample
dd4867c49f6080ac516b290e9dd1f131598b0222d038afccce5af55c133bf92a.bin.sample.dll
Resource
win7-en-20210920
Behavioral task
behavioral2
Sample
dd4867c49f6080ac516b290e9dd1f131598b0222d038afccce5af55c133bf92a.bin.sample.dll
Resource
win10v20210408
General
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Target
dd4867c49f6080ac516b290e9dd1f131598b0222d038afccce5af55c133bf92a.bin.sample.dll
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Size
190KB
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MD5
baec2ecd3c52fa1a9d0cb8c2bc8a7bea
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SHA1
1018f7e5f354b082427d131dbb1470893aa3d6b8
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SHA256
dd4867c49f6080ac516b290e9dd1f131598b0222d038afccce5af55c133bf92a
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SHA512
8d8acc55969b66390d327e393954a8a66193cda5cd7cc591c9e46ea82d79107ceb160447e5ed6bd3751ab5c09466134f1768c0d0de30c67ab1a143ca790466db
Malware Config
Extracted
C:\readme.txt
conti
http://contirecj4hbzmyzuydyzrvm2c65blmvhoj2cvf25zqj2dwrrqcq5oad.onion/
https://contirecovery.best
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 14 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
regsvr32.exedescription ioc process File opened for modification C:\Users\Admin\Pictures\BlockImport.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\RenameGroup.raw => C:\Users\Admin\Pictures\RenameGroup.raw.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\ResetGroup.png => C:\Users\Admin\Pictures\ResetGroup.png.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\UpdateStart.png => C:\Users\Admin\Pictures\UpdateStart.png.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\UseExport.png => C:\Users\Admin\Pictures\UseExport.png.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\SearchSelect.tif => C:\Users\Admin\Pictures\SearchSelect.tif.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\SetDisconnect.png => C:\Users\Admin\Pictures\SetDisconnect.png.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\BlockImport.tiff => C:\Users\Admin\Pictures\BlockImport.tiff.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\InstallClear.crw => C:\Users\Admin\Pictures\InstallClear.crw.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\MoveSave.crw => C:\Users\Admin\Pictures\MoveSave.crw.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\DebugTrace.tif => C:\Users\Admin\Pictures\DebugTrace.tif.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\GrantMount.tif => C:\Users\Admin\Pictures\GrantMount.tif.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\ImportEnter.raw => C:\Users\Admin\Pictures\ImportEnter.raw.QZMJZ regsvr32.exe File renamed C:\Users\Admin\Pictures\ResetRead.raw => C:\Users\Admin\Pictures\ResetRead.raw.QZMJZ 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\Default\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\Documents\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\AccountPictures\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\Music\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\OneDrive\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\Admin\Downloads\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:\Users\Public\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\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Videos\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\Music\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Pictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Favorites\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:\Program Files\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Links\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\Admin\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\Contacts\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\Camera Roll\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\jre\Welcome.html regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProjectProCO365R_SubTrial-pl.xrm-ms regsvr32.exe File created C:\Program Files\Mozilla Firefox\gmp-clearkey\0.1\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer-select\images\file_icons.png regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\createpdfupsell-app\js\nls\de-de\readme.txt regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\js\ui.js regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\win-scrollbar\themes\dark\hscroll-thumb.png regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\core\locale\core_zh_CN.jar regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\BOLDSTRI\BOLDSTRI.ELM regsvr32.exe File opened for modification C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\Providers\Plugins2\AdobeHunspellPlugin\Dictionaries\en_US\README_en_US.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-files\images\themes\dark\icons_retina.png regsvr32.exe File opened for modification C:\Program Files\7-Zip\Lang\mng.txt regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\dropins\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\s_move_18.svg regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\core\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\home\js\nls\ja-jp\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogo.contrast-black_scale-140.png regsvr32.exe File opened for modification C:\Program Files\Google\Chrome\Application\89.0.4389.114\VisualElements\SmallLogoCanary.png regsvr32.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\EVRGREEN\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\s_filterselected-dark-default_32.svg regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-files\js\nls\de-de\ui-strings.js regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\uss-search\js\nls\zh-cn\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\OFFSYMSL.TTF regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.ecf.core.ssl.feature_1.0.0.v20140827-1444\about.html regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\p2\org.eclipse.equinox.p2.engine\.settings\org.eclipse.equinox.p2.artifact.repository.prefs regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\files\dev\nls\zh-cn\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\viewer\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_OEM_Perp-pl.xrm-ms regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\bg\readme.txt regsvr32.exe File created C:\Program Files\VideoLAN\VLC\plugins\services_discovery\readme.txt 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\VideoLAN\VLC\locale\sr\LC_MESSAGES\vlc.mo regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Cartridges\as80.xsl regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-spi-quicksearch_zh_CN.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\send-for-sign\images\close.svg regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\app-center\js\nls\hr-hr\ui-strings.js regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\pt_BR\LC_MESSAGES\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\file_types\hi_contrast\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\it-it\ui-strings.js regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Setup Files\{AC76BA86-7AD7-1033-7B44-AC0F074E4100}\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\jre\lib\security\trusted.libraries regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\over-arrow-navigation.svg regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-recent-files\js\nls\nb-no\readme.txt regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\css\ui-lightness\images\ui-bg_glass_65_ffffff_1x400.png regsvr32.exe File opened for modification C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\Providers\Plugins2\AdobeHunspellPlugin\SupplementalDictionaries\en_GB\added.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\exportpdfupsell-app\js\nls\ko-kr\readme.txt regsvr32.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\hwrlatinlm.dat regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail2-pl.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019VL_MAK_AE-ul-oob.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Java\jre1.8.0_66\lib\deploy\messages_zh_CN.properties regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\update_tracking\org-netbeans-modules-spi-actions.xml regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_Trial-pl.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_Grace-ppd.xrm-ms regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\locales\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\VisioProO365R_SubTest-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\db\lib\derbyoptionaltools.jar regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\jre\lib\security\java.security regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\walk-through\js\nls\it-it\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\editpdf\js\nls\zh-cn\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_OEM_Perp3-pl.xrm-ms regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\gl\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\profiler\modules\locale\org-netbeans-lib-profiler-ui_zh_CN.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\file_types\themes\dark\acrobat_pdf.svg regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\digsig\images\themes\dark\digsig_icons_2x.png regsvr32.exe -
Drops file in Windows directory 2 IoCs
Processes:
svchost.exesvchost.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 -
Modifies data under HKEY_USERS 1 IoCs
Processes:
svchost.exedescription ioc process Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\OnDemandInterfaceCache svchost.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
regsvr32.exepid process 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe 800 regsvr32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
ShellExperienceHost.exepid process 1876 ShellExperienceHost.exe 1876 ShellExperienceHost.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
regsvr32.exedescription pid process target process PID 664 wrote to memory of 800 664 regsvr32.exe regsvr32.exe PID 664 wrote to memory of 800 664 regsvr32.exe regsvr32.exe PID 664 wrote to memory of 800 664 regsvr32.exe regsvr32.exe
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\dd4867c49f6080ac516b290e9dd1f131598b0222d038afccce5af55c133bf92a.bin.sample.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\dd4867c49f6080ac516b290e9dd1f131598b0222d038afccce5af55c133bf92a.bin.sample.dll2⤵
- 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\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -s BITS1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
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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
Network
MITRE ATT&CK Matrix
Replay Monitor
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Downloads
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memory/800-114-0x0000000000000000-mapping.dmp
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memory/3380-115-0x000001CC2DDC0000-0x000001CC2DDD0000-memory.dmpFilesize
64KB
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memory/3380-116-0x000001CC2DF00000-0x000001CC2DF10000-memory.dmpFilesize
64KB
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memory/3380-118-0x000001CC30D30000-0x000001CC30D31000-memory.dmpFilesize
4KB