Analysis
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max time kernel
121s -
max time network
125s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
17-12-2021 10:32
Static task
static1
Behavioral task
behavioral1
Sample
a05c8129e607c6d0976d79f69c6a020d15767a9ef3a9c9f1570c5193a7b5b76b.dll
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
a05c8129e607c6d0976d79f69c6a020d15767a9ef3a9c9f1570c5193a7b5b76b.dll
Resource
win10-en-20211208
General
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Target
a05c8129e607c6d0976d79f69c6a020d15767a9ef3a9c9f1570c5193a7b5b76b.dll
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Size
190KB
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MD5
ee328adf516df520ebe7dc79bd9d027e
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SHA1
75e3e543001895354dc556b413cb3a4a440bb3ad
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SHA256
a05c8129e607c6d0976d79f69c6a020d15767a9ef3a9c9f1570c5193a7b5b76b
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SHA512
e02b5eb0c5337437a7c0d19bde9ed8f08e4be5c85e529d217c5e9a214809914a1a4b82deee181f57eb0fb7389819273b822298a8e2bd56400b8d15b29210235e
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 1 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
regsvr32.exedescription ioc process File renamed C:\Users\Admin\Pictures\OutReset.crw => C:\Users\Admin\Pictures\OutReset.crw.NKDCT 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\Admin\Documents\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Saved Games\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\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Downloads\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:\Program Files (x86)\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\Music\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\Desktop\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Videos\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Documents\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Links\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Libraries\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\Desktop\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\Contacts\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\Pictures\Saved Pictures\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:\Program Files\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Searches\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\AccountPictures\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 (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\pdf-ownership-rdr-ja_jp_2x.gif 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 opened for modification C:\Program Files\Internet Explorer\SIGNUP\install.ins regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\pt_PT\readme.txt regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\intf\modules\httprequests.luac regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\dd_arrow_small.png regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\s_sendforsignature_18.svg regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\app\dev\nls\ca-es\ui-strings.js regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\reviews\images\themes\dark\cstm_brand_preview.png regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\signatures\js\nls\zh-tw\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp2-ul-oob.xrm-ms regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\hy\LC_MESSAGES\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\next-arrow-disabled.svg regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\selection-actions.png regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\home\images\new_icons.png regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\app-center\js\nls\ro-ro\ui-strings.js regsvr32.exe File created C:\Program Files\Java\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019MSDNR_Retail-ul-phn.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Google\Chrome\Application\89.0.4389.114\Locales\vi.pak regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\S_IlluNoInternetConnection_120x80.svg regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\virgo-new-folder.svg regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\exportpdfupsell-app\images\themes\dark\example_icons2x.png regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\uss-search\js\nls\en-gb\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription1-ul-oob.xrm-ms regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\vi\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\com.jrockit.mc.rjmx_5.5.0.165303\lib\gimap.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\app\dev\nls\ja-jp\ui-strings.js regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\reviews\js\nls\es-es\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\RedoOptimize.xht regsvr32.exe File opened for modification C:\Program Files\Common Files\microsoft shared\Stationery\Peacock.jpg regsvr32.exe File opened for modification C:\Program Files (x86)\Common Files\System\Ole DB\de-DE\sqlxmlx.rll.mui regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.security.ui_1.1.200.v20130626-2037.jar 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\editpdf\js\nls\de-de\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-openide-dialogs_ja.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\file_types\aic_file_icons_retina_thumb_new.png regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\aicuc\js\nls\de-de\readme.txt regsvr32.exe File opened for modification C:\Program Files\Google\Chrome\Application\89.0.4389.114\Locales\bn.pak regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.ui.forms.nl_ja_4.4.0.v20140623020002.jar regsvr32.exe File created C:\Program Files\VideoLAN\VLC\lua\meta\art\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\JOURNAL\JOURNAL.ELM regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Analysis Services\AS OLEDB\140\Cartridges\trdtv2r41.xsl regsvr32.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RHeartbeatConfig.xml regsvr32.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\insert.xml regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Calibri.xml regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\ClientARMRefer_eula.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\img\sample-thumb.png regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\exportpdfupsell-app\js\nls\sk-sk\ui-strings.js regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\task-handler\js\nls\fi-fi\readme.txt 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\js\nls\ru-ru\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\GRPHFLT\PICTIM32.FLT regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\core\dev\nls\zh-tw\readme.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\digsig\images\themes\dark\s_checkbox_unselected_18.svg regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\viewer\nls\root\readme.txt 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\js\nls\en-gb\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\locale\sv\LC_MESSAGES\vlc.mo regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\unified-share\js\nls\fr-ma\ui-strings.js regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\files\dev\nls\sl-si\ui-strings.js regsvr32.exe File created C:\Program Files (x86)\Internet Explorer\es-ES\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jre1.8.0_66\lib\javaws.jar regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\ob-preview\js\nls\sl-si\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\hu-hu\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\include\jni.h regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019R_Retail-ppd.xrm-ms regsvr32.exe -
Drops file in Windows directory 4 IoCs
Processes:
svchost.exeShellExperienceHost.exesvchost.exedescription 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 File opened for modification C:\Windows\Debug\ESE.TXT svchost.exe -
Modifies data under HKEY_USERS 4 IoCs
Processes:
svchost.exedescription ioc process 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 Key created \REGISTRY\USER\S-1-5-19\Software\Classes\Local Settings\MuiCache svchost.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
regsvr32.exepid process 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 regsvr32.exe 3788 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 400 wrote to memory of 3788 400 regsvr32.exe regsvr32.exe PID 400 wrote to memory of 3788 400 regsvr32.exe regsvr32.exe PID 400 wrote to memory of 3788 400 regsvr32.exe regsvr32.exe
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\a05c8129e607c6d0976d79f69c6a020d15767a9ef3a9c9f1570c5193a7b5b76b.dll1⤵
- Suspicious use of WriteProcessMemory
PID:400 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\a05c8129e607c6d0976d79f69c6a020d15767a9ef3a9c9f1570c5193a7b5b76b.dll2⤵
- Modifies extensions of user files
- Drops startup file
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
PID:3788
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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:1520
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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:2236