Analysis
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max time kernel
122s -
max time network
124s -
platform
windows10_x64 -
resource
win10-en-20211014 -
submitted
11-11-2021 21:01
Static task
static1
Behavioral task
behavioral1
Sample
JAFTEXx86.dll
Resource
win7-en-20211104
Behavioral task
behavioral2
Sample
JAFTEXx86.dll
Resource
win10-en-20211014
General
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Target
JAFTEXx86.dll
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Size
190KB
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MD5
24819ec6a4f57ac3d84538d1b2f422cd
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SHA1
2c1ca712d5c1f0920d13208796975afc01ce6b81
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SHA256
e043dea504d025f18f406d9649b64498338f3330ab9cf30e4efe9c0c2c0231df
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SHA512
b8720879eff6529a80bc86d6f763561e214c2e4bcd5aacd028d316ef6254c1e584c42afd05d9b7139f21a0ad1c3528dc189898ae37735686ad564ba4ae825214
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 3 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
regsvr32.exedescription ioc process File renamed C:\Users\Admin\Pictures\RepairExit.png => C:\Users\Admin\Pictures\RepairExit.png.VADYN regsvr32.exe File opened for modification C:\Users\Admin\Pictures\SaveExit.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\SaveExit.tiff => C:\Users\Admin\Pictures\SaveExit.tiff.VADYN 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\Admin\Downloads\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini regsvr32.exe File opened for modification C:\Users\Public\AccountPictures\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\Public\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\Public\Downloads\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Music\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\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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:\Program Files\Microsoft Office\root\Office16\1033\DataServices\DESKTOP.INI regsvr32.exe File opened for modification C:\Users\Admin\Searches\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 File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Documents\desktop.ini regsvr32.exe File opened for modification C:\Users\Admin\Links\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\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\Contacts\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 -
Drops file in Program Files directory 64 IoCs
Processes:
regsvr32.exedescription ioc process File opened for modification C:\Program Files\Java\jre1.8.0_66\lib\deploy\splash@2x.gif regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\BORDERS\MSART4.BDR regsvr32.exe File created C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\Providers\Plugins2\AdobeHunspellPlugin\Dictionaries\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sign-services-auth\js\nls\pl-pl\readme.txt regsvr32.exe File created C:\Program Files (x86)\MSBuild\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessEntryR_PrepidBypass-ul-oob.xrm-ms regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\images\themeless\inline-error-2x.png regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\orb.idl regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\locale\fur\LC_MESSAGES\vlc.mo regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\RICEPAPR\THMBNAIL.PNG regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-recent-files\js\nls\root\ui-strings.js regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroApp\ENU\Review_RHP.aapp regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\files\dev\nls\ar-ae\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\aicuc\js\nls\nl-nl\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\viewer\nls\sv-se\ui-strings.js regsvr32.exe File opened for modification C:\Program Files\7-Zip\Lang\ast.txt regsvr32.exe File opened for modification C:\Program Files\Mozilla Firefox\browser\features\webcompat@mozilla.org.xpi regsvr32.exe File opened for modification C:\Program Files\VideoLAN\VLC\skins\skin.catalog regsvr32.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\insert\readme.txt regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\lt\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\desktop-connector-files\js\nls\fr-fr\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_Retail2-ul-oob.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_Retail-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN044.XML regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PROOF\LTSHYPH_ES.LEX regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\signatures\js\nls\sl-si\readme.txt 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\he-il\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\Personal2019DemoR_BypassTrial180-ul-oob.xrm-ms regsvr32.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.help_2.0.102.v20141007-2301\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-openide-text_zh_CN.jar regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sign-services-auth\js\nls\de-de\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_Grace-ppd.xrm-ms regsvr32.exe File opened for modification C:\Program Files (x86)\Common Files\System\ado\msado20.tlb regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\Fonts\private\ANTQUAB.TTF 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\images\bun.png regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\aicuc\js\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\generic-rhp-app\js\plugins\rhp\readme.txt regsvr32.exe File opened for modification C:\Program Files\Common Files\microsoft shared\Stationery\Garden.jpg regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\db\lib\derbyLocale_ru.jar regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\WacLangPackEula.txt regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\mn\LC_MESSAGES\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\profiler\config\Modules\org-netbeans-lib-profiler-common.xml regsvr32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\jre\readme.txt regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\ODBC Drivers\redshift.ini regsvr32.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\readme.txt regsvr32.exe File created C:\Program Files\VideoLAN\VLC\locale\hu\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\ru-ru\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jre1.8.0_66\lib\deploy\messages_de.properties regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.contrast-black_scale-80.png regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\AFTRNOON\PREVIEW.GIF regsvr32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\sendforcomments.svg regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Setup Files\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\Java\jdk1.8.0_66\lib\visualvm\visualvm\config\Modules\com-sun-tools-visualvm-heapdump.xml regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\WATER\THMBNAIL.PNG regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\SkypeServiceBypassR_PrepidBypass-ppd.xrm-ms regsvr32.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\profiler\update_tracking\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\search-summary\js\nls\he-il\readme.txt regsvr32.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\readme.txt regsvr32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\combinepdf\js\nls\eu-es\readme.txt regsvr32.exe File opened for modification C:\Program Files\Java\jre1.8.0_66\lib\accessibility.properties regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\PersonalPipcDemoR_BypassTrial365-ul-oob.xrm-ms regsvr32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProjectProDemoR_BypassTrial180-ul-oob.xrm-ms regsvr32.exe -
Drops file in Windows directory 3 IoCs
Processes:
ShellExperienceHost.exesvchost.exedescription ioc process File created C:\Windows\rescache\_merged\4183903823\1195458082.pri ShellExperienceHost.exe File created C:\Windows\rescache\_merged\4032412167\2690874625.pri ShellExperienceHost.exe File opened for modification C:\Windows\Debug\ESE.TXT svchost.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
regsvr32.exepid process 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe 2748 regsvr32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
ShellExperienceHost.exepid process 2088 ShellExperienceHost.exe 2088 ShellExperienceHost.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
regsvr32.exedescription pid process target process PID 2636 wrote to memory of 2748 2636 regsvr32.exe regsvr32.exe PID 2636 wrote to memory of 2748 2636 regsvr32.exe regsvr32.exe PID 2636 wrote to memory of 2748 2636 regsvr32.exe regsvr32.exe
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\JAFTEXx86.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\JAFTEXx86.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\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
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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/2528-116-0x00000273CD8B0000-0x00000273CD8C0000-memory.dmpFilesize
64KB
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memory/2528-117-0x00000273CDCD0000-0x00000273CDCE0000-memory.dmpFilesize
64KB
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memory/2528-118-0x00000273D0350000-0x00000273D0351000-memory.dmpFilesize
4KB
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memory/2748-115-0x0000000000000000-mapping.dmp