Analysis
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max time kernel
110s -
max time network
32s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
09-11-2020 20:17
Static task
static1
Behavioral task
behavioral1
Sample
99597a1e872c4bc2ef740522090868854bfef090d1375c4906b1696d4161834e.dll
Resource
win7v20201028
Behavioral task
behavioral2
Sample
99597a1e872c4bc2ef740522090868854bfef090d1375c4906b1696d4161834e.dll
Resource
win10v20201028
General
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Target
99597a1e872c4bc2ef740522090868854bfef090d1375c4906b1696d4161834e.dll
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Size
57KB
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MD5
06777fc51010815284f38dcff3769da1
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SHA1
05a1f84e040a30cfdfe70b855d6da8eefb0a82d7
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SHA256
99597a1e872c4bc2ef740522090868854bfef090d1375c4906b1696d4161834e
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SHA512
5d4b0ea574adc22f2e90509f46166980adb26a3bc7d5e4ba6e1a7982865ebcff331185587bf7772a3a50adcfb529743735da51386c3dec68271b0d6376a217af
Malware Config
Extracted
C:\ProgramData\Microsoft\User Account Pictures\8D94CC-Readme.txt
netwalker
http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion
http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion
Extracted
C:\ProgramData\Microsoft\Windows\Ringtones\8D94CC-Readme.txt
netwalker
http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion
http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion
Extracted
C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\8D94CC-Readme.txt
netwalker
http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion
http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion
Signatures
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Netwalker Ransomware
Ransomware family with multiple versions. Also known as MailTo.
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Modifies extensions of user files 10 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
rundll32.exedescription ioc process File renamed C:\Users\Admin\Pictures\BackupInvoke.tiff => C:\Users\Admin\Pictures\BackupInvoke.tiff.8d94cc rundll32.exe File renamed C:\Users\Admin\Pictures\UninstallReceive.raw => C:\Users\Admin\Pictures\UninstallReceive.raw.8d94cc rundll32.exe File renamed C:\Users\Admin\Pictures\RemoveStop.tiff => C:\Users\Admin\Pictures\RemoveStop.tiff.8d94cc rundll32.exe File renamed C:\Users\Admin\Pictures\AddUnlock.tif => C:\Users\Admin\Pictures\AddUnlock.tif.8d94cc rundll32.exe File renamed C:\Users\Admin\Pictures\WaitFind.tif => C:\Users\Admin\Pictures\WaitFind.tif.8d94cc rundll32.exe File opened for modification C:\Users\Admin\Pictures\RemoveStop.tiff rundll32.exe File renamed C:\Users\Admin\Pictures\PushMount.crw => C:\Users\Admin\Pictures\PushMount.crw.8d94cc rundll32.exe File renamed C:\Users\Admin\Pictures\SetConvertFrom.raw => C:\Users\Admin\Pictures\SetConvertFrom.raw.8d94cc rundll32.exe File renamed C:\Users\Admin\Pictures\CompressStop.tif => C:\Users\Admin\Pictures\CompressStop.tif.8d94cc rundll32.exe File opened for modification C:\Users\Admin\Pictures\BackupInvoke.tiff rundll32.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops file in Program Files directory 7472 IoCs
Processes:
rundll32.exedescription ioc process File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\update_tracking\org-netbeans-spi-quicksearch.xml rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\BULLETS\BD21297_.GIF rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\profiler\update_tracking\org-netbeans-modules-profiler-selector-ui.xml rundll32.exe File opened for modification C:\Program Files\7-Zip\Lang\fi.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\PUBSPAPR\PDIR46B.GIF rundll32.exe File created C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\Annotations\Stamps\ENU\8D94CC-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\LINES\BD21427_.GIF rundll32.exe File created C:\Program Files (x86)\Microsoft Office\Office14\1033\PUBSPAPR\8D94CC-Readme.txt rundll32.exe File opened for modification C:\Program Files\Java\jre7\lib\zi\America\Argentina\Cordoba rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\locale\org-netbeans-modules-keyring_ja.jar rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0195788.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\mset7db.kic rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms5\FormsFormTemplate.html rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\Modules\org-netbeans-modules-progress-ui.xml rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.rcp.intro.zh_CN_5.5.0.165303.jar rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0198016.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\ACTIVITY.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Fonts\Grid.xml rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\BL00105_.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\Certificates\Verisign\Components\VeriSign_Class_3_Code_Signing_2001-4_CA.cer rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\css\ui-lightness\images\ui-icons_228ef1_256x240.png rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\BULLETS\BD14866_.GIF rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.ecf.provider.filetransfer.httpclient4.ssl_1.0.0.v20140827-1444.jar rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0153299.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Resource\Linguistics\Providers\Proximity\11.00\can129.hsp rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\profiler\modules\org-netbeans-modules-profiler-snaptracer.jar rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\Modules\org-netbeans-modules-sampler.xml rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\FormsStyles\Earthy.css rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\org-openide-awt.jar rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.200.v20141007-2033\launcher.win32.win32.x86_64.properties rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Effects\Median.eftx rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\include\jni.h rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\locale\lv\LC_MESSAGES\vlc.mo rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\config\Modules\com-sun-tools-visualvm-heapdump.xml rundll32.exe File opened for modification C:\Program Files\Java\jre7\lib\zi\Asia\Irkutsk rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\co\LC_MESSAGES\8D94CC-Readme.txt rundll32.exe File created C:\Program Files\VideoLAN\VLC\lua\http\8D94CC-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms5\rtf_hyperlink.gif rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\POSTCARD.XML rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\playlist\cue.luac rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\update_tracking\org-netbeans-core.xml rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Cambridge_Bay rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms3\PublicFunctions.js rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\PUBSPAPR\ZPDIR6F.GIF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0152722.WMF rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\ga\LC_MESSAGES\8D94CC-Readme.txt rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\ja\LC_MESSAGES\8D94CC-Readme.txt rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.core.databinding.beans.nl_ja_4.4.0.v20140623020002.jar rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\FD00414_.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107748.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\NA02126_.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins3d\tesselate.x3d rundll32.exe File created C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\com.jrockit.mc.feature.flightrecorder_5.5.0.165303\8D94CC-Readme.txt rundll32.exe File opened for modification C:\Program Files\Java\jre7\lib\zi\Europe\Andorra rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\FLYER98.POC rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\mk\LC_MESSAGES\8D94CC-Readme.txt rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\uk\LC_MESSAGES\8D94CC-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\BULLETS\BD14833_.GIF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\BULLETS\BD21310_.GIF rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\THIRDPARTYLICENSEREADME.txt rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\locale\kn\LC_MESSAGES\vlc.mo rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\bg_SlateBlue.gif rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\TR00232_.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\CAGCAT10\J0212219.WMF rundll32.exe -
Suspicious behavior: EnumeratesProcesses 224 IoCs
Processes:
rundll32.exepid process 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe 1544 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
rundll32.exedescription pid process Token: SeDebugPrivilege 1544 rundll32.exe Token: SeImpersonatePrivilege 1544 rundll32.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 2036 wrote to memory of 1544 2036 rundll32.exe rundll32.exe PID 2036 wrote to memory of 1544 2036 rundll32.exe rundll32.exe PID 2036 wrote to memory of 1544 2036 rundll32.exe rundll32.exe PID 2036 wrote to memory of 1544 2036 rundll32.exe rundll32.exe PID 2036 wrote to memory of 1544 2036 rundll32.exe rundll32.exe PID 2036 wrote to memory of 1544 2036 rundll32.exe rundll32.exe PID 2036 wrote to memory of 1544 2036 rundll32.exe rundll32.exe PID 1544 wrote to memory of 5056 1544 rundll32.exe notepad.exe PID 1544 wrote to memory of 5056 1544 rundll32.exe notepad.exe PID 1544 wrote to memory of 5056 1544 rundll32.exe notepad.exe PID 1544 wrote to memory of 5056 1544 rundll32.exe notepad.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\99597a1e872c4bc2ef740522090868854bfef090d1375c4906b1696d4161834e.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\99597a1e872c4bc2ef740522090868854bfef090d1375c4906b1696d4161834e.dll,#12⤵
- Modifies extensions of user files
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\notepad.exeC:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\8D94CC-Readme.txt"3⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\Desktop\8D94CC-Readme.txtMD5
38e4a1966e7f44f407baeac26c8767ef
SHA1a6185efbb95a02d893607c105e726b81cacadf35
SHA256b21cd76d577a5107bfe75a93d3820bdc6cbc2df620f2b400c2970e1465fb6e1a
SHA512f222eff6c2bd53bf5a7deb0861fc23df656c53d189bfe8572af5e7ef8f46beaf071906b65eb9672d00cce47268e6484a4018f1934a850a725ef79a4bb2176cef
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memory/1544-0-0x0000000000000000-mapping.dmp
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memory/5056-1-0x0000000000000000-mapping.dmp