Analysis
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max time kernel
145s -
max time network
163s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
19-05-2021 13:45
Static task
static1
Behavioral task
behavioral1
Sample
sample.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
sample.exe
Resource
win10v20210408
General
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Target
sample.exe
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Size
179KB
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MD5
61fccc142e2bbf498885bb6e42bae62c
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SHA1
7f15507c7798d8b99696c19929c86c6c629eb2f5
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SHA256
ae91da58a702252cc0dabcf19fa65e9655c7b7143e71e048aad1ebe59a31aabf
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SHA512
a3cc95a442581d02c97d4fe48494b157f37e5dff4ddf175723a2c99e442492370ad65f9f22da29ffd020754445193215b7dadc3515ab8cee91b6dd3b1f1202b1
Malware Config
Signatures
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Modifies extensions of user files 5 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
sample.exedescription ioc process File renamed C:\Users\Admin\Pictures\LimitUnregister.png => C:\Users\Admin\Pictures\LimitUnregister.png.matryoshka sample.exe File renamed C:\Users\Admin\Pictures\PingGet.tif => C:\Users\Admin\Pictures\PingGet.tif.matryoshka sample.exe File renamed C:\Users\Admin\Pictures\StartSend.png => C:\Users\Admin\Pictures\StartSend.png.matryoshka sample.exe File opened for modification C:\Users\Admin\Pictures\TraceMove.tiff sample.exe File renamed C:\Users\Admin\Pictures\TraceMove.tiff => C:\Users\Admin\Pictures\TraceMove.tiff.matryoshka sample.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 64 IoCs
Processes:
sample.exedescription ioc process File created C:\Program Files\Common Files\Microsoft Shared\ink\fsdefinitions\keypad\ea.xml sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\MediaCenter.Gadget\images\Gadget_Main_Background_Loading.png sample.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms\button_right.gif sample.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\Visualizer.zip sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Clock.Gadget\images\diner_dot.png sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\images\divider-horizontal.png sample.exe File created C:\Program Files\Common Files\Microsoft Shared\ink\fsdefinitions\main\zh-phonetic.xml sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\circle_glass_Thumbnail.bmp sample.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\js\controllers.js sample.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms3\ViewHeaderPreview.jpg sample.exe File created C:\Program Files (x86)\Adobe\Reader 9.0\Reader\IDTemplates\ENU\DefaultID.pdf sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\RSSFeeds.Gadget\en-US\settings.html sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\ResizingPanels\1047x576black.png sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\Sports\highlight.png sample.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\update_tracking\org-openide-filesystems.xml sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\MediaCenter.Gadget\images\ehshellLogo.png sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\Stacking\NavigationRight_SelectionSubpicture.png sample.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\about.html sample.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.ui.themes_1.0.1.v20140819-1717\images\macTSFrame.png sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\PicturePuzzle.Gadget\Images\2.png sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\CPU.Gadget\images\dial_lrg.png sample.exe File created C:\Program Files (x86)\Adobe\Reader 9.0\Resource\TypeSupport\Unicode\Mappings\Adobe\symbol.txt sample.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Colors\Newsprint.xml sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\images\btn_close_down_BIDI.png sample.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\CommonData\AlertImage_Auto.jpg sample.exe File created C:\Program Files (x86)\Windows Media Player\Media Renderer\avtransport.xml sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Calendar.Gadget\en-US\calendar.html sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\Weather.Gadget\images\docked_black_thunderstorm.png sample.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Colors\Apothecary.xml sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Clock.Gadget\images\settings_corner_bottom_left.png sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\images\34.png sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\Performance\TitleButtonIcon.png sample.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\config\Modules\com-sun-tools-visualvm-profiling.xml sample.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\requests\browse.json sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\SlideShow.Gadget\images\play_down.png sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\Memories\btn-previous-static.png sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\ResizingPanels\NavigationUp_SelectionSubpicture.png sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\Calendar.Gadget\images\calendar_ring_docked.png sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\Weather.Gadget\images\39.png sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Currency.Gadget\drag.png sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Currency.Gadget\images\delete_up.png sample.exe File created C:\Program Files\Common Files\Microsoft Shared\Stationery\GreenBubbles.jpg sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\Vignette\vignettemask25.png sample.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\Modules\org-netbeans-api-progress.xml sample.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\Modules\org-openide-nodes.xml sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\SlideShow.Gadget\en-US\js\slideShow.js sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\Clock.Gadget\images\square_h.png sample.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\CommonData\UnreadIconImages.jpg sample.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms3\FormsPrintTemplate.html sample.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Currency.Gadget\en-US\js\service.js sample.exe File created C:\Program Files\Common Files\Microsoft Shared\ink\en-US\boxed-correct.avi sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\Pets\Pets_image-frame-backglow.png sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\Shatter\NavigationUp_SelectionSubpicture.png sample.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.ecf.core.ssl.feature_1.0.0.v20140827-1444\epl-v10.html sample.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.help_2.0.102.v20141007-2301\epl-v10.html sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\Calendar.Gadget\images\bPrev-down.png sample.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\config\Modules\com-sun-tools-visualvm-attach.xml sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\Weather.Gadget\images\32.png sample.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\InfoPathOM\InfoPathOMV12\Microsoft.Office.InfoPath.xml sample.exe File created C:\Program Files\DVD Maker\Shared\DvdStyles\menu_style_default_Thumbnail.png sample.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.ui.themes_1.0.1.v20140819-1717\images\gtkTSFrame.png sample.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\Modules\org-netbeans-api-visual.xml sample.exe File created C:\Program Files\Windows Sidebar\Gadgets\Clock.Gadget\en-US\js\settings.js sample.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms3\button_mid_over.gif sample.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Processes:
sample.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Main sample.exe -
Modifies registry class 1 IoCs
Processes:
rundll32.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_Classes\Local Settings rundll32.exe -
Opens file in notepad (likely ransom note) 1 IoCs
Processes:
NOTEPAD.EXEpid process 1600 NOTEPAD.EXE -
Suspicious use of AdjustPrivilegeToken 7 IoCs
Processes:
vssvc.exeAUDIODG.EXEdescription pid process Token: SeBackupPrivilege 1716 vssvc.exe Token: SeRestorePrivilege 1716 vssvc.exe Token: SeAuditPrivilege 1716 vssvc.exe Token: 33 1672 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 1672 AUDIODG.EXE Token: 33 1672 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 1672 AUDIODG.EXE -
Suspicious use of SetWindowsHookEx 6 IoCs
Processes:
sample.exepid process 1660 sample.exe 1660 sample.exe 1660 sample.exe 1660 sample.exe 1660 sample.exe 1660 sample.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
rundll32.exedescription pid process target process PID 1280 wrote to memory of 1600 1280 rundll32.exe NOTEPAD.EXE PID 1280 wrote to memory of 1600 1280 rundll32.exe NOTEPAD.EXE PID 1280 wrote to memory of 1600 1280 rundll32.exe NOTEPAD.EXE
Processes
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C:\Users\Admin\AppData\Local\Temp\sample.exe"C:\Users\Admin\AppData\Local\Temp\sample.exe"1⤵
- Modifies extensions of user files
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1660
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1716
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0xc81⤵
- Suspicious use of AdjustPrivilegeToken
PID:1672
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\SuspendWatch.pps.matryoshka1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1280 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\SuspendWatch.pps.matryoshka2⤵
- Opens file in notepad (likely ransom note)
PID:1600
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Network
MITRE ATT&CK Enterprise v6
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Downloads
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MD5
4e6561070bf2bec2037507f419a8718f
SHA199d8d6ef2e8a4badf39101f6434f633a9290d52a
SHA2568ccefd60ad2e7588d9472156786dee2adcd5550cd72af2fec37ed14a0b9b3082
SHA512702dd72420fdebf95be21f67cc93650ae121594ba399d3ad79100226d39e10606e639e76c6c0dfed2f8db44841e0d0960b8f6b56cb9ec41d92df0f6af4455993