Analysis
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max time kernel
146s -
max time network
130s -
platform
windows7_x64 -
resource
win7-en-20210920 -
submitted
04-10-2021 16:51
Static task
static1
Behavioral task
behavioral1
Sample
ATOMSILO_2.exe
Resource
win7-en-20210920
Behavioral task
behavioral2
Sample
ATOMSILO_2.exe
Resource
win10v20210408
General
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Target
ATOMSILO_2.exe
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Size
328KB
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MD5
04a8307259478245cbae49940b6d655a
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SHA1
0f5259812be378bbd764cef94697019075990b4d
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SHA256
d9f7bb98ad01c4775ec71ec66f5546de131735e6dba8122474cc6eb62320e47b
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SHA512
a2277ba16e1749ea7528f38640b2e2ca6d3aeb3c86df0bc417df37416fa6bc9be3bc84889e73793f8cda965676c2b0976bab140be2246dce7ab4ea6451d2e0f3
Malware Config
Extracted
C:\Users\Public\ATOMSILO-README.hta
atomsilo
Email:[email protected]
http://mhdehvkomeabau7gsetnsrhkfign4jgnx3wajth5yb5h6kvzbd72wlqd.onion
Signatures
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AtomSilo
Ransomware family first seen in September 2021.
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Modifies extensions of user files 7 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
ATOMSILO_2.exedescription ioc process File renamed C:\Users\Admin\Pictures\ProtectConfirm.png => \??\c:\Users\Admin\Pictures\ProtectConfirm.png.ATOMSILO ATOMSILO_2.exe File renamed C:\Users\Admin\Pictures\RegisterUninstall.png => \??\c:\Users\Admin\Pictures\RegisterUninstall.png.ATOMSILO ATOMSILO_2.exe File opened for modification \??\c:\Users\Admin\Pictures\RenameRestart.tiff ATOMSILO_2.exe File renamed C:\Users\Admin\Pictures\RenameRestart.tiff => \??\c:\Users\Admin\Pictures\RenameRestart.tiff.ATOMSILO ATOMSILO_2.exe File renamed C:\Users\Admin\Pictures\RenameStep.png => \??\c:\Users\Admin\Pictures\RenameStep.png.ATOMSILO ATOMSILO_2.exe File renamed C:\Users\Admin\Pictures\StopInvoke.png => \??\c:\Users\Admin\Pictures\StopInvoke.png.ATOMSILO ATOMSILO_2.exe File renamed C:\Users\Admin\Pictures\CompleteResolve.crw => \??\c:\Users\Admin\Pictures\CompleteResolve.crw.ATOMSILO ATOMSILO_2.exe -
Deletes itself 1 IoCs
Processes:
cmd.exepid process 748 cmd.exe -
Drops file in Program Files directory 64 IoCs
Processes:
ATOMSILO_2.exedescription ioc process File created \??\c:\Program Files\Common Files\Microsoft Shared\ink\ja-JP\README-FILE-JZCKHXIN-1633366318.hta ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\update_tracking\org-netbeans-modules-templates.xml ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Windows Sidebar\Gadgets\Clock.Gadget\images\settings_divider.png ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Colors\Trek.xml ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\AddToViewArrowMask.bmp ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Windows Sidebar\Gadgets\Clock.Gadget\de-DE\css\clock.css ATOMSILO_2.exe File created \??\c:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\ja-JP\js\README-FILE-JZCKHXIN-1633366318.hta ATOMSILO_2.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\winXPBluTSFrame.png ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\Checkers.api ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Adobe\Reader 9.0\Resource\Font\MinionPro-It.otf ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\LINES\BD21328_.GIF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolBMPs\QuestionIcon.jpg ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\images\docked_black_snow.png ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\images\undocked_gray_few-showers.png ATOMSILO_2.exe File opened for modification \??\c:\Program Files\DVD Maker\Shared\DvdStyles\Pets\Title_Page_Ref_PAL.wmv ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jre7\lib\zi\America\Kentucky\Monticello ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PH01247U.BMP ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Office14\1033\PUBSPAPR\ZPDIR36F.GIF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\CommonData\CommsOutgoingImage.jpg ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jre7\lib\zi\Pacific\Noumea ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Windows Sidebar\Gadgets\RSSFeeds.Gadget\en-US\js\settings.js ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107446.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Common Files\microsoft shared\THEMES14\SUMIPNTG\SUMIPNTG.INF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms3\button_right_over.gif ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Windows Sidebar\Gadgets\CPU.Gadget\icon.png ATOMSILO_2.exe File opened for modification \??\c:\Program Files\DVD Maker\Shared\DvdStyles\LayeredTitles\203x8subpicture.png ATOMSILO_2.exe File opened for modification \??\c:\Program Files\VideoLAN\VLC\locale\an\LC_MESSAGES\vlc.mo ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Windows Sidebar\Gadgets\Currency.Gadget\ja-JP\js\localizedStrings.js ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0105414.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Templates\1033\Access\Part\Issues.accdt ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jre7\lib\zi\Etc\GMT-14 ATOMSILO_2.exe File opened for modification \??\c:\Program Files\VideoLAN\VLC\lua\http\requests\status.json ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Windows Sidebar\Gadgets\Currency.Gadget\images\combo-hover-left.png ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\TN00211_.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files\7-Zip\7zCon.sfx ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Common Files\Microsoft Shared\Stationery\Orange Circles.htm ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0301052.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\NA01357_.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PE00720_.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveProjectToolset\ProjectTool\Project Report Type\Fancy\SPACER.GIF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Office14\MEDIA\BREEZE.WAV ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jdk1.7.0_80\jre\lib\fonts\LucidaBrightItalic.ttf ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\New_York ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.rjmx_5.5.0.165303\schema\com.jrockit.mc.rjmx.syntheticnotification.exsd ATOMSILO_2.exe File created \??\c:\Program Files\Windows Defender\en-US\README-FILE-JZCKHXIN-1633366318.hta ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\AUTOSHAP\BD18242_.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\NA00538_.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PH03012U.BMP ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Office14\PAGESIZE\PGLBL097.XML ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0153313.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO02793_.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Atlantic\Madeira ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\p2\org.eclipse.equinox.p2.engine\profileRegistry\JMC.profile\1423861240811.profile.gz ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.jface.nl_zh_4.4.0.v20140623020002.jar ATOMSILO_2.exe File created \??\c:\Program Files\VideoLAN\VLC\locale\el\LC_MESSAGES\README-FILE-JZCKHXIN-1633366318.hta ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms\menu_arrow.gif ATOMSILO_2.exe File created \??\c:\Program Files (x86)\Common Files\microsoft shared\OFFICE14\Office Setup Controller\Groove.en-us\README-FILE-JZCKHXIN-1633366318.hta ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0239951.WMF ATOMSILO_2.exe File opened for modification \??\c:\Program Files (x86)\Microsoft Office\Office14\Library\Analysis\FUNCRES.XLAM ATOMSILO_2.exe File created \??\c:\Program Files\7-Zip\Lang\README-FILE-JZCKHXIN-1633366318.hta ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Java\jre7\lib\zi\Australia\Adelaide ATOMSILO_2.exe File created \??\c:\Program Files\Windows Photo Viewer\fr-FR\README-FILE-JZCKHXIN-1633366318.hta ATOMSILO_2.exe File opened for modification \??\c:\Program Files\Windows Sidebar\Gadgets\Weather.Gadget\images\btn_close_down.png ATOMSILO_2.exe File opened for modification \??\c:\Program Files\7-Zip\Lang\en.ttt ATOMSILO_2.exe -
Processes:
mshta.exemshta.exemshta.exemshta.exemshta.exemshta.exemshta.exemshta.exemshta.exemshta.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Internet Explorer\Main mshta.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Internet Explorer\Main mshta.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Internet Explorer\Main mshta.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Internet Explorer\Main mshta.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Internet Explorer\Main mshta.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Internet Explorer\Main mshta.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Internet Explorer\Main mshta.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Internet Explorer\Main mshta.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Internet Explorer\Main mshta.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Internet Explorer\Main mshta.exe -
Runs ping.exe 1 TTPs 1 IoCs
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Suspicious use of WriteProcessMemory 36 IoCs
Processes:
ATOMSILO_2.execmd.exedescription pid process target process PID 2004 wrote to memory of 552 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 552 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 552 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 812 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 812 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 812 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 684 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 684 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 684 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 588 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 588 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 588 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 1652 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 1652 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 1652 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 1436 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 1436 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 1436 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 1076 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 1076 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 1076 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 616 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 616 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 616 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 540 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 540 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 540 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 752 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 752 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 752 2004 ATOMSILO_2.exe mshta.exe PID 2004 wrote to memory of 748 2004 ATOMSILO_2.exe cmd.exe PID 2004 wrote to memory of 748 2004 ATOMSILO_2.exe cmd.exe PID 2004 wrote to memory of 748 2004 ATOMSILO_2.exe cmd.exe PID 748 wrote to memory of 844 748 cmd.exe PING.EXE PID 748 wrote to memory of 844 748 cmd.exe PING.EXE PID 748 wrote to memory of 844 748 cmd.exe PING.EXE
Processes
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C:\Users\Admin\AppData\Local\Temp\ATOMSILO_2.exe"C:\Users\Admin\AppData\Local\Temp\ATOMSILO_2.exe"1⤵
- Modifies extensions of user files
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2004 -
C:\Windows\system32\mshta.exemshta "C:\Users\Public\ATOMSILO-README.hta"2⤵
- Modifies Internet Explorer settings
PID:552
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C:\Windows\system32\mshta.exemshta "C:\Users\Public\ATOMSILO-README.hta"2⤵
- Modifies Internet Explorer settings
PID:812
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C:\Windows\system32\mshta.exemshta "C:\Users\Public\ATOMSILO-README.hta"2⤵
- Modifies Internet Explorer settings
PID:684
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C:\Windows\system32\mshta.exemshta "C:\Users\Public\ATOMSILO-README.hta"2⤵
- Modifies Internet Explorer settings
PID:588
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C:\Windows\system32\mshta.exemshta "C:\Users\Public\ATOMSILO-README.hta"2⤵
- Modifies Internet Explorer settings
PID:1652
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C:\Windows\system32\mshta.exemshta "C:\Users\Public\ATOMSILO-README.hta"2⤵
- Modifies Internet Explorer settings
PID:1436
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C:\Windows\system32\mshta.exemshta "C:\Users\Public\ATOMSILO-README.hta"2⤵
- Modifies Internet Explorer settings
PID:1076
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C:\Windows\system32\mshta.exemshta "C:\Users\Public\ATOMSILO-README.hta"2⤵
- Modifies Internet Explorer settings
PID:616
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C:\Windows\system32\mshta.exemshta "C:\Users\Public\ATOMSILO-README.hta"2⤵
- Modifies Internet Explorer settings
PID:540
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C:\Windows\system32\mshta.exemshta "C:\Users\Public\ATOMSILO-README.hta"2⤵
- Modifies Internet Explorer settings
PID:752
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C:\Windows\system32\cmd.execmd /c ping 127.0.0.1 -n 6 && del "C:\Users\Admin\AppData\Local\Temp\ATOMSILO_2.exe"2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:748 -
C:\Windows\system32\PING.EXEping 127.0.0.1 -n 63⤵
- Runs ping.exe
PID:844
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Network
MITRE ATT&CK Enterprise v6
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Downloads
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MD5
491ea317fb6c8b6480e466c7f9609882
SHA1174a6b3a5746f0e9c4147c84f9f4886a81c00596
SHA25662895cbddaa94033f325b454d177aa0d1db3c0e33d6042fcf26bde1f7886f4f6
SHA5126a7146b513e3872d273f2fcc3114c6f1951b1fd0472735614ad1e77b5fdbebebb89d5127f1db9c5cdbb7340092f33a11bd8a1d67fe31ce22c835194667cfe4f1