Analysis
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max time kernel
146s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20230831-en -
resource tags
arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system -
submitted
02/09/2023, 17:11
Static task
static1
Behavioral task
behavioral1
Sample
2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe
Resource
win10v2004-20230831-en
General
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Target
2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe
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Size
3.4MB
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MD5
53ae3998779825da250ac4e5c81773dc
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SHA1
bcbe29e72f9b57451e33d441966d2d409bfd8ff2
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SHA256
35325555ffe7e72a77b0eb9141e1f257c653aba4ef587d94c5b5c5053b12829f
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SHA512
686b8b135f56fbc4bc43bd4bc92ff1fd3827b25aefce5404e695c0499071aa7767028ec7e5d02f59804ae0a1f09476915a6ff128880e9fea6652883139db69fd
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SSDEEP
98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzM5:9n/
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe HelpMe.exe" 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe -
Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\W: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\X: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\Z: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\L: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\U: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\I: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\O: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\P: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\T: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\V: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\E: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\H: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\J: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\M: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\N: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\Q: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\R: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\S: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\A: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\B: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\Y: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\G: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened (read-only) \??\K: 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe -
Drops autorun.inf file 1 TTPs 2 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
description ioc Process File opened for modification F:\AUTORUN.INF 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened for modification C:\AUTORUN.INF 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe -
Drops file in System32 directory 3 IoCs
description ioc Process File created C:\Windows\SysWOW64\HelpMe.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File opened for modification C:\Windows\SysWOW64\HelpMe.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Windows\SysWOW64\notepad.exe.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe -
Drops file in Program Files directory 64 IoCs
description ioc Process File created C:\Program Files\Microsoft Office\root\Office16\PROOF\msgrammar8.dll.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\EQUATION\api-ms-win-crt-conio-l1-1-0.dll.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\1033\OSFINTL.DLL.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jre1.8.0_66\bin\hprof.dll.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jre1.8.0_66\lib\ext\sunpkcs11.jar.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019VL_KMS_Client_AE-ul.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019XC2RVL_MAKC2R-pl.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Office16\MSOCRRES.ORP.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\TRANSLAT\FREN\MSB1FREN.DLL.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProO365R_SubTest-ppd.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\msth8FR.DLL.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\Fonts\private\BOOKOSB.TTF.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\7-Zip\Lang\an.txt.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\jre\lib\ext\sunpkcs11.jar.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\org-openide-explorer.jar.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\update_tracking\com-sun-tools-visualvm-coredump.xml.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Trial2-ppd.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\SKY\THMBNAIL.PNG.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\SLATE\PREVIEW.GIF.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\MSOHEV.DLL.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\jre\bin\java_crw_demo.dll.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Integration\SPPRedist.msi.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProMSDNR_Retail-ppd.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\WordR_OEM_Perp-ul-oob.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN089.XML.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\GRPHFLT\JPEGIM32.FLT.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\7-Zip\Lang\it.txt.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.ecf.core.ssl.feature_1.0.0.v20140827-1444\META-INF\ECLIPSE_.SF.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\com.jrockit.mc.console.ui.notification_5.5.0.165303\html\dcommon\gifs\bookicon.gif.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\profiler\modules\locale\org-netbeans-modules-profiler-oql_ja.jar.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_Subscription1-pl.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\api-ms-win-crt-utility-l1-1-0.dll.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\msvcp140.dll.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\kn.pak.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.p2.console_1.0.300.v20131113-1212.jar.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\update_tracking\com-sun-tools-visualvm-profiling.xml.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail3-ul-phn.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Analysis Services\AS OLEDB\140\Cartridges\as90.xsl.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\wxpr.dll.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Office16\excel-udf-host.win32.bundle.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2R64.dll.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Common Files\System\msadc\en-US\msadcor.dll.mui.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\jre\lib\ext\jaccess.jar.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\org-netbeans-modules-keyring-fallback.jar.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_Retail2-ppd.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\Fonts\private\BSSYM7.TTF.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\SharedPerformance.man.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Internet Explorer\ExtExport.exe.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\com.jrockit.mc.console.ui.notification.zh_CN_5.5.0.165303.jar.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial1-ppd.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProMSDNR_Retail-ul-oob.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\lib\locale\org-openide-util_ja.jar.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Integration\C2RManifest.OSM.OSM.x-none.msi.16.x-none.xml.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\AccessR_Retail-pl.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProO365R_SubTrial-ul-oob.xrm-ms.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Cartridges\sql2000.xsl.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Common Files\microsoft shared\VSTO\vstoee90.tlb.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\update_tracking\org-netbeans-modules-keyring-impl.xml.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Century Gothic.xml.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN097.XML.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\RADIAL\RADIAL.ELM.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN026.XML.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\NETWORK\NETWORK.ELM.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe File created C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\modules\locale\com-sun-tools-visualvm-coredump_zh_CN.jar.exe 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 5108 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe 5108 2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe"C:\Users\Admin\AppData\Local\Temp\2023-08-22_53ae3998779825da250ac4e5c81773dc_ryuk_JC.exe"1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Enumerates connected drives
- Drops autorun.inf file
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
PID:5108
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.4MB
MD59813117b9e04fc49bca5122799f7fd72
SHA10672041c8288cc7af1fe806e3fd57c8eb7ef8e38
SHA256088735e7c12ecadff68e56bc521f70cb05dabb139e1e30cfac270b26d702f4d0
SHA512cd35a5f548eb9a175f0042414b2ab3a3b405075c4bac1a84f9f6641ce4264c4b4cf9288ffb9bbbc447082b0c54eb180020a9c5a682185d9d23c3dbb23f2e97d6
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Filesize
4.2MB
MD5760d3d9871c512d91a2f299dd88d27be
SHA1e556ab911b6833326726c932138b67cf8533fc2e
SHA256862ec46fd006aed516282a8769ddf6f60d2c4ef98383f6b346c83f9241694dd5
SHA5125294198a4b67525bfffd163495f4e4b9a629adf490a5637aa3ed86ec27e743e1e48c0f7a5c12421b7b8f20caf335fc3408f40484f315bca9361b8f6eddc4cabb
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Filesize
145B
MD5ca13857b2fd3895a39f09d9dde3cca97
SHA18b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0
SHA256cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae
SHA51255e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47