9673fd7dd5945f643996dd58e2ff4a178f536a8f69ad17d29b47319728a8ec67

Analysis

max time kernel
151s
max time network
107s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
26-04-2023 03:50

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General

Target

2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
Size

3.1MB
MD5

d0cceb5de3b6abf673d4939e7383d129
SHA1

12f9befb0b50b188c5c6067b3f0079864ae16c56
SHA256

9673fd7dd5945f643996dd58e2ff4a178f536a8f69ad17d29b47319728a8ec67
SHA512

44b63cc1a990385e54676f428d944fe2cb9b8accde7e887103279f809950cefd975cc561365cec59846905497b15c4cd436cd8cf8de50e019ff296ecdc8cafff
SSDEEP

12288:sp4pNfz3ymJnJ8QCFkxCaQTOlPes5Z76k/L/KB8NIpYJTCihq82WFpXKEVFA2MCz:eEtl9mRda12sX7hKB8NIyXbacAfY

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe HelpMe.exe"	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\I:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\L:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\M:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\N:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\A:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\B:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\F:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\H:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\P:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\Q:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\R:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\U:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\Y:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\E:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\G:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\J:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\K:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\S:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\T:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\W:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\Z:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\O:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\V:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened (read-only)	\??\X:	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe

Drops autorun.inf file 1 TTPs 1 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File opened for modification	C:\AUTORUN.INF	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\HelpMe.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File opened for modification	C:\Windows\SysWOW64\HelpMe.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Windows\SysWOW64\notepad.exe.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\7-Zip\Lang\ky.txt.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\de-DE\InkObj.dll.mui.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\ca.pak.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\jre\bin\javacpl.cpl.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\jre\lib\classlist.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-lib-uihandler_zh_CN.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jre1.8.0_66\bin\sunec.dll.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\IpsMigrationPlugin.dll.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\System\Ole DB\ja-JP\oledb32r.dll.mui.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\System\Ole DB\msdasqlr.dll.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.p2.repository.nl_zh_4.4.0.v20140623020002.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.osgi.nl_zh_4.4.0.v20140623020002.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\profiler\update_tracking\org-netbeans-modules-profiler.xml.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\modules\com-sun-tools-visualvm-application.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\7-Zip\Lang\lv.txt.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.p2.transport.ecf_1.1.0.v20140408-1354.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.util_1.0.500.v20130404-1337.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.ui.forms.nl_ja_4.4.0.v20140623020002.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jre1.8.0_66\bin\jp2ssv.dll.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jre1.8.0_66\lib\content-types.properties.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\config\Modules\org-netbeans-api-search.xml.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ipsesp.xml.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\System\msadc\es-ES\msdaremr.dll.mui.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\CompareSearch.gif.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\core\locale\core_zh_CN.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ipsdeu.xml.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\System\msadc\msdarem.dll.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\config\Modules\com-sun-tools-visualvm-host-views.xml.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Microsoft Office\root\Client\AppVLP.exe.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-math-l1-1-0.dll.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ipsen.xml.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\jre\lib\images\cursors\cursors.properties.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\System\msadc\it-IT\msaddsr.dll.mui.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\cs.pak.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jre1.8.0_66\bin\prism_d3d.dll.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.ecf.core.feature_1.1.0.v20140827-1444\META-INF\ECLIPSE_.RSA.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\com.jrockit.mc.commands_5.5.0.165303.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\com.jrockit.mc.browser.jdp.ja_5.5.0.165303.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\oskpred.xml.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ipssrb.xml.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\microsoft shared\VSTO\10.0\1033\VSTOInstallerUI.dll.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Google\Chrome\Application\106.0.5249.119\notification_helper.exe.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Internet Explorer\SIGNUP\install.ins.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\bin\klist.exe.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\jre\lib\security\trusted.libraries.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\modules\locale\com-sun-tools-visualvm-coredump_ja.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\update_tracking\com-sun-tools-visualvm-profiler.xml.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jre1.8.0_66\lib\deploy\messages_sv.properties.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\org-netbeans-modules-uihandler.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jre1.8.0_66\bin\jp2iexp.dll.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Microsoft Office\root\Client\api-ms-win-core-synch-l1-2-0.dll.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\te.pak.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jre1.8.0_66\bin\server\classes.jsa.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\config\ModuleAutoDeps\org-openide-nodes.xml.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.ui.themes_1.0.1.v20140819-1717\plugin.properties.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Common Files\System\ado\adovbs.inc.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\include\win32\bridge\AccessBridgePackages.h.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\jre\bin\javacpl.exe.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.ecf.filetransfer.httpclient4.ssl.feature_1.0.0.v20140827-1444\feature.properties.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.emf.common_2.10.1.v20140901-1043\META-INF\ECLIPSE_.SF.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.launcher.win32.win32.x86_64.nl_zh_4.4.0.v20140623020002.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.ui.themes_1.0.1.v20140819-1717\css\e4_default_mac.css.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-modules-spi-actions_ja.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-modules-templates_ja.jar.exe	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4876	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
4876	2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe

C:\Users\Admin\AppData\Local\Temp\2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.exe
"C:\Users\Admin\AppData\Local\Temp\2023-04-24_d0cceb5de3b6abf673d4939e7383d129_ryuk.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:4876

Network

MITRE ATT&CK Enterprise v6

Initial Access

Replication Through Removable Media

T1091

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\$Recycle.Bin\S-1-5-21-1675742406-747946869-1029867430-1000\desktop.ini.exe

Filesize
3.1MB

MD5
33e721defb78250a277d71689433d6a8

SHA1
f0b91afedbf197c0cacf232f44c8782c3375d728

SHA256
72a7aa49e32317c792ee75847ac740d5717a781b11bd244f5755c50c1e06a5bd

SHA512
c198eb84f55a9a3d80791bbfc486104b9757868af45d81411385ac771a6e35a1907ec5a7520a537e158e800a017a78a2573406de1370d97f1a4b4115aa5d0dbc

Download Submit
C:\AUTORUN.INF

Filesize
145B

MD5
ca13857b2fd3895a39f09d9dde3cca97

SHA1
8b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0

SHA256
cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae

SHA512
55e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47

Download Submit
C:\Program Files (x86)\Internet Explorer\iexplore.exe.exe

Filesize
3.9MB

MD5
dc6bcbbd7e66222c44c7a9ebed6987b3

SHA1
e66929a5cb342d613224899dde31a4d3540f26c8

SHA256
c422d202483c5a0b2340ae183b905202615a960107985254ab59044247847cba

SHA512
bb43f44e9f8d8d8d9196d67c5e70d892013d89791c398bf7c51501202b1c283cf84d32a6b8d739006eb64d60ea329bddb10f93e6ea2c57c57ad2744156a560a9

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memory/4876-133-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

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memory/4876-140-0x00000000021C0000-0x00000000021C1000-memory.dmp

Filesize
4KB

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memory/4876-368-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

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