ryuk | db670caff58f0802a99720ba76d29940eb62174bb3a884cd9a14432666eab7bf

Analysis

max time kernel
150s
max time network
126s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
25-11-2023 03:09

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Report Analysis Logs

General

Target

ryuk.exe
Size

384KB
MD5

5ac0f050f93f86e69026faea1fbb4450
SHA1

9709774fde9ec740ad6fed8ed79903296ca9d571
SHA256

23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2
SHA512

b554487c4e26a85ec5179cdcc1d25b5bc494e8821a8899fbbf868c3cf41f70cc72db107613b3f6655d3ab70f4db94cce2589066bb354b1ed955098d3911b844d
SSDEEP

6144:f5yaXtrA/WSo1rl3ALrlHQpn0BwK3SBDmhYfFQC:fTX6WSofcZ+KCIGD

Score

10^/10

ryuk persistence ransomware

Malware Config

Extracted

Path

C:\RyukReadMe.txt

Family

ryuk

Ransom Note

Your network has been penetrated. All files on each host in the network have been encrypted with a strong algorithm. Backups were either encrypted or deleted or backup disks were formatted. Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover. We exclusively have decryption software for your situation No decryption software is available in the public. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT RENAME OR MOVE the encrypted and readme files. DO NOT DELETE readme files. This may lead to the impossibility of recovery of the certain files. To get info (decrypt your files) contact us at [email protected] or [email protected] BTC wallet: 14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk Ryuk No system is safe

Emails

[email protected]

Wallets

14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk

Signatures

Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
ransomware ryuk

Deletes itself 1 IoCs

pid	Process
2772	FaiDx.exe

Executes dropped EXE 1 IoCs

pid	Process
2772	FaiDx.exe

Loads dropped DLL 1 IoCs

pid	Process
2988	ryuk.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3618187007-3650799920-3290345941-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\users\\Public\\FaiDx.exe"	reg.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\rectangle_photo_Thumbnail.bmp	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\TravelIntroToMainMask.wmv	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\ModuleAutoDeps\org-openide-loaders.xml	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\Lang\si.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\BabyBoy\BabyBoyNotesBackground_PAL.wmv	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.flightrecorder.ui_5.5.0.165303.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.equinox.launcher.nl_zh_4.4.0.v20140623020002.jar	taskhost.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\triggerEvaluators.exsd	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\deploy\ffjcext.zip	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Asia\Kuching	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Asia\Oral	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\SystemV\AST4	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.ecf.filetransfer.httpclient4.ssl.feature_1.0.0.v20140827-1444\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\Modules\org-netbeans-lib-uihandler.xml	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\Lang\az.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\content-background.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Monterrey	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Etc\GMT+4	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\com.jrockit.mc.rcp.product_5.5.0.165303\feature.properties	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\Shades of Blue.htm	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\Ole DB\es-ES\sqloledb.rll.mui	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\BabyBoy\nav_leftarrow.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Stacking\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.help.webapp.nl_zh_4.4.0.v20140623020002.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Europe\Vienna	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.ecf.core.feature_1.1.0.v20140827-1444\epl-v10.html	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.emf.ecore_2.10.1.v20140901-1043\META-INF\ECLIPSE_.SF	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.equinox.p2.rcp.feature_1.2.0.v20140523-0116\feature.xml	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\btn-back-static.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.equinox.p2.ui.sdk.scheduler_1.2.0.v20140422-1847.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Guyana	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.ecf.filetransfer.ssl.feature_1.0.0.v20140827-1444\epl-v10.html	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\DvdTransform.fx	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\deploy\messages_ja.properties	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\ext\dnsns.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Belem	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\include\win32\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.console.ui.notification_5.5.0.165303\html\dcommon\gifs\contbig.gif	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.jface.text.nl_zh_4.4.0.v20140623020002.jar	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Pacific\Bougainville	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\javax.annotation_1.2.0.v201401042248.jar	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\BabyGirl\curtains.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.apache.jasper.glassfish_2.2.2.v201205150955.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.help_3.6.0.v20130326-1254.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\North_Dakota\Beulah	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Asia\Riyadh89	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\com.jrockit.mc.feature.rcp_5.5.0.165303\feature.properties	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\History.txt	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\Lang\ast.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\rectangle_babypink_Thumbnail.bmp	taskhost.exe
File opened for modification	C:\Program Files\ExpandSwitch.jpeg	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\WhiteDot.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Africa\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.help.webapp_3.6.300.v20140407-1855.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\db\lib\derbyLocale_pt_BR.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.console.ui.notification_5.5.0.165303\META-INF\MANIFEST.MF	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.e4.ui.css.swt.nl_zh_4.4.0.v20140623020002.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.equinox.p2.artifact.repository.nl_ja_4.4.0.v20140623020002.jar	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\Content.xml	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Shatter\NavigationRight_ButtonGraphic.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Europe\Kiev	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Europe\Tallinn	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\Modules\org-netbeans-api-search.xml	taskhost.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2772	FaiDx.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2772	FaiDx.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 2772	2988	ryuk.exe	28
PID 2988 wrote to memory of 2772	2988	ryuk.exe	28
PID 2988 wrote to memory of 2772	2988	ryuk.exe	28
PID 2988 wrote to memory of 2772	2988	ryuk.exe	28
PID 2772 wrote to memory of 2640	2772	FaiDx.exe	29
PID 2772 wrote to memory of 2640	2772	FaiDx.exe	29
PID 2772 wrote to memory of 2640	2772	FaiDx.exe	29
PID 2772 wrote to memory of 1116	2772	FaiDx.exe	16
PID 2640 wrote to memory of 2636	2640	cmd.exe	31
PID 2640 wrote to memory of 2636	2640	cmd.exe	31
PID 2640 wrote to memory of 2636	2640	cmd.exe	31
PID 2772 wrote to memory of 1184	2772	FaiDx.exe	15

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1184

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
- Drops file in Program Files directory
PID:1116

C:\Users\Admin\AppData\Local\Temp\ryuk.exe
"C:\Users\Admin\AppData\Local\Temp\ryuk.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2988
- C:\users\Public\FaiDx.exe
  "C:\users\Public\FaiDx.exe" C:\Users\Admin\AppData\Local\Temp\ryuk.exe
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2772
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\users\Public\FaiDx.exe" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2640
  - - C:\Windows\system32\reg.exe
      REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\users\Public\FaiDx.exe" /f
      4⤵
      Adds Run key to start application
      PID:2636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\RyukReadMe.txt

Filesize
804B

MD5
cd99cba6153cbc0b14b7a849e4d0180f

SHA1
375961866404a705916cbc6cd4915de7d9778923

SHA256
74c43a177917b1d57ea2eaf6212ccf3b9012b4d68bc45284349443eed0bf5ee2

SHA512
0c9f250c0e2ec9736b072a9807b6c3bec4b670ab2f511e65cf5d79e9a8c9a209eb91736ce2765b52b6d94a57c6aa1c16bb08e16727660699b70608439c8b7cda

Download Submit
C:\Users\Public\FaiDx.exe

Filesize
170KB

MD5
31bd0f224e7e74eee2847f43aae23974

SHA1
92e331e1e8ad30538f38dd7ba31386afafa14a58

SHA256
8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d

SHA512
a13f05a12b084ef425f542ff4be824bbccb5dbdfe085af8b7e19d81a6bcba4b8c1debcc38f6b57bc9265a4db21eed70852ece8cc62b3ef14c47fca3035a55249

Download Submit
\Users\Public\FaiDx.exe

Filesize
170KB

MD5
31bd0f224e7e74eee2847f43aae23974

SHA1
92e331e1e8ad30538f38dd7ba31386afafa14a58

SHA256
8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d

SHA512
a13f05a12b084ef425f542ff4be824bbccb5dbdfe085af8b7e19d81a6bcba4b8c1debcc38f6b57bc9265a4db21eed70852ece8cc62b3ef14c47fca3035a55249

Download Submit
memory/1116-58-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-29-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-7-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-65-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-23-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-69-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-26-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-66-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-31-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-33-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-35-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-40-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-41-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-43-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-47-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-49-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-51-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-53-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-62-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-5-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-22-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-8-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-24-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-68-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-71-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-76-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-78-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-81-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-83-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-90-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-95-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-94-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-97-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-105-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-102-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-108-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-111-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-113-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-118-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1116-1163-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download
memory/1184-1355-0x000000013FA00000-0x000000013FD8E000-memory.dmp

Filesize
3.6MB

Download