ryuk | 6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3

General

Target

6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe
Size

170KB
MD5

6076c6a3207cde7fd0f2f28924efb63d
SHA1

2f7cc3d8c7acd1614bf064f823b7f33078bff3e2
SHA256

6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3
SHA512

a18d3feb5a0b571d703e9bfeb5cea33768ddc8e0b8bea4f80f4a18c4dfa4aca2067182260efbd2a33483067d640b7fb7c025b011a0ab044f2cfe7bd8771066fe

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe"	reg.exe

Drops file in Program Files directory 64 IoCs

Processes:

taskhost.exe

description	ioc	process
File opened for modification	C:\Program Files\7-Zip\Lang\zh-tw.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\Orange Circles.htm	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\COPYRIGHT	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\jfr\profile.jfc	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Pets\Pets_btn-previous-static.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Push\1047x576black.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\ext\access-bridge-64.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Pangnirtung	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\Lang\pa-in.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\ipssrl.xml	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\BabyBoy\BabyBoyMainToScenesBackground.wmv	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\SpecialOccasion\NavigationUp_SelectionSubpicture.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Atikokan	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Manaus	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\hu-HU\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\OldAge\1047x576black.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\rectangle_travel_Thumbnail.bmp	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\SpecialOccasion\whitevignette1047.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Africa\Tunis	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Indiana\Winamac	taskhost.exe
File opened for modification	C:\Program Files\Internet Explorer\SIGNUP\install.ins	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\db\README-JDK.html	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\deploy\messages_fr.properties	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\Lang\lv.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\hwrusash.dat	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\de-DE\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\ResizingPanels\NavigationUp_SelectionSubpicture.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Sports\SportsNotesBackground_PAL.wmv	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\include\win32\bridge\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\ext\sunec.jar	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\LayeredTitles\NavigationLeft_ButtonGraphic.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Argentina\San_Luis	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Asia\Jakarta	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\OrangeCircles.jpg	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\rtstreamsource.ax	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Argentina\Rio_Gallegos	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\en-US\boxed-split.avi	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\VSTO\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\security\java.security	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Godthab	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Atlantic\Bermuda	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Antarctica\Mawson	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\dicjp.bin	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Performance\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Pets\Notes_LOOP_BG_PAL.wmv	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\SpecialOccasion\SpecialNavigationRight_ButtonGraphic.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\include\win32\bridge\AccessBridgeCallbacks.h	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Sao_Paulo	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Santo_Domingo	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Asia\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\LayeredTitles\NavigationLeft_SelectionSubpicture.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\applet\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\fonts\LucidaBrightDemiBold.ttf	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Asia\Amman	taskhost.exe
File opened for modification	C:\Program Files\CheckpointRequest.TTS	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\ResizingPanels\bandwidth.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Sports\SportsMainToNotesBackground_PAL.wmv	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\include\jawt.h	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\jfr\default.jfc	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Etc\GMT+8	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\fsdefinitions\keypad.xml	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\offset.ax	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\ResizingPanels\NavigationRight_SelectionSubpicture.png	taskhost.exe
File opened for modification	C:\Program Files\Internet Explorer\es-ES\RyukReadMe.txt	taskhost.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe

pid process

1628 6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe

description pid process

Token: SeDebugPrivilege 1628 6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe

pid	process
1628	6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe

description	pid	process
Token: SeDebugPrivilege	1628	6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.execmd.exe

description	pid	process	target process
PID 1628 wrote to memory of 1312	1628	6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe	cmd.exe
PID 1628 wrote to memory of 1312	1628	6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe	cmd.exe
PID 1628 wrote to memory of 1312	1628	6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe	cmd.exe
PID 1628 wrote to memory of 1224	1628	6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe	taskhost.exe
PID 1628 wrote to memory of 1320	1628	6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe	Dwm.exe
PID 1628 wrote to memory of 1312	1628	6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe	cmd.exe
PID 1312 wrote to memory of 468	1312	cmd.exe	reg.exe
PID 1312 wrote to memory of 468	1312	cmd.exe	reg.exe
PID 1312 wrote to memory of 468	1312	cmd.exe	reg.exe

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1320

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
- Drops file in Program Files directory
PID:1224

C:\Users\Admin\AppData\Local\Temp\6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe
"C:\Users\Admin\AppData\Local\Temp\6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1628

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\Admin\AppData\Local\Temp\6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:1312

C:\Windows\system32\reg.exe
REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\6ea3da41f8159b93733ecf63c786880e4095f4107c995acc4e841aa51fc3b5e3.exe" /f
3⤵
- Adds Run key to start application
PID:468

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1224-56-0x000000013FFF0000-0x000000014037E000-memory.dmp

Filesize
3.6MB

Download
memory/1224-58-0x000000013FFF0000-0x000000014037E000-memory.dmp

Filesize
3.6MB

Download
memory/1628-55-0x000007FEFC2D1000-0x000007FEFC2D3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads