ryuk | c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e

General

Target

c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe
Size

155KB
MD5

1354ac0d5be0c8d03f4e3aba78d2223e
SHA1

a44a8c8c8f167d455db41316f3616ef5703bffff
SHA256

c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e
SHA512

b9b785f3b4640b2cd508e748032c8b85519464d8e36887993bb2e86d92ff72fe8f086a659b0b5e5ef0561db146573aa3beb7bb929fc85d3635531c3d981eaa60

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: 1CN2iQbBikFK9jM34Nb3WLx5DCenQLnbXp Ryuk

Emails

[email protected]

Wallets

1CN2iQbBikFK9jM34Nb3WLx5DCenQLnbXp

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\\c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe"	reg.exe

Drops file in Program Files directory 64 IoCs

Processes:

taskhost.exe

description	ioc	process
File opened for modification	C:\Program Files\Internet Explorer\SIGNUP\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\fsdefinitions\main\base_jpn.xml	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\es-ES\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Memories\button-highlight.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\soniccolorconverter.ax	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Australia\Sydney	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\an.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\cs-CZ\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\hwruklm.dat	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Push\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Sports\SportsMainToScenesBackground.wmv	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\fonts\LucidaTypewriterRegular.ttf	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Argentina\La_Rioja	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Triedit\es-ES\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\SpeechEngines\Microsoft\TTS20\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\HueCycle\15x15dot.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Pets\Pets_frame-border.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Asia\Hong_Kong	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\THIRDPARTYLICENSEREADME.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\ipsnor.xml	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\tzmappings	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\Etc\UCT	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\Indiana\Vevay	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Etc\GMT-14	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\Lang\ga.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\fsdefinitions\osknumpad.xml	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Etc\GMT-12	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Rectangles\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\FindAssert.i64	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\EET	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Europe\Volgograd	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\hwrenalm.dat	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\Memo.emf	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\db\lib\derbyLocale_ko_KR.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Asia\Chita	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Africa\Abidjan	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Pacific\Guadalcanal	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\Ole DB\ja-JP\sqlxmlx.rll.mui	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\Ole DB\sqlxmlx.rll	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\BabyBoy\BabyBoyMainToNotesBackground_PAL.wmv	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\16_9-frame-background.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Kentucky\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Indian\Christmas	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\Wrinkled_Paper.gif	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\ado\msado21.tlb	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\passport_mask_right.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\PassportMask.wmv	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Pacific\Efate	taskhost.exe
File opened for modification	C:\Program Files\Common Files\SpeechEngines\Microsoft\TTS20\es-ES\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\PassportMask_PAL.wmv	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\db\lib\derbyLocale_cs.jar	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\security\trusted.libraries	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\play-background.png	taskhost.exe
File opened for modification	C:\Program Files\Internet Explorer\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Blanc-Sablon	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Atlantic\Reykjavik	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\Lang\nl.txt	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\Lang\mr.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\ado\msado28.tlb	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\HueCycle\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:

c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe

pid process

828 c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe

description pid process

Token: SeDebugPrivilege 828 c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe

pid	process
828	c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe

description	pid	process
Token: SeDebugPrivilege	828	c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.execmd.exe

description	pid	process	target process
PID 828 wrote to memory of 1684	828	c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe	cmd.exe
PID 828 wrote to memory of 1684	828	c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe	cmd.exe
PID 828 wrote to memory of 1684	828	c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe	cmd.exe
PID 828 wrote to memory of 1224	828	c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe	taskhost.exe
PID 828 wrote to memory of 1348	828	c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe	Dwm.exe
PID 828 wrote to memory of 1684	828	c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe	cmd.exe
PID 828 wrote to memory of 2044	828	c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe	conhost.exe
PID 1684 wrote to memory of 1480	1684	cmd.exe	reg.exe
PID 1684 wrote to memory of 1480	1684	cmd.exe	reg.exe
PID 1684 wrote to memory of 1480	1684	cmd.exe	reg.exe

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

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1348

C:\Users\Admin\AppData\Local\Temp\c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe
"C:\Users\Admin\AppData\Local\Temp\c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:828

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\c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:1684

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\c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe" /f
3⤵
- Adds Run key to start application
PID:1480

C:\Windows\system32\conhost.exe
\??\C:\Windows\system32\conhost.exe "-1769671524-2047063744-17257684391542644666-908914415205421536315793505922074380614"
1⤵
PID:2044

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

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Downloads

memory/828-55-0x000007FEFC401000-0x000007FEFC403000-memory.dmp

Filesize
8KB

Download
memory/1224-56-0x000000013F950000-0x000000013FCDA000-memory.dmp

Filesize
3.5MB

Download
memory/1224-57-0x000000013F950000-0x000000013FCDA000-memory.dmp

Filesize
3.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads