ryuk | e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39

General

Target

e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe
Size

170KB
MD5

b8ebb6a557b474929505f647ebce05d6
SHA1

8b45c835225766c631224fb5c49259fcc12d898f
SHA256

e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39
SHA512

aa9ee807e94763911cccbf456aa98fb230dfd6fc5ab08e5384b5c018478fcfb8063b4632e937a194777104e76deb113508ec44533fe6d122f8d2b3306b7515fa

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
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\\e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe

Drops file in Program Files directory 64 IoCs

Processes:

taskhost.exe

description	ioc	process
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\Genko_1.emf	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\ShadesOfBlue.jpg	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\BabyBoy\BabyBoyScenesBackground.wmv	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Performance\title_trans_scene.wmv	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\passport.png	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\MSInfo\en-US\RyukReadMe.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\Common Files\System\Ole DB\de-DE\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Stacking\15x15dot.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\WhiteDot.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Memories\Notes_content-background.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\ResizingPanels\RyukReadMe.txt	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\en-US\join.avi	taskhost.exe
File opened for modification	C:\Program Files\Common Files\SpeechEngines\Microsoft\TTS20\fr-FR\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\ado\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Sports\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\ja-JP\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\SpeechEngines\Microsoft\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Performance\Notes_loop.wmv	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Performance\Title_Trans_Notes_PAL.wmv	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\7-Zip\Lang\de.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\Ole DB\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\en-US\boxed-join.avi	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\DVD Maker\Shared\DvdStyles\Pets\Title_Page_Ref_PAL.wmv	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Stacking\1047x576black.png	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\Lang\uz.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\Ole DB\ja-JP\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Shatter\NavigationLeft_ButtonGraphic.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Stacking\720x480icongraphic.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\Filters.xml	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\db\bin\ij.bat	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\MSInfo\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Pets\Pets_frame-highlight.png	taskhost.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\db\bin\NetworkServerControl.bat	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Memories\Title_mainImage-mask.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Performance\ParentMenuButtonIcon.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Push\NavigationRight_SelectionSubpicture.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\rectangle_postage_Thumbnail.bmp	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\btn-previous-static.png	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\fsdefinitions\oskmenu.xml	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\HueCycle\NavigationRight_ButtonGraphic.png	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\shadowonlyframe_selectionsubpicture.png	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Triedit\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\System\ado\en-US\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Full\pushplaysubpicture.png	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\fsdefinitions\numbers\numbase.xml	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\hwrcommonlm.dat	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\ipsfra.xml	taskhost.exe
File opened for modification	C:\Program Files\DisconnectRestore.pptx	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\bod_r.TTF	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Memories\btn-back-static.png	taskhost.exe
File opened for modification	C:\Program Files\7-Zip\Lang\ko.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\fsdefinitions\keypad\RyukReadMe.txt	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\fsdefinitions\main\baseAltGr_rtl.xml	taskhost.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\ipsdan.xml	taskhost.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\LayeredTitles\RyukReadMe.txt	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\7-Zip\Lang\da.txt	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\Common Files\SpeechEngines\Microsoft\TTS20\de-DE\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:

e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe

pid process

956 e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe

description pid process

Token: SeDebugPrivilege 956 e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe

pid	process
956	e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe

description	pid	process
Token: SeDebugPrivilege	956	e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.execmd.exe

description	pid	process	target process
PID 956 wrote to memory of 520	956	e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe	cmd.exe
PID 956 wrote to memory of 520	956	e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe	cmd.exe
PID 956 wrote to memory of 520	956	e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe	cmd.exe
PID 956 wrote to memory of 1212	956	e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe	taskhost.exe
PID 956 wrote to memory of 1308	956	e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe	Dwm.exe
PID 956 wrote to memory of 520	956	e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe	cmd.exe
PID 520 wrote to memory of 568	520	cmd.exe	reg.exe
PID 520 wrote to memory of 568	520	cmd.exe	reg.exe
PID 520 wrote to memory of 568	520	cmd.exe	reg.exe

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1308

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
- Drops file in Program Files directory
PID:1212

C:\Users\Admin\AppData\Local\Temp\e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe
"C:\Users\Admin\AppData\Local\Temp\e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:956

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\e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:520

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\e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe" /f
3⤵
- Adds Run key to start application
PID:568

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/520-60-0x000000013F920000-0x000000013FCAE000-memory.dmp

Filesize
3.6MB

Download
memory/956-55-0x000007FEFC241000-0x000007FEFC243000-memory.dmp

Filesize
8KB

Download
memory/1212-56-0x000000013F920000-0x000000013FCAE000-memory.dmp

Filesize
3.6MB

Download
memory/1212-58-0x000000013F920000-0x000000013FCAE000-memory.dmp

Filesize
3.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads