netwalker | cf80fd95183ce1305becf6ea91d4ccfa0d87d923499d08939324d63c0ed22dc4

General

Target

cf80fd95183ce1305becf6ea91d4ccfa0d87d923499d08939324d63c0ed22dc4.dll
Size

57KB
MD5

1b6a2bfa39bcc335b1aff8217fe9e05f
SHA1

c21d6898e2a17bdb4a6af43534ee9c6534b244c9
SHA256

cf80fd95183ce1305becf6ea91d4ccfa0d87d923499d08939324d63c0ed22dc4
SHA512

c9feee9a867f2f9c1b1b71219f0906a547e89b138cbb1d08f6c3a5da63138df28c1752be57393ede93a7a910d86f9f3c5479bc4586ba909e94b1f18e866bb8d6

Score

10^/10

netwalker ransomware spyware

Malware Config

Extracted

Path

C:\Users\Admin\Contacts\8D94CC-Readme.txt

Family

netwalker

Ransom Note

Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .8d94cc -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_8d94cc: bnwzv12ieNqa/5iCaK92ZcHpZcAvIgCzL/Rb65AW72+ukWi1tF xFe7Fti9hZGl9zM+BY5HGvAu00xD/OgDm0v9tkMJTvTA8x65Yy i5W6Ia6cXOIypfb+GAP4bartAo73+CodnGoi94ePT6D3+bENML hNKs9wHoII/uIJiJ69twnSiaTe0+9728C5pYiDjGg/JuVfAUEX DGH9GA8OPtPzsWRFwcYT3up76DPp/0MR8SoUMCZbwrbYsI4wsK B4VCUlg8FcMevl/qh2L5VJboQzEny+t7PTN7VesA==}

URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

Netwalker Ransomware
Ransomware family with multiple versions. Also known as MailTo.
ransomware netwalker

Modifies extensions of user files 13 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

rundll32.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\StepPush.tiff => C:\Users\Admin\Pictures\StepPush.tiff.8d94cc	rundll32.exe
File renamed	C:\Users\Admin\Pictures\DismountDebug.raw => C:\Users\Admin\Pictures\DismountDebug.raw.8d94cc	rundll32.exe
File renamed	C:\Users\Admin\Pictures\RepairStep.crw => C:\Users\Admin\Pictures\RepairStep.crw.8d94cc	rundll32.exe
File renamed	C:\Users\Admin\Pictures\SearchInitialize.crw => C:\Users\Admin\Pictures\SearchInitialize.crw.8d94cc	rundll32.exe
File renamed	C:\Users\Admin\Pictures\PublishWrite.tif => C:\Users\Admin\Pictures\PublishWrite.tif.8d94cc	rundll32.exe
File renamed	C:\Users\Admin\Pictures\UnblockWrite.crw => C:\Users\Admin\Pictures\UnblockWrite.crw.8d94cc	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\UnpublishUnregister.tiff	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\StepPush.tiff	rundll32.exe
File renamed	C:\Users\Admin\Pictures\SendRedo.tiff => C:\Users\Admin\Pictures\SendRedo.tiff.8d94cc	rundll32.exe
File renamed	C:\Users\Admin\Pictures\SetSearch.tif => C:\Users\Admin\Pictures\SetSearch.tif.8d94cc	rundll32.exe
File renamed	C:\Users\Admin\Pictures\UnpublishUnregister.tiff => C:\Users\Admin\Pictures\UnpublishUnregister.tiff.8d94cc	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\SendRedo.tiff	rundll32.exe
File renamed	C:\Users\Admin\Pictures\HideEdit.tif => C:\Users\Admin\Pictures\HideEdit.tif.8d94cc	rundll32.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

Drops file in Program Files directory 7468 IoCs

Processes:

rundll32.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\Tracker\form_responses.gif	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\PAGESIZE\PGLBL001.XML	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\1033\PUBSPAPR\ZPDIR11F.GIF	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.browser.attach.ja_5.5.0.165303.jar	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PE00668_.WMF	rundll32.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\lua\modules\sandbox.luac	rundll32.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\bookbig.gif	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.e4.rcp_1.3.100.v20141007-2033\feature.properties	rundll32.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\locale\pt_BR\LC_MESSAGES\vlc.mo	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\OutlookAutoDiscover\YAHOO.COM.AU.XML	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms5\FormsColorChart.html	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\BL00105_.WMF	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\BS00440_.WMF	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\update_tracking\org-netbeans-core.xml	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms3\rtf_justify.gif	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107308.WMF	rundll32.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\lua\http\dialogs\equalizer_window.html	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\AN00015_.WMF	rundll32.exe
File created	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\8D94CC-Readme.txt	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\POST.CFG	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\ModuleAutoDeps\org-netbeans-core.xml	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\HH02282_.WMF	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\XML2WORD.XSL	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms\FormsTemplates\Hardware Tracker.fdt	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Miquelon	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\DGTOC.DPV	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\BULLETS\BD14757_.GIF	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\FormsStyles\Swirl\TAB_ON.GIF	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms3\FormsStyles\LightSpirit.css	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms\FieldTypePreview\DATE.JPG	rundll32.exe
File opened for modification	C:\Program Files\7-Zip\Lang\el.txt	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\1033\GrooveForms5\FormsStyles\BrightYellow.css	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\1033\GrooveForms5\FormsStyles\Beige.css	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.docs_5.5.0.165303.jar	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Antarctica\Palmer	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\org-netbeans-modules-autoupdate-cli.jar	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Argentina\Buenos_Aires	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\PUBBA\MSPUB5B.BDR	rundll32.exe
File created	C:\Program Files\VideoLAN\VLC\locale\lt\LC_MESSAGES\8D94CC-Readme.txt	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\FormsStyles\STS2\HEADER.GIF	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PE00559_.WMF	rundll32.exe
File opened for modification	C:\Program Files\Java\jre7\lib\zi\America\Martinique	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107514.WMF	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PE06049_.WMF	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Templates\1033\Access\Part\Dialog.accdt	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Colors\Pushpin.xml	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Pacific\Pitcairn	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.emf.common_2.10.1.v20140901-1043\META-INF\ECLIPSE_.SF	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\update_tracking\org-netbeans-lib-uihandler.xml	rundll32.exe
File created	C:\Program Files (x86)\Microsoft Office\Office14\1033\QuickStyles\8D94CC-Readme.txt	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\NA02404_.WMF	rundll32.exe
File opened for modification	C:\Program Files\7-Zip\descript.ion	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\Publisher\Backgrounds\WB02073_.GIF	rundll32.exe
File opened for modification	C:\Program Files\Java\jre7\lib\zi\Atlantic\Canary	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Templates\1033\Access\Part\Msgbox.accdt	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO00305_.WMF	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PH02417U.BMP	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PH02053J.JPG	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveProjectToolset\TABMASK.BMP	rundll32.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Etc\GMT-11	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\BULLETS\BD21314_.GIF	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\NA01064_.WMF	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PH02746U.BMP	rundll32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolBMPs\NotifierDownArrow.jpg	rundll32.exe

Suspicious behavior: EnumeratesProcesses 250 IoCs

Processes:

rundll32.exe

pid	process
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe
1088	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 1088 rundll32.exe
Token: SeImpersonatePrivilege 1088 rundll32.exe

description	pid	process
Token: SeDebugPrivilege	1088	rundll32.exe
Token: SeImpersonatePrivilege	1088	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 536 wrote to memory of 1088	536	rundll32.exe	rundll32.exe
PID 536 wrote to memory of 1088	536	rundll32.exe	rundll32.exe
PID 536 wrote to memory of 1088	536	rundll32.exe	rundll32.exe
PID 536 wrote to memory of 1088	536	rundll32.exe	rundll32.exe
PID 536 wrote to memory of 1088	536	rundll32.exe	rundll32.exe
PID 536 wrote to memory of 1088	536	rundll32.exe	rundll32.exe
PID 536 wrote to memory of 1088	536	rundll32.exe	rundll32.exe
PID 1088 wrote to memory of 4872	1088	rundll32.exe	notepad.exe
PID 1088 wrote to memory of 4872	1088	rundll32.exe	notepad.exe
PID 1088 wrote to memory of 4872	1088	rundll32.exe	notepad.exe
PID 1088 wrote to memory of 4872	1088	rundll32.exe	notepad.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\cf80fd95183ce1305becf6ea91d4ccfa0d87d923499d08939324d63c0ed22dc4.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:536

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\cf80fd95183ce1305becf6ea91d4ccfa0d87d923499d08939324d63c0ed22dc4.dll,#1
2⤵
- Modifies extensions of user files
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1088

C:\Windows\SysWOW64\notepad.exe
C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\8D94CC-Readme.txt"
3⤵
PID:4872

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\Desktop\8D94CC-Readme.txt
MD5
599ea13c819fa6326de6cea86fdf793a

SHA1
98b22b0b9849b58dc250b232fb4b5f09981ac530

SHA256
c4c7b327426f87280affe969f8c853139f4b706bc6af2fdfc51f4ff407f27896

SHA512
2fe7ecb9f01a2e154c956c7698523349b1e0fb577d879c78aacc3de0ee832359acb2593299238fc8afce55f7871cac75f131e1f9eb585d748b6830be166f43da

Download Submit
memory/1088-0-0x0000000000000000-mapping.dmp

Download
memory/4872-1-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads