Analysis
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max time kernel
209s -
max time network
230s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
01-02-2022 01:34
Static task
static1
Behavioral task
behavioral1
Sample
26a406f910570e67858db0eb713b135a98bb00856ba05cf8d4ad54233a9196a9.dll
Resource
win7-en-20211208
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
26a406f910570e67858db0eb713b135a98bb00856ba05cf8d4ad54233a9196a9.dll
Resource
win10v2004-en-20220113
windows10-2004_x64
0 signatures
0 seconds
General
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Target
26a406f910570e67858db0eb713b135a98bb00856ba05cf8d4ad54233a9196a9.dll
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Size
57KB
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MD5
5c26c665fc66b914e2e3d9114e23256f
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SHA1
81dd2a490042854dbbc3cf3cfef47617c9933457
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SHA256
26a406f910570e67858db0eb713b135a98bb00856ba05cf8d4ad54233a9196a9
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SHA512
995b3ae4be60a5b51577d731910ef587d7ff8937e735b6615d15be7f48a8e5c8dbece0212c71ad61f5dfaaabb835add46114c482c3394d5c79ac81a9b74a30fb
Score
10/10
Malware Config
Extracted
Path
C:\ProgramData\Package Cache\{ef6b00ec-13e1-4c25-9064-b2f383cb8412}\674123-Readme.txt
Family
netwalker
Ransom Note
Hi!
Your files are encrypted by Netwalker.
All encrypted files for this computer has extension: .674123
--
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_674123:
dsN39op/JhcGGQhsh4h6v2KMB5Ae4q8l+v83iUD7A7NXXOhGe+
A2Pm2EE9NOiw8QIX9r151rAFLCa9aWTuJ6UpIPqP6n1md8QNnK
oAgmkDtL0z2Scf4AVoz5AdGZC0DmC7nWk0ngqVsOeHPL+EJioc
QfYqnpVHwGXfm7+lFR4v30QFlVTU2mITv6jLjguIN+TZsWsp+U
R0AhdpLPzqZYKAVlbMpiVXOrrPTIvTxWMfyjoTsMpbNJQTZE/L
osygYf6m7Og+mVmgY82MG8UymgbZS1np8ohlZ3CQ==}
URLs
http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion
http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion
Signatures
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Netwalker Ransomware
Ransomware family with multiple versions. Also known as MailTo.
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Modifies extensions of user files 3 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File opened for modification C:\Users\Admin\Pictures\DismountWait.tiff rundll32.exe File opened for modification C:\Users\Admin\Pictures\OptimizeReceive.tiff rundll32.exe File opened for modification C:\Users\Admin\Pictures\UnpublishWatch.tiff rundll32.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops file in Program Files directory 64 IoCs
description ioc Process File opened for modification C:\Program Files\WindowsApps\Microsoft.SkypeApp_14.53.77.0_x64__kzf8qxf38zg5c\UtilitiesCpp.winmd rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.19071.19011.0_x64__8wekyb3d8bbwe\Assets\contrast-black\OrientationControlMiddleCircle.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\images\contrast-white\OneNoteAppList.targetsize-32.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\CardUIBkg.scale-400.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_10.1906.2182.0_x64__8wekyb3d8bbwe\Assets\AlarmsAppList.contrast-black_targetsize-32_altform-unplated.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxA-Google.scale-200.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxA-Yahoo-Dark.scale-400.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.19071.19011.0_x64__8wekyb3d8bbwe\Assets\contrast-white\AppList.targetsize-60_altform-unplated_contrast-white.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\EmptyCalendarSearch.scale-400.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\ExchangeLargeTile.scale-400.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.22742.0_x64__8wekyb3d8bbwe\Assets\contrast-white\AppList.scale-200_contrast-white.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.SkypeApp_14.53.77.0_x64__kzf8qxf38zg5c\Assets\Audio\Skype_Video_Msg_Stop.m4a rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsStore_11910.1002.5.0_x64__8wekyb3d8bbwe\Assets\AppTiles\StoreAppList.targetsize-16_altform-unplated.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxSpeechToTextOverlay_1.17.29001.0_x64__8wekyb3d8bbwe\AppxManifest.xml rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MSPaint_6.1907.29027.0_x64__8wekyb3d8bbwe\TelemetryUWP.winmd rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.People_10.1902.633.0_x64__8wekyb3d8bbwe\AppxMetadata\CodeIntegrity.cat rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsStore_11910.1002.5.0_x64__8wekyb3d8bbwe\Microsoft.UI.Xaml.winmd rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\LinkedInboxWideTile.scale-125.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-black\HxA-Advanced-Light.scale-200.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.19071.19011.0_x64__8wekyb3d8bbwe\Assets\contrast-black\AppList.targetsize-72_contrast-black.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.19071.19011.0_x64__8wekyb3d8bbwe\Assets\contrast-black\MusicStoreLogo.scale-200_contrast-black.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_10.1906.2182.0_x64__8wekyb3d8bbwe\Assets\AlarmsAppList.targetsize-96_altform-lightunplated.png rundll32.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\include\classfile_constants.h rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxApp_48.49.31001.0_x64__8wekyb3d8bbwe\Assets\GamesXboxHubAppList.targetsize-64_altform-unplated_contrast-high.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\HxA-Generic-Dark.scale-150.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\RunningLate.scale-80.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\accessibilitychecker\styles.css rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_3.6.73.0_x64__8wekyb3d8bbwe\Assets\LockScreenLogo.scale-200.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.19071.19011.0_x64__8wekyb3d8bbwe\Assets\contrast-white\WideLogo.scale-200_contrast-white.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxApp_48.49.31001.0_x64__8wekyb3d8bbwe\Assets\GamesXboxHubAppList.targetsize-32_contrast-white.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxGamingOverlay_2.34.28001.0_x64__8wekyb3d8bbwe\resources.pri rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Integration\C2RManifest.Proof.Culture.msi.16.es-es.xml rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\SwipeTeachingCalloutArchiveImage.layoutdir-RTL.gif rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1907.3152.0_x64__8wekyb3d8bbwe\Assets\InsiderHubAppList.targetsize-256_altform-unplated_contrast-white.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxA-Exchange.scale-125.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\images\OneNotePageMedTile.scale-400.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.19071.19011.0_x64__8wekyb3d8bbwe\Assets\FileExtension.targetsize-24.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\GenericMailBadge.scale-150.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.19071.19011.0_x64__8wekyb3d8bbwe\microsoft.system.package.metadata\S-1-5-21-1346565761-3498240568-4147300184-1000-MergedResources-0.pri rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.YourPhone_0.19051.7.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-black\LargeTile.scale-200_contrast-black.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.20875.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-64_altform-unplated.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_10.1906.2182.0_x64__8wekyb3d8bbwe\TimeControls.winmd rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_10.1906.2182.0_x64__8wekyb3d8bbwe\TimeBackground.winmd rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxApp_48.49.31001.0_x64__8wekyb3d8bbwe\Assets\GamesXboxHubAppList.targetsize-36_altform-unplated_contrast-white.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\images\contrast-black\OneNoteNewNoteWideTile.scale-150.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxApp_48.49.31001.0_x64__8wekyb3d8bbwe\PRNDMediaSource.winmd rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxCalendarAppList.targetsize-80_altform-unplated.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\HxA-Generic-Light.scale-300.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.19071.19011.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\contrast-black\WideLogo.scale-100_contrast-black.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.SkypeApp_14.53.77.0_x64__kzf8qxf38zg5c\resources.pri rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.19071.19011.0_x64__8wekyb3d8bbwe\Assets\contrast-black\OrientationControlConeHover.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Xbox.TCUI_1.23.28002.0_x64__8wekyb3d8bbwe\AppxBlockMap.xml rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1907.3152.0_x64__8wekyb3d8bbwe\Assets\InsiderHubAppList.targetsize-64_contrast-white.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.People_10.1902.633.0_x64__8wekyb3d8bbwe\Assets\Json\EmailAction-AdaptiveCard.json rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.SkypeApp_14.53.77.0_x64__kzf8qxf38zg5c\resources\strings\LocalizedStrings_zh-TW.json rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxA-Generic-Light.scale-100.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-black\HxA-Advanced-Dark.scale-125.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\images\contrast-white\OneNoteAppList.scale-150.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.22742.0_x64__8wekyb3d8bbwe\Assets\contrast-white\BadgeLogo.scale-400_contrast-white.png rundll32.exe File opened for modification C:\Program Files\Java\jre1.8.0_66\lib\javaws.jar rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.20875.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-30_altform-unplated.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebpImageExtension_1.0.22753.0_x64__8wekyb3d8bbwe\Assets\LargeTile.scale-400.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_2019.19071.12548.0_x64__8wekyb3d8bbwe\meBoot.min.js rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.1906.55.0_x64__8wekyb3d8bbwe\Assets\CalculatorAppList.targetsize-60_altform-unplated_contrast-black.png rundll32.exe -
Suspicious behavior: EnumeratesProcesses 56 IoCs
pid Process 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe 1328 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1328 rundll32.exe Token: SeImpersonatePrivilege 1328 rundll32.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4820 wrote to memory of 1328 4820 rundll32.exe 83 PID 4820 wrote to memory of 1328 4820 rundll32.exe 83 PID 4820 wrote to memory of 1328 4820 rundll32.exe 83
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\26a406f910570e67858db0eb713b135a98bb00856ba05cf8d4ad54233a9196a9.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:4820 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\26a406f910570e67858db0eb713b135a98bb00856ba05cf8d4ad54233a9196a9.dll,#12⤵
- Modifies extensions of user files
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1328
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