Analysis
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max time kernel
152s -
max time network
118s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
01-02-2022 01:22
Static task
static1
Behavioral task
behavioral1
Sample
d6eac8db484a1ac3530801606efec34c4d1a52fc66aabc3bab45bc3f0bcc3439.dll
Resource
win7-en-20211208
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
d6eac8db484a1ac3530801606efec34c4d1a52fc66aabc3bab45bc3f0bcc3439.dll
Resource
win10v2004-en-20220113
windows10-2004_x64
0 signatures
0 seconds
General
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Target
d6eac8db484a1ac3530801606efec34c4d1a52fc66aabc3bab45bc3f0bcc3439.dll
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Size
57KB
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MD5
73428d129222a3b16990ff1dbe154d91
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SHA1
c52e0db970b60aff3833afd5e82696646ff5d135
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SHA256
d6eac8db484a1ac3530801606efec34c4d1a52fc66aabc3bab45bc3f0bcc3439
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SHA512
66ce4b067ae0a5a5f18166895be120122bb5f3d7a8342a17b49666817a7bef3fb2e1f902bb8de3531000844a4ba63cfacb77bd97cc4e27343b7182e15650bff6
Score
10/10
Malware Config
Extracted
Path
C:\Program Files\VideoLAN\VLC\locale\zh_CN\LC_MESSAGES\74E80A-Readme.txt
Family
netwalker
Ransom Note
Hi!
Your files are encrypted by Netwalker.
All encrypted files for this computer has extension: .74e80a
--
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_74e80a:
4zOwyGMIWRFq3Hg5KqpG+F+WuGBEixSIDFZxmRJaf1uke0GA7l
J0vy/5tMltRrZ3u0pZ9pg8+Z8LxGXp5yg3VNr7KHWWc0VNknW+
E1z7OD0cMMiEBgZ0BWS9mRs82C+ojQkyXRun1hNfuXeYxaSWgQ
DOGnCTNEgOsnTrfZDV2GfmxyaeRMR1S5hT3GnhrA2IS6qVZSGb
3tU4/3dMidxxwzJD+mFjCakhIL8GVce7aX/dxO6eN1nyzpIVI2
pssyqvbEKDnMWsQ2K2BRzB9vK3CsP3uqUSEus31g==}
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 6 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\PingEnter.tiff => C:\Users\Admin\Pictures\PingEnter.tiff.74e80a rundll32.exe File renamed C:\Users\Admin\Pictures\CopyInvoke.crw => C:\Users\Admin\Pictures\CopyInvoke.crw.74e80a rundll32.exe File opened for modification C:\Users\Admin\Pictures\PingEnter.tiff rundll32.exe File renamed C:\Users\Admin\Pictures\DebugCompress.png => C:\Users\Admin\Pictures\DebugCompress.png.74e80a rundll32.exe File renamed C:\Users\Admin\Pictures\NewMount.raw => C:\Users\Admin\Pictures\NewMount.raw.74e80a rundll32.exe File renamed C:\Users\Admin\Pictures\ShowReceive.tif => C:\Users\Admin\Pictures\ShowReceive.tif.74e80a 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 (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\SettingsInternal.zip rundll32.exe File opened for modification C:\Program Files\ResumePublish.aifc rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\COUPON.POC rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\GROOVE_COL.HXC rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\CAGCAT10\CAGCAT10.MMW rundll32.exe File created C:\Program Files (x86)\Microsoft Office\Office14\Groove\Certificates\groove.net\ManagedObjects\74E80A-Readme.txt rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\as_IN\LC_MESSAGES\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Bibliography\Style\MLA.XSL rundll32.exe File created C:\Program Files\Java\jdk1.7.0_80\jre\lib\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files\Java\jre7\lib\zi\America\Barbados rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\core\core.jar rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\FormsFormTemplate.html rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Foundry.thmx rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\ckb\LC_MESSAGES\74E80A-Readme.txt rundll32.exe File created C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\Multimedia\MPP\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\OutlookAutoDiscover\PACBELL.NET.XML rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\FormsHomePageStyle.css rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\button_left.gif rundll32.exe File created C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\VisualBasic\1033\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Fonts\Couture.xml rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Fonts\Slipstream.xml rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolBMPs\MessageHistoryIconImagesMask.bmp rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\ro\LC_MESSAGES\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\CAGCAT10\J0183290.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\button_right.gif rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\locale\zu\LC_MESSAGES\vlc.mo rundll32.exe File opened for modification C:\Program Files\Java\jre7\lib\zi\Africa\Johannesburg rundll32.exe File created C:\Program Files\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\deploy\splash.gif rundll32.exe File created C:\Program Files (x86)\Adobe\Reader 9.0\Resource\SaslPrep\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBBA\MSPUB1A.BDR rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\ACCWIZ\ACWZTOOL.ACCDE rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PROOF\MSGR3EN.LEX rundll32.exe File opened for modification C:\Program Files\7-Zip\Lang\af.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Effects\Newsprint.eftx rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveDocumentReview\InactiveTabImageMask.bmp rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\Tracker\review_same_reviewers.gif rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\hr\LC_MESSAGES\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\CONVERT\1033\DELIMR.FAE rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\DISTLIST.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\CommonData\AlertImage_ContactLowMask.bmp rundll32.exe File created C:\Program Files\Java\jre7\lib\fonts\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\VisioCustom.propdesc rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Templates\1033\Access\Charitable Contributions.accdt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Templates\1033\Access\Contacts.accdt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\LINES\BD10219_.GIF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveDocumentReview\BodyPaneBackground.jpg rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\BULLETS\BD10254_.GIF rundll32.exe File created C:\Program Files\Java\jdk1.7.0_80\jre\lib\images\cursors\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\ENGIDX.DAT rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Oriel.thmx rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\CONVERT\1033\ACT3R.SAM rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\Certificates\groove.net\ManagedObjects\SignedManagedObjects.cer rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Stationery\1033\DADSHIRT.HTM rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\CONVERT\1033\OLAPPTR.FAE rundll32.exe File created C:\Program Files\Java\jre7\lib\zi\Antarctica\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\DGWEBAD.XML rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\ja\LC_MESSAGES\74E80A-Readme.txt rundll32.exe File created C:\Program Files (x86)\Microsoft Office\Office14\ACCWIZ\74E80A-Readme.txt rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\config\Modules\com-sun-tools-visualvm-application.xml rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Installed_resources14.xss rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\GROOVE_COL.HXT 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\VideoLAN\VLC\skins\winamp2.xml rundll32.exe -
Suspicious behavior: EnumeratesProcesses 16 IoCs
pid Process 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe 1824 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1824 rundll32.exe Token: SeImpersonatePrivilege 1824 rundll32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1100 wrote to memory of 1824 1100 rundll32.exe 27 PID 1100 wrote to memory of 1824 1100 rundll32.exe 27 PID 1100 wrote to memory of 1824 1100 rundll32.exe 27 PID 1100 wrote to memory of 1824 1100 rundll32.exe 27 PID 1100 wrote to memory of 1824 1100 rundll32.exe 27 PID 1100 wrote to memory of 1824 1100 rundll32.exe 27 PID 1100 wrote to memory of 1824 1100 rundll32.exe 27
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\d6eac8db484a1ac3530801606efec34c4d1a52fc66aabc3bab45bc3f0bcc3439.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1100 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\d6eac8db484a1ac3530801606efec34c4d1a52fc66aabc3bab45bc3f0bcc3439.dll,#12⤵
- Modifies extensions of user files
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1824
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