medusalocker | b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649

Analysis

max time kernel
128s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
16-11-2022 10:01

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General

Target

medusa.exe
Size

719KB
MD5

8474039d83805eb7b447325c3a8d1ebb
SHA1

a07d537f4253745a087709a9a07c449f84deed8d
SHA256

b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649
SHA512

3272091bbf123ba5e1592e8b2bd7740cddcb174fa158bc6980b25ee61d92387e94a25284736253f83a6eea78b427f6717e888e843db9d7759cfe9a7676576438
SSDEEP

12288:q4UOTYQivI2qZ7aSgLwkFVpzUvest4ZEbjJLuhJVoM7SPd:bRTYVQ2qZ7aSgLwuVfstRJL6YM6

Score

10^/10

medusalocker neshta evasion persistence ransomware spyware stealer trojan

Malware Config

Extracted

Path

C:\Recovery_Instructions.html

Ransom Note

<html> <style type="text/css"> body { background-color: #f5f5f5; } h1, h3{ text-align: center; text-transform: uppercase; font-weight: normal; } /*---*/ .tabs1{ display: block; margin: auto; } .tabs1 .head{ text-align: center; float: top; padding: 0px; text-transform: uppercase; font-weight: normal; display: block; background: #81bef7; color: #DF0101; font-size: 30px; } .tabs1 .identi { font-size: 10px; text-align: center; float: top; padding: 15px; display: block; background: #81bef7; color: #DFDFDF; } .tabs .content { background: #f5f5f5; /*text-align: center;*/ color: #000000; padding: 25px 15px; font-size: 15px; font-weight: 400; line-height: 20px; } .tabs .content a { color: #df0130; font-size: 23px; font-style: italic; text-decoration: none; line-height: 35px; } .tabs .content .text{ padding: 25px; line-height: 1.2; } </style> <body> <div class="tabs1"> <div class="head" ><b>Your personal ID:</b></div> <div class="identi"> <span style="width:1000px; color: #ffffff; font-size: 10px;">A99724D6D0790684D5DFDC8054EC91E0F1888C30E7394F2D3E8CF5CF9B4E6F3ADF00B13ACDCDF65A937642C30A5EE6AC05A5C34FC7670D35C4206DD1C76F9248<br>770BC70D5148EF40C02ECDA6B271DB99065CEB2F645EE2684C1D935119469301D263CD72D2F9F87D8AE675E29B83D292D11430ABD02440F0F13AE5460209<br>CA5F622F89D0A4FF27ACCA96204CCB2C01BDE0B88C1FA2CF8618D0A89E0886F4E431B7BF5F1425EBCD6C4F2569A4CD613F66A7275D04F109EABF842C2BF2<br>7AAFDAE53A500D10C2FB1A4B87A95ACFF4B036A9C319B4C11F2DB8FD917E4C5879DC14AD13A3F1CE5DFECF37E8374E7CBBD92F7DE8CD0CBD673E2A7FA409<br>83B879542FAF6160BC5D3F00EE03D28B4D5901D46A07BCA0D7FA9CF07DC2CDAEB622B9B284DA8953EF004B95D2CB4BCADEE3FC4C98CBF179C7D8481EC47F<br>6CBFA4BCE8E851505A914413CA071777CD6216C33E7B209AA808BF4776C3C3D65D3211B29B67CE3250B458C86C08A519DF3E9278F16D2BE4A1171CBCC6E5<br>32C937281E0509189CB3B97FBEFB0CB640A1E9DF78795D5F58F0778C21309A6D31F24775603BA0872F76DA48A42DFF01F0597DB433156F550432F04BB8C4<br>236159E8A5558426043CA621D38D30A7DA701EB5DAE8D00BF4D8BE449C5D16AB18D769F12785A7897BF3BFE63841695F70EA352496B7E9F4AFB5C66FA4CE<br>3D6E293CBA65B099C2AD800AE913</span> <br>  </div> </div>  <div class="tabs">  <div class="tab"> <div id="tab-content1" class="content"> <div class="text">  <b>/!\ YOUR COMPANY NETWORK HAS BEEN PENETRATED /!\</b><br> <b>All your important files have been encrypted!</b><br><br> <hr> Your files are safe! Only modified. (RSA+AES)<br><br> ANY ATTEMPT TO RESTORE YOUR FILES WITH THIRD-PARTY SOFTWARE<br> WILL PERMANENTLY CORRUPT IT.<br> DO NOT MODIFY ENCRYPTED FILES.<br> DO NOT RENAME ENCRYPTED FILES.<br><br> No software available on internet can help you. We are the only ones able to<br> solve your problem.<br><br> We gathered highly confidential/personal data. These data are currently stored on<br> a private server. This server will be immediately destroyed after your payment.<br> If you decide to not pay, we will release your data to public or re-seller.<br> So you can expect your data to be publicly available in the near future..<br><br> We only seek money and our goal is not to damage your reputation or prevent<br> your business from running.<br><br> You will can send us 2-3 non-important files and we will decrypt it for free<br> to prove we are able to give your files back.<br><br>  <hr> <b>Contact us for price and get decryption software.</b><br><br> <a>http://gvlay6u4g53rxdi5.onion/31-LPy3hdSfGLBgLSfGcKN9rubDKoa1VMK4-NpnxG6mV6VqPPEFYJnVbNEWpIq61e3G3</a><br> * Note that this server is available via Tor browser only<br><br> Follow the instructions to open the link:<br> 1. Type the addres "https://www.torproject.org" in your Internet browser. It opens the Tor site.<br> 2. Press "Download Tor", then press "Download Tor Browser Bundle", install and run it.<br> 3. Now you have Tor browser. In the Tor Browser open "{{URL}}". <br> 4. Start a chat and follow the further instructions. <br><br> <hr> <b>If you can not use the above link, use the email:</b><br> <a href="[email protected]">[email protected]</a> <br><a href="[email protected]">[email protected]</a> <br> <b>* To contact us, create a new mail on the site:</b> <a href="https://protonmail.com">protonmail.com<br> <hr> <b>Make contact as soon as possible. Your private key (decryption key) <br> is only stored temporarily.<br><br> IF YOU DON'T CONTACT US WITHIN 72 HOURS, PRICE WILL BE HIGHER.</b><br> </div> </div> </div>   </div> </div>  </div> </div> </body> </html>

Emails

href="[email protected]">[email protected]</a>

Signatures

Detect Neshta payload 5 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\svhost.exe	family_neshta
C:\Users\Admin\AppData\Roaming\svhost.exe	family_neshta
C:\Users\Admin\AppData\Roaming\svhost.exe	family_neshta
C:\Windows\svchost.com	family_neshta
C:\Windows\svchost.com	family_neshta

MedusaLocker
Ransomware with several variants first seen in September 2019.
ransomware medusalocker

MedusaLocker payload 7 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\3582-490\medusa.exe	family_medusalocker
C:\Users\Admin\AppData\Local\Temp\3582-490\medusa.exe	family_medusalocker
C:\Users\Admin\AppData\Roaming\svhost.exe	family_medusalocker
C:\Users\Admin\AppData\Roaming\svhost.exe	family_medusalocker
C:\Users\Admin\AppData\Roaming\svhost.exe	family_medusalocker
C:\Users\Admin\AppData\Local\Temp\3582-490\svhost.exe	family_medusalocker
C:\Users\Admin\AppData\Local\Temp\3582-490\svhost.exe	family_medusalocker

Modifies system executable filetype association 2 TTPs 1 IoCs
persistence

Modify Registry
T1112

Change Default File Association
T1042

Processes:

medusa.exe

description ioc process

Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*" medusa.exe
Neshta
Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.
persistence spyware neshta

UAC bypass 3 TTPs 2 IoCs

evasion trojan

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

medusa.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	medusa.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	medusa.exe

Executes dropped EXE 4 IoCs

Processes:

medusa.exesvhost.exesvchost.comsvhost.exe

pid process

2692 medusa.exe
2488 svhost.exe
1608 svchost.com
2912 svhost.exe

Modifies extensions of user files 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

medusa.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\ConvertClose.crw => C:\Users\Admin\Pictures\ConvertClose.crw.ReadInstructions	medusa.exe
File renamed	C:\Users\Admin\Pictures\GroupGet.tif => C:\Users\Admin\Pictures\GroupGet.tif.ReadInstructions	medusa.exe
File renamed	C:\Users\Admin\Pictures\ConnectRead.crw => C:\Users\Admin\Pictures\ConnectRead.crw.ReadInstructions	medusa.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

svhost.exemedusa.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	svhost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	medusa.exe

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

Data from Local System
T1005

Credentials in Files
T1081
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

medusa.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" medusa.exe
Drops desktop.ini file(s) 1 IoCs

Processes:

medusa.exe

description ioc process

File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-2971393436-602173351-1645505021-1000\desktop.ini medusa.exe

description	ioc	process
File opened for modification	\??\Z:\$RECYCLE.BIN\S-1-5-21-2971393436-602173351-1645505021-1000\desktop.ini	medusa.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

medusa.exe

description	ioc	process
File opened (read-only)	\??\U:	medusa.exe
File opened (read-only)	\??\V:	medusa.exe
File opened (read-only)	\??\W:	medusa.exe
File opened (read-only)	\??\Y:	medusa.exe
File opened (read-only)	\??\I:	medusa.exe
File opened (read-only)	\??\N:	medusa.exe
File opened (read-only)	\??\O:	medusa.exe
File opened (read-only)	\??\P:	medusa.exe
File opened (read-only)	\??\J:	medusa.exe
File opened (read-only)	\??\L:	medusa.exe
File opened (read-only)	\??\M:	medusa.exe
File opened (read-only)	\??\Q:	medusa.exe
File opened (read-only)	\??\E:	medusa.exe
File opened (read-only)	\??\F:	medusa.exe
File opened (read-only)	\??\G:	medusa.exe
File opened (read-only)	\??\H:	medusa.exe
File opened (read-only)	\??\Z:	medusa.exe
File opened (read-only)	\??\S:	medusa.exe
File opened (read-only)	\??\T:	medusa.exe
File opened (read-only)	\??\X:	medusa.exe
File opened (read-only)	\??\A:	medusa.exe
File opened (read-only)	\??\B:	medusa.exe
File opened (read-only)	\??\K:	medusa.exe
File opened (read-only)	\??\R:	medusa.exe

Drops file in Program Files directory 64 IoCs

Processes:

medusa.exe

description	ioc	process
File opened for modification	C:\PROGRA~3\PACKAG~1\{57A73~1\VC_RED~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ieinstal.exe	medusa.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\UNINST~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmlaunch.exe	medusa.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{4D8DC~1\VC_RED~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOBD5D~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\INSTAL~1\setup.exe	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13169~1.31\MICROS~2.EXE	medusa.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{61087~1\VCREDI~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\ELEVAT~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\msedge.exe	medusa.exe
File opened for modification	C:\PROGRA~2\WI8A19~1\ImagingDevices.exe	medusa.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jaureg.exe	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\MSEDGE~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13169~1.31\MIA062~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\COOKIE~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\IDENTI~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13169~1.31\MICROS~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13169~1.31\MICROS~4.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmplayer.exe	medusa.exe
File opened for modification	C:\PROGRA~3\Adobe\Setup\{AC76B~1\setup.exe	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADelRCP.exe	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\Browser\WCCHRO~1\WCCHRO~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\64BITM~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmpconfig.exe	medusa.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmprph.exe	medusa.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{CA675~1\VCREDI~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroRd32.exe	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\Eula.exe	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\32BITM~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\WOW_HE~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\ADOBEA~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\MSInfo\msinfo32.exe	medusa.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ExtExport.exe	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\PWAHEL~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROBR~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\arh.exe	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\READER~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\MAINTE~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\FULLTR~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GO664E~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\NOTIFI~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13169~1.31\MICROS~3.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroCEF\RdrCEF.exe	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\BHO\IE_TO_~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\msedge.exe	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\MSEDGE~2.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\Download\{F3C4F~1\13169~1.31\MICROS~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\wabmig.exe	medusa.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{33D1F~1\VCREDI~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\AdobeARM.exe	medusa.exe
File opened for modification	C:\PROGRA~2\Google\Update\DISABL~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\INTERN~1\iexplore.exe	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\MSEDGE~3.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\MicrosoftEdgeUpdate.exe	medusa.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{EF6B0~1\VCREDI~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADOBEC~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ielowutil.exe	medusa.exe
File opened for modification	C:\PROGRA~3\MICROS~1\CLICKT~1\{9AC08~1\INTEGR~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13169~1.31\MI391D~1.EXE	medusa.exe
File opened for modification	C:\PROGRA~2\WINDOW~3\ACCESS~1\wordpad.exe	medusa.exe

Drops file in Windows directory 5 IoCs

Processes:

medusa.exesvchost.comsvhost.exe

description	ioc	process
File opened for modification	C:\Windows\svchost.com	medusa.exe
File opened for modification	C:\Windows\directx.sys	svchost.com
File opened for modification	C:\Windows\directx.sys	svhost.exe
File opened for modification	C:\Windows\svchost.com	svhost.exe
File opened for modification	C:\Windows\svchost.com	svchost.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 2 IoCs

Processes:

medusa.exesvhost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	medusa.exe
Key created	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings	svhost.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

medusa.exe

pid	process
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe
2692	medusa.exe

Suspicious use of AdjustPrivilegeToken 63 IoCs

Processes:

wmic.exewmic.exewmic.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4180	wmic.exe
Token: SeSecurityPrivilege	4180	wmic.exe
Token: SeTakeOwnershipPrivilege	4180	wmic.exe
Token: SeLoadDriverPrivilege	4180	wmic.exe
Token: SeSystemProfilePrivilege	4180	wmic.exe
Token: SeSystemtimePrivilege	4180	wmic.exe
Token: SeProfSingleProcessPrivilege	4180	wmic.exe
Token: SeIncBasePriorityPrivilege	4180	wmic.exe
Token: SeCreatePagefilePrivilege	4180	wmic.exe
Token: SeBackupPrivilege	4180	wmic.exe
Token: SeRestorePrivilege	4180	wmic.exe
Token: SeShutdownPrivilege	4180	wmic.exe
Token: SeDebugPrivilege	4180	wmic.exe
Token: SeSystemEnvironmentPrivilege	4180	wmic.exe
Token: SeRemoteShutdownPrivilege	4180	wmic.exe
Token: SeUndockPrivilege	4180	wmic.exe
Token: SeManageVolumePrivilege	4180	wmic.exe
Token: 33	4180	wmic.exe
Token: 34	4180	wmic.exe
Token: 35	4180	wmic.exe
Token: 36	4180	wmic.exe
Token: SeIncreaseQuotaPrivilege	4776	wmic.exe
Token: SeSecurityPrivilege	4776	wmic.exe
Token: SeTakeOwnershipPrivilege	4776	wmic.exe
Token: SeLoadDriverPrivilege	4776	wmic.exe
Token: SeSystemProfilePrivilege	4776	wmic.exe
Token: SeSystemtimePrivilege	4776	wmic.exe
Token: SeProfSingleProcessPrivilege	4776	wmic.exe
Token: SeIncBasePriorityPrivilege	4776	wmic.exe
Token: SeCreatePagefilePrivilege	4776	wmic.exe
Token: SeBackupPrivilege	4776	wmic.exe
Token: SeRestorePrivilege	4776	wmic.exe
Token: SeShutdownPrivilege	4776	wmic.exe
Token: SeDebugPrivilege	4776	wmic.exe
Token: SeSystemEnvironmentPrivilege	4776	wmic.exe
Token: SeRemoteShutdownPrivilege	4776	wmic.exe
Token: SeUndockPrivilege	4776	wmic.exe
Token: SeManageVolumePrivilege	4776	wmic.exe
Token: 33	4776	wmic.exe
Token: 34	4776	wmic.exe
Token: 35	4776	wmic.exe
Token: 36	4776	wmic.exe
Token: SeIncreaseQuotaPrivilege	4084	wmic.exe
Token: SeSecurityPrivilege	4084	wmic.exe
Token: SeTakeOwnershipPrivilege	4084	wmic.exe
Token: SeLoadDriverPrivilege	4084	wmic.exe
Token: SeSystemProfilePrivilege	4084	wmic.exe
Token: SeSystemtimePrivilege	4084	wmic.exe
Token: SeProfSingleProcessPrivilege	4084	wmic.exe
Token: SeIncBasePriorityPrivilege	4084	wmic.exe
Token: SeCreatePagefilePrivilege	4084	wmic.exe
Token: SeBackupPrivilege	4084	wmic.exe
Token: SeRestorePrivilege	4084	wmic.exe
Token: SeShutdownPrivilege	4084	wmic.exe
Token: SeDebugPrivilege	4084	wmic.exe
Token: SeSystemEnvironmentPrivilege	4084	wmic.exe
Token: SeRemoteShutdownPrivilege	4084	wmic.exe
Token: SeUndockPrivilege	4084	wmic.exe
Token: SeManageVolumePrivilege	4084	wmic.exe
Token: 33	4084	wmic.exe
Token: 34	4084	wmic.exe
Token: 35	4084	wmic.exe
Token: 36	4084	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

medusa.exemedusa.exesvhost.exesvchost.com

description	pid	process	target process
PID 3472 wrote to memory of 2692	3472	medusa.exe	medusa.exe
PID 3472 wrote to memory of 2692	3472	medusa.exe	medusa.exe
PID 3472 wrote to memory of 2692	3472	medusa.exe	medusa.exe
PID 2692 wrote to memory of 4180	2692	medusa.exe	wmic.exe
PID 2692 wrote to memory of 4180	2692	medusa.exe	wmic.exe
PID 2692 wrote to memory of 4180	2692	medusa.exe	wmic.exe
PID 2692 wrote to memory of 4776	2692	medusa.exe	wmic.exe
PID 2692 wrote to memory of 4776	2692	medusa.exe	wmic.exe
PID 2692 wrote to memory of 4776	2692	medusa.exe	wmic.exe
PID 2692 wrote to memory of 4084	2692	medusa.exe	wmic.exe
PID 2692 wrote to memory of 4084	2692	medusa.exe	wmic.exe
PID 2692 wrote to memory of 4084	2692	medusa.exe	wmic.exe
PID 2488 wrote to memory of 1608	2488	svhost.exe	svchost.com
PID 2488 wrote to memory of 1608	2488	svhost.exe	svchost.com
PID 2488 wrote to memory of 1608	2488	svhost.exe	svchost.com
PID 1608 wrote to memory of 2912	1608	svchost.com	svhost.exe
PID 1608 wrote to memory of 2912	1608	svchost.com	svhost.exe
PID 1608 wrote to memory of 2912	1608	svchost.com	svhost.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

Processes:

medusa.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	medusa.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	medusa.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1"	medusa.exe

C:\Users\Admin\AppData\Local\Temp\medusa.exe
"C:\Users\Admin\AppData\Local\Temp\medusa.exe"
1⤵
- Modifies system executable filetype association
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3472
- C:\Users\Admin\AppData\Local\Temp\3582-490\medusa.exe
  "C:\Users\Admin\AppData\Local\Temp\3582-490\medusa.exe"
  2⤵
  - UAC bypass
  - Executes dropped EXE
  - Modifies extensions of user files
  - Checks whether UAC is enabled
  - Drops desktop.ini file(s)
  - Enumerates connected drives
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:2692
- - C:\Windows\SysWOW64\Wbem\wmic.exe
    wmic.exe SHADOWCOPY /nointeractive
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4180
- - C:\Windows\SysWOW64\Wbem\wmic.exe
    wmic.exe SHADOWCOPY /nointeractive
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4776
- - C:\Windows\SysWOW64\Wbem\wmic.exe
    wmic.exe SHADOWCOPY /nointeractive
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4084

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
1⤵
- Executes dropped EXE
- Checks computer location settings
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\svchost.com
  "C:\Windows\svchost.com" "C:\Users\Admin\AppData\Local\Temp\3582-490\svhost.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:1608
- - C:\Users\Admin\AppData\Local\Temp\3582-490\svhost.exe
    C:\Users\Admin\AppData\Local\Temp\3582-490\svhost.exe
    3⤵
    - Executes dropped EXE
    PID:2912

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Change Default File Association

T1042

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\WindowsApps\

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\medusa.exe

Filesize
678KB

MD5
5aa0a571567f8437556e9b00ae5a3532

SHA1
45377cb152832c9112db7909219fa87a6e760aae

SHA256
73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

SHA512
d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\medusa.exe

Filesize
678KB

MD5
5aa0a571567f8437556e9b00ae5a3532

SHA1
45377cb152832c9112db7909219fa87a6e760aae

SHA256
73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

SHA512
d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\svhost.exe

Filesize
678KB

MD5
5aa0a571567f8437556e9b00ae5a3532

SHA1
45377cb152832c9112db7909219fa87a6e760aae

SHA256
73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

SHA512
d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\svhost.exe

Filesize
678KB

MD5
5aa0a571567f8437556e9b00ae5a3532

SHA1
45377cb152832c9112db7909219fa87a6e760aae

SHA256
73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

SHA512
d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp5023.tmp

Filesize
8B

MD5
51e8f712bc973cadc1ba7ae6b399e172

SHA1
afe1898cdbfbdb355d83e328b559ea3bab5ae1ae

SHA256
6e5451179dcb9065ba28165c3633a2fcfbc960c3d7683761fba82fd0113c9589

SHA512
d65b040cf34bf784709b7fef89bbdcad86dfecc134e281c201a670153569fdaba5e0e064a78373425b8433925655815a826602b46bd5278e4d6b53a313613c9e

Download Submit
C:\Users\Admin\AppData\Roaming\svhost.exe

Filesize
719KB

MD5
8474039d83805eb7b447325c3a8d1ebb

SHA1
a07d537f4253745a087709a9a07c449f84deed8d

SHA256
b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649

SHA512
3272091bbf123ba5e1592e8b2bd7740cddcb174fa158bc6980b25ee61d92387e94a25284736253f83a6eea78b427f6717e888e843db9d7759cfe9a7676576438

Download Submit
C:\Users\Admin\AppData\Roaming\svhost.exe

Filesize
719KB

MD5
8474039d83805eb7b447325c3a8d1ebb

SHA1
a07d537f4253745a087709a9a07c449f84deed8d

SHA256
b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649

SHA512
3272091bbf123ba5e1592e8b2bd7740cddcb174fa158bc6980b25ee61d92387e94a25284736253f83a6eea78b427f6717e888e843db9d7759cfe9a7676576438

Download Submit
C:\Users\Admin\AppData\Roaming\svhost.exe

Filesize
719KB

MD5
8474039d83805eb7b447325c3a8d1ebb

SHA1
a07d537f4253745a087709a9a07c449f84deed8d

SHA256
b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649

SHA512
3272091bbf123ba5e1592e8b2bd7740cddcb174fa158bc6980b25ee61d92387e94a25284736253f83a6eea78b427f6717e888e843db9d7759cfe9a7676576438

Download Submit
C:\Windows\svchost.com

Filesize
40KB

MD5
36fd5e09c417c767a952b4609d73a54b

SHA1
299399c5a2403080a5bf67fb46faec210025b36d

SHA256
980bac6c9afe8efc9c6fe459a5f77213b0d8524eb00de82437288eb96138b9a2

SHA512
1813a6a5b47a9b2cd3958cf4556714ae240f2aa19d0a241b596830f0f2b89a33ec864d00ce6a791d323a58dfbff42a0fded65eefbf980c92685e25c0ec415d92

Download Submit
C:\Windows\svchost.com

Filesize
40KB

MD5
36fd5e09c417c767a952b4609d73a54b

SHA1
299399c5a2403080a5bf67fb46faec210025b36d

SHA256
980bac6c9afe8efc9c6fe459a5f77213b0d8524eb00de82437288eb96138b9a2

SHA512
1813a6a5b47a9b2cd3958cf4556714ae240f2aa19d0a241b596830f0f2b89a33ec864d00ce6a791d323a58dfbff42a0fded65eefbf980c92685e25c0ec415d92

Download Submit
memory/1608-142-0x0000000000000000-mapping.dmp

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memory/2692-132-0x0000000000000000-mapping.dmp

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memory/2912-147-0x0000000000000000-mapping.dmp

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memory/4084-137-0x0000000000000000-mapping.dmp

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memory/4180-135-0x0000000000000000-mapping.dmp

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memory/4776-136-0x0000000000000000-mapping.dmp

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