medusalocker | 34601e5edf184f46c37314559e0a361cbce3aadc451e09f8b84020232fa710ad

General

Target

B.exe
Size

669KB
MD5

c17b2c3980926b02136c0a5fb5dfdaa3
SHA1

938eb1b7f1d985d134957443d4c43ad551727b89
SHA256

4d2b250eb1691bd116eb0004a6b4526afe62631551d6d31d4da482ab5ec3b021
SHA512

f770b1dfd74e58ff9d67f0e91ac070e92251598efc45863acf827098cc52f2868c7e2698fd5b0a3a178ea1d1446d32882dfd0601526dbfb27df1251d76c5881b

Score

10^/10

medusalocker evasion ransomware spyware stealer trojan

Malware Config

Extracted

Path

C:\Boot\HOW_TO_RECOVER_DATA.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;">6567B43AA1D1B9C404182703C02CEEAFCB92F29FAC6A173FFE4C1ABFDCC6CFCD3B800650084195DEACBCE2AFC07878104F6F36BAC36E308DB4418A42CBB5D14F<br>511E43A35E0A7CC8815D2B0FF3510A97627A30CD3EDB72E541EA9EDB839068E7FA350F0312BD720BD25CFF8C4D5069D6276394ABA61196B1678AF3FBA52E<br>CB049803C28857092FCC26CA9438B3E436126C57E8F67EDFB946F5F4CF70434CD7B1732E65E8A49E9DCE9A1635D94B788FD951F6D2DA8429FEF329FE5435<br>BF4467CC007E23BEF3BAF77BC4CFAC21677FC0F31547FDD63D305D976A1030EFED32556180319371FF2350A3199FE8813AAF79B1E4B302AF9E730530A09A<br>04D108510938AB5BC129FC05926378A6C41C531A8CE692E6D388B1A84A95615A935E806176A935C76F416BDF83BFA08EEF1DA694C8896694B1F8CA08BCB4<br>FCA38CD75166DC6BE260BC9AF5939959BBDB35135D42B56DCF3651B949612077FB67F4C03B64B742243F56D6DB6FA212DA26DAE2528C0C7C8BAD0654D2B7<br>419F80ACA4A9CD6A416E45F9C7F6A5F5B48CF73AE6C87B6DA19F6423757E4817211572E61993554CC5B4A08DD318DAFAFE9A3EBCE7067D9134D26194D35F<br>426817123C1D37A6FA08ECF2F68A86E34615E5D93385F9AF18AE44E0CDB1CB0E45E1CE4F94399828AB7F9905AAEB1F4D2B801986137107BFCDFD68AAAF7B<br>A0438CCBD7A36C08E521996F6BAD</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>.onion</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 <a>.onion </a><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="behappy123456@cock.li ">behappy123456@cock.li </a> <br><a href="chinchoppa2299gayspilsss@yopmail.com">chinchoppa2299gayspilsss@yopmail.com</a> <br> <b>* To contact us, create a new free email account on the site:</b> <a href="https://protonmail.com">protonmail.com<br> <hr> <b> 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="behappy123456@cock.li

">behappy123456@cock.li

href="chinchoppa2299gayspilsss@yopmail.com">chinchoppa2299gayspilsss@yopmail.com</a>

Signatures

MedusaLocker
Ransomware with several variants first seen in September 2019.
ransomware medusalocker
UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Modifies extensions of user files 14 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

B.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\ClearSuspend.raw => C:\Users\Admin\Pictures\ClearSuspend.raw.bbuild	B.exe
File renamed	C:\Users\Admin\Pictures\EnableConfirm.tiff => C:\Users\Admin\Pictures\EnableConfirm.tiff.bbuild	B.exe
File renamed	C:\Users\Admin\Pictures\ExpandSave.crw => C:\Users\Admin\Pictures\ExpandSave.crw.bbuild	B.exe
File renamed	C:\Users\Admin\Pictures\GrantJoin.png => C:\Users\Admin\Pictures\GrantJoin.png.bbuild	B.exe
File opened for modification	C:\Users\Admin\Pictures\ExportExpand.tiff	B.exe
File renamed	C:\Users\Admin\Pictures\InitializeLimit.raw => C:\Users\Admin\Pictures\InitializeLimit.raw.bbuild	B.exe
File renamed	C:\Users\Admin\Pictures\NewHide.crw => C:\Users\Admin\Pictures\NewHide.crw.bbuild	B.exe
File renamed	C:\Users\Admin\Pictures\SaveDeny.png => C:\Users\Admin\Pictures\SaveDeny.png.bbuild	B.exe
File renamed	C:\Users\Admin\Pictures\UnprotectUpdate.raw => C:\Users\Admin\Pictures\UnprotectUpdate.raw.bbuild	B.exe
File renamed	C:\Users\Admin\Pictures\InvokeUndo.crw => C:\Users\Admin\Pictures\InvokeUndo.crw.bbuild	B.exe
File renamed	C:\Users\Admin\Pictures\PingFind.tif => C:\Users\Admin\Pictures\PingFind.tif.bbuild	B.exe
File opened for modification	C:\Users\Admin\Pictures\EnableConfirm.tiff	B.exe
File renamed	C:\Users\Admin\Pictures\ExportExpand.tiff => C:\Users\Admin\Pictures\ExportExpand.tiff.bbuild	B.exe
File renamed	C:\Users\Admin\Pictures\ProtectLimit.raw => C:\Users\Admin\Pictures\ProtectLimit.raw.bbuild	B.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:

B.exe

description ioc process

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

Processes:

B.exe

description ioc process

File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-2481030822-2828258191-1606198294-1000\desktop.ini B.exe

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

description	ioc	process
File opened for modification	\??\Z:\$RECYCLE.BIN\S-1-5-21-2481030822-2828258191-1606198294-1000\desktop.ini	B.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:

B.exe

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

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

System Information Discovery
T1082
Interacts with shadow copies 2 TTPs 3 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Processes:

vssadmin.exevssadmin.exevssadmin.exe

pid process

3260 vssadmin.exe
1524 vssadmin.exe
1288 vssadmin.exe

pid	process
3260	vssadmin.exe
1524	vssadmin.exe
1288	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

B.exe

pid	process
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe
1812	B.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

vssvc.exewmic.exewmic.exewmic.exe

description	pid	process
Token: SeBackupPrivilege	1492	vssvc.exe
Token: SeRestorePrivilege	1492	vssvc.exe
Token: SeAuditPrivilege	1492	vssvc.exe
Token: SeIncreaseQuotaPrivilege	772	wmic.exe
Token: SeSecurityPrivilege	772	wmic.exe
Token: SeTakeOwnershipPrivilege	772	wmic.exe
Token: SeLoadDriverPrivilege	772	wmic.exe
Token: SeSystemProfilePrivilege	772	wmic.exe
Token: SeSystemtimePrivilege	772	wmic.exe
Token: SeProfSingleProcessPrivilege	772	wmic.exe
Token: SeIncBasePriorityPrivilege	772	wmic.exe
Token: SeCreatePagefilePrivilege	772	wmic.exe
Token: SeBackupPrivilege	772	wmic.exe
Token: SeRestorePrivilege	772	wmic.exe
Token: SeShutdownPrivilege	772	wmic.exe
Token: SeDebugPrivilege	772	wmic.exe
Token: SeSystemEnvironmentPrivilege	772	wmic.exe
Token: SeRemoteShutdownPrivilege	772	wmic.exe
Token: SeUndockPrivilege	772	wmic.exe
Token: SeManageVolumePrivilege	772	wmic.exe
Token: 33	772	wmic.exe
Token: 34	772	wmic.exe
Token: 35	772	wmic.exe
Token: 36	772	wmic.exe
Token: SeIncreaseQuotaPrivilege	604	wmic.exe
Token: SeSecurityPrivilege	604	wmic.exe
Token: SeTakeOwnershipPrivilege	604	wmic.exe
Token: SeLoadDriverPrivilege	604	wmic.exe
Token: SeSystemProfilePrivilege	604	wmic.exe
Token: SeSystemtimePrivilege	604	wmic.exe
Token: SeProfSingleProcessPrivilege	604	wmic.exe
Token: SeIncBasePriorityPrivilege	604	wmic.exe
Token: SeCreatePagefilePrivilege	604	wmic.exe
Token: SeBackupPrivilege	604	wmic.exe
Token: SeRestorePrivilege	604	wmic.exe
Token: SeShutdownPrivilege	604	wmic.exe
Token: SeDebugPrivilege	604	wmic.exe
Token: SeSystemEnvironmentPrivilege	604	wmic.exe
Token: SeRemoteShutdownPrivilege	604	wmic.exe
Token: SeUndockPrivilege	604	wmic.exe
Token: SeManageVolumePrivilege	604	wmic.exe
Token: 33	604	wmic.exe
Token: 34	604	wmic.exe
Token: 35	604	wmic.exe
Token: 36	604	wmic.exe
Token: SeIncreaseQuotaPrivilege	1008	wmic.exe
Token: SeSecurityPrivilege	1008	wmic.exe
Token: SeTakeOwnershipPrivilege	1008	wmic.exe
Token: SeLoadDriverPrivilege	1008	wmic.exe
Token: SeSystemProfilePrivilege	1008	wmic.exe
Token: SeSystemtimePrivilege	1008	wmic.exe
Token: SeProfSingleProcessPrivilege	1008	wmic.exe
Token: SeIncBasePriorityPrivilege	1008	wmic.exe
Token: SeCreatePagefilePrivilege	1008	wmic.exe
Token: SeBackupPrivilege	1008	wmic.exe
Token: SeRestorePrivilege	1008	wmic.exe
Token: SeShutdownPrivilege	1008	wmic.exe
Token: SeDebugPrivilege	1008	wmic.exe
Token: SeSystemEnvironmentPrivilege	1008	wmic.exe
Token: SeRemoteShutdownPrivilege	1008	wmic.exe
Token: SeUndockPrivilege	1008	wmic.exe
Token: SeManageVolumePrivilege	1008	wmic.exe
Token: 33	1008	wmic.exe
Token: 34	1008	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

B.exe

description	pid	process	target process
PID 1812 wrote to memory of 3260	1812	B.exe	vssadmin.exe
PID 1812 wrote to memory of 3260	1812	B.exe	vssadmin.exe
PID 1812 wrote to memory of 3260	1812	B.exe	vssadmin.exe
PID 1812 wrote to memory of 772	1812	B.exe	wmic.exe
PID 1812 wrote to memory of 772	1812	B.exe	wmic.exe
PID 1812 wrote to memory of 772	1812	B.exe	wmic.exe
PID 1812 wrote to memory of 1524	1812	B.exe	vssadmin.exe
PID 1812 wrote to memory of 1524	1812	B.exe	vssadmin.exe
PID 1812 wrote to memory of 1524	1812	B.exe	vssadmin.exe
PID 1812 wrote to memory of 604	1812	B.exe	wmic.exe
PID 1812 wrote to memory of 604	1812	B.exe	wmic.exe
PID 1812 wrote to memory of 604	1812	B.exe	wmic.exe
PID 1812 wrote to memory of 1288	1812	B.exe	vssadmin.exe
PID 1812 wrote to memory of 1288	1812	B.exe	vssadmin.exe
PID 1812 wrote to memory of 1288	1812	B.exe	vssadmin.exe
PID 1812 wrote to memory of 1008	1812	B.exe	wmic.exe
PID 1812 wrote to memory of 1008	1812	B.exe	wmic.exe
PID 1812 wrote to memory of 1008	1812	B.exe	wmic.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

Processes:

B.exe

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

C:\Users\Admin\AppData\Local\Temp\B.exe
"C:\Users\Admin\AppData\Local\Temp\B.exe"
1⤵
- 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:1812