medusalocker | 34601e5edf184f46c37314559e0a361cbce3aadc451e09f8b84020232fa710ad

Analysis

max time kernel
127s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24-12-2024 13:15

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General

Target

READ.exe
Size

669KB
MD5

5ec29d96f5fefb2d726f9e120786eaa9
SHA1

3f8d050bd4e823b1f2c681856d1ae6d9007d5861
SHA256

8ee1f51602f957fa82c7e9c0d834d28873307a0c576ab8c7cc99ca85fcf43b2e
SHA512

e21682f2bfee29cd0c0765a10463b2f57bde5996fa367ee2b8b6f7fae9bf5703aec24319ddf2e33890b352331f8fedda41d79ff04ec8a881a6469f6bdba0d5ff
SSDEEP

12288:dQA0FfTcwpBuV2UxqDmuiLZeUaoFi2XZWfGe615HhAZV8DaKD/KeX:Tuf4wTuV2Ux3uIZeUBi2Te6HWPKrKe

Score

10^/10

medusalocker discovery evasion ransomware spyware stealer trojan

Malware Config

Extracted

Path

\Device\HarddiskVolume1\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;">107178C5D51A337148646C45D061AB3BB51C9E44D215CD7B57F465D1516ADEA43B79BC668B63EAED835D8403B46DC9ED843DEF7E8E2BB2DCF24B365B9C39AF19<br>C43EBC271A3F44B653FBC2FD45BD5B1E40F0B3B7F1D75080AC410043B5579DF8BB52EFD8D1B2A308ACBB93F1FB5AFC374B1745FEE4E24DC456BABC829C6A<br>C3969A1835593310BC0F05F570E36002ECF7604A81F6F45CA49C355172B0A6C101DC645FC18F4A1A68A896CD29661EB7E70A439E3628EBC99B114084809D<br>EC6F69859B5BE938976119D8867A9A2CF3BE48448E4070072A7648A8480FB37E0F7773CF3F8FD7BFBD1F7AD21DD2BE85074DEE603B166EBD3C611655BE14<br>DE2C68622F15C15CF77FE23B2DA838A6C4562937989F3B7EC0643664E085250D3601070766A298CF1A36923D8E41F9A1B073CD6FAF1FA0981CDBAF463EB9<br>AA4992D630BB67DCDB072AA75CE0A5EAE6C9630F5A7B7EFE5CBA9918A9A3A084CAFD671A116EA82D6F8253922DFCB8E54268E5EF76E756958E72C7ECC618<br>68079F9520BB302E3E8813DC1D2DF8F49041BDD39233523234B4ED59BD5FEDA925A5F422851A24D7144226C31FC3F5C97F19ECCB150A70F01FA65D7542C8<br>749EA38B4F7AF74425FEBB1B1FE1AE78A430FDA2F6DF7A3F1DB4D85497C00F2BB464D37E68402ED2101348F3F4CAECBC0E7470EC493ADA36624491A4F89D<br>5B8EA296216EE1B1338A9B353A7C</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="[email protected] ">[email protected] </a> <br><a href="[email protected]">[email protected]</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="[email protected]

">[email protected]

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

Signatures

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

MedusaLocker payload 1 IoCs

resource	yara_rule
behavioral6/files/0x000500000002309e-656.dat	family_medusalocker

Medusalocker family
medusalocker

UAC bypass 3 TTPs 2 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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

Renames multiple (211) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Executes dropped EXE 1 IoCs

pid	Process
3056	svhost.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

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

Drops desktop.ini file(s) 1 IoCs

description	ioc	Process
File opened for modification	\??\Z:\$RECYCLE.BIN\S-1-5-21-2045521122-590294423-3465680274-1000\desktop.ini	READ.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

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

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	READ.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe
856	READ.exe

Suspicious use of AdjustPrivilegeToken 63 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4808	wmic.exe
Token: SeSecurityPrivilege	4808	wmic.exe
Token: SeTakeOwnershipPrivilege	4808	wmic.exe
Token: SeLoadDriverPrivilege	4808	wmic.exe
Token: SeSystemProfilePrivilege	4808	wmic.exe
Token: SeSystemtimePrivilege	4808	wmic.exe
Token: SeProfSingleProcessPrivilege	4808	wmic.exe
Token: SeIncBasePriorityPrivilege	4808	wmic.exe
Token: SeCreatePagefilePrivilege	4808	wmic.exe
Token: SeBackupPrivilege	4808	wmic.exe
Token: SeRestorePrivilege	4808	wmic.exe
Token: SeShutdownPrivilege	4808	wmic.exe
Token: SeDebugPrivilege	4808	wmic.exe
Token: SeSystemEnvironmentPrivilege	4808	wmic.exe
Token: SeRemoteShutdownPrivilege	4808	wmic.exe
Token: SeUndockPrivilege	4808	wmic.exe
Token: SeManageVolumePrivilege	4808	wmic.exe
Token: 33	4808	wmic.exe
Token: 34	4808	wmic.exe
Token: 35	4808	wmic.exe
Token: 36	4808	wmic.exe
Token: SeIncreaseQuotaPrivilege	2388	wmic.exe
Token: SeSecurityPrivilege	2388	wmic.exe
Token: SeTakeOwnershipPrivilege	2388	wmic.exe
Token: SeLoadDriverPrivilege	2388	wmic.exe
Token: SeSystemProfilePrivilege	2388	wmic.exe
Token: SeSystemtimePrivilege	2388	wmic.exe
Token: SeProfSingleProcessPrivilege	2388	wmic.exe
Token: SeIncBasePriorityPrivilege	2388	wmic.exe
Token: SeCreatePagefilePrivilege	2388	wmic.exe
Token: SeBackupPrivilege	2388	wmic.exe
Token: SeRestorePrivilege	2388	wmic.exe
Token: SeShutdownPrivilege	2388	wmic.exe
Token: SeDebugPrivilege	2388	wmic.exe
Token: SeSystemEnvironmentPrivilege	2388	wmic.exe
Token: SeRemoteShutdownPrivilege	2388	wmic.exe
Token: SeUndockPrivilege	2388	wmic.exe
Token: SeManageVolumePrivilege	2388	wmic.exe
Token: 33	2388	wmic.exe
Token: 34	2388	wmic.exe
Token: 35	2388	wmic.exe
Token: 36	2388	wmic.exe
Token: SeIncreaseQuotaPrivilege	404	wmic.exe
Token: SeSecurityPrivilege	404	wmic.exe
Token: SeTakeOwnershipPrivilege	404	wmic.exe
Token: SeLoadDriverPrivilege	404	wmic.exe
Token: SeSystemProfilePrivilege	404	wmic.exe
Token: SeSystemtimePrivilege	404	wmic.exe
Token: SeProfSingleProcessPrivilege	404	wmic.exe
Token: SeIncBasePriorityPrivilege	404	wmic.exe
Token: SeCreatePagefilePrivilege	404	wmic.exe
Token: SeBackupPrivilege	404	wmic.exe
Token: SeRestorePrivilege	404	wmic.exe
Token: SeShutdownPrivilege	404	wmic.exe
Token: SeDebugPrivilege	404	wmic.exe
Token: SeSystemEnvironmentPrivilege	404	wmic.exe
Token: SeRemoteShutdownPrivilege	404	wmic.exe
Token: SeUndockPrivilege	404	wmic.exe
Token: SeManageVolumePrivilege	404	wmic.exe
Token: 33	404	wmic.exe
Token: 34	404	wmic.exe
Token: 35	404	wmic.exe
Token: 36	404	wmic.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 856 wrote to memory of 4808	856	READ.exe	84
PID 856 wrote to memory of 4808	856	READ.exe	84
PID 856 wrote to memory of 4808	856	READ.exe	84
PID 856 wrote to memory of 2388	856	READ.exe	87
PID 856 wrote to memory of 2388	856	READ.exe	87
PID 856 wrote to memory of 2388	856	READ.exe	87
PID 856 wrote to memory of 404	856	READ.exe	89
PID 856 wrote to memory of 404	856	READ.exe	89
PID 856 wrote to memory of 404	856	READ.exe	89

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

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

C:\Users\Admin\AppData\Local\Temp\READ.exe
"C:\Users\Admin\AppData\Local\Temp\READ.exe"
1⤵
- UAC bypass
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- System policy modification
PID:856
- C:\Windows\SysWOW64\Wbem\wmic.exe
  wmic.exe SHADOWCOPY /nointeractive
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4808
- C:\Windows\SysWOW64\Wbem\wmic.exe
  wmic.exe SHADOWCOPY /nointeractive
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2388
- C:\Windows\SysWOW64\Wbem\wmic.exe
  wmic.exe SHADOWCOPY /nointeractive
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:404

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
669KB

MD5
5ec29d96f5fefb2d726f9e120786eaa9

SHA1
3f8d050bd4e823b1f2c681856d1ae6d9007d5861

SHA256
8ee1f51602f957fa82c7e9c0d834d28873307a0c576ab8c7cc99ca85fcf43b2e

SHA512
e21682f2bfee29cd0c0765a10463b2f57bde5996fa367ee2b8b6f7fae9bf5703aec24319ddf2e33890b352331f8fedda41d79ff04ec8a881a6469f6bdba0d5ff

Download Submit
C:\Users\Default\ntuser.dat.LOG2

Filesize
536B

MD5
cc7c5208f9903d9492f411396c9854c4

SHA1
1facdfc1093aa4233b45fb5b2194e20f2fefa449

SHA256
2a0a612271ea99db167f5136500485db0e7e88973fe7c0fcb6645ee863072d1d

SHA512
63c5030d681b9bf9668003db4be72bfe63b96aa18f2ce424bca2c0f14df81ddf72eacc22efbdebf551e72cc13474117fcb0c3df54991e06b8f8bc3489c23a756

Download Submit
\Device\HarddiskVolume1\HOW_TO_RECOVER_DATA.html

Filesize
5KB

MD5
f60eb90020f916d8c4b53b640b819456

SHA1
62397c837f10f0a244aa8ade17cd517759e05cee

SHA256
924329a440cb16662d3a53fd4db18605e26db9490b6afefcbe3fb1aede121ed6

SHA512
2a5fdddfe8579458255e3046b35feabc9bf6671b84b3ecb1ad2d4eada19b1b88d1a7a46ce1fe9b7e71cc1b91506c9c8b04927932bf6330b60c6e30d8dfc2b821

Download Submit