medusalocker | 34601e5edf184f46c37314559e0a361cbce3aadc451e09f8b84020232fa710ad

Analysis

max time kernel
127s
max time network
146s
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

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

B.exe
Size

669KB
MD5

c17b2c3980926b02136c0a5fb5dfdaa3
SHA1

938eb1b7f1d985d134957443d4c43ad551727b89
SHA256

4d2b250eb1691bd116eb0004a6b4526afe62631551d6d31d4da482ab5ec3b021
SHA512

f770b1dfd74e58ff9d67f0e91ac070e92251598efc45863acf827098cc52f2868c7e2698fd5b0a3a178ea1d1446d32882dfd0601526dbfb27df1251d76c5881b
SSDEEP

12288:dQA0FfTcwpBuV2UxqDmuiLZeUaoFi2XZWfGe615HhAZV8DjKD/KeX:Tuf4wTuV2Ux3uIZeUBi2Te6HWyKrKe

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;">87169664D9D89C71B728C63CBF7F21DE47DD4EA9B5911E82E2E5A207CA48D1216E7784F065BD3E61A12D65EBE13410864138C52AD17F4FDF195931F1DB27814B<br>5DE74B5976DE4EDDCB695C059A807744F72947D643322387658D193B054EE40CCD9828FF11A86C581A336181F21949CB7089D92C3F2CEF8C6668F42B7B9C<br>575CFE0B4B4015E10B4AEE38C7F9525FE4C9058ADFD283F67D0523226A88853F0C70C4B5470EB1EF7A1509A2D6A5738F0BA2D066022027B5F8DEC3BD49D3<br>DBB64B20F8BE71521204065AC8807CBA67AF8A5C288CBBEDD4C160FE469A1AB8BD7338C26F060CC03E5A4E3381ACDBD8EEFF075870E68C6C1646A3ADBFB7<br>18DCB6E803202FCEF1DE53DF94354DA4DC14553106B97049F5550F75A13204BCEBE7FE05CE3D8E5B17A27C6C59E27124F6DC97E956BC6293B99642367A43<br>0AD91A7F6E405B68BF65A9797334B07F7C25FE723A648178E02D6464C43B3300764E4F91EEDA6FE923EC29BF44CF885CA979599204181E7A736EB1006502<br>AA61FC3C626B6739327F6A35456E64FAD5B2CB5AFB8AF012D4F906EF5619933471DF7771F8A7F4EB6E8034D5D6946A52F70DCACBCFE684400A5EDABA9515<br>4666BAB81A3293228A6FE5D2FAD377BE86C9F6B83179FE518AADED33C2EC866106C47864F133D2CD87C9D5BCEA517CE1395495E82372FB35D541678522A4<br>24B4D3F019B160BD72A0E0013C2E</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
behavioral2/files/0x000b000000023b6d-647.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"	B.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	B.exe

Renames multiple (208) 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
2216	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"	B.exe

Drops desktop.ini file(s) 1 IoCs

description	ioc	Process
File opened for modification	\??\Z:\$RECYCLE.BIN\S-1-5-21-2437139445-1151884604-3026847218-1000\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

description	ioc	Process
File opened (read-only)	\??\H:	B.exe
File opened (read-only)	\??\I:	B.exe
File opened (read-only)	\??\L:	B.exe
File opened (read-only)	\??\P:	B.exe
File opened (read-only)	\??\W:	B.exe
File opened (read-only)	\??\B:	B.exe
File opened (read-only)	\??\G:	B.exe
File opened (read-only)	\??\N:	B.exe
File opened (read-only)	\??\T:	B.exe
File opened (read-only)	\??\X:	B.exe
File opened (read-only)	\??\Z:	B.exe
File opened (read-only)	\??\J:	B.exe
File opened (read-only)	\??\K:	B.exe
File opened (read-only)	\??\O:	B.exe
File opened (read-only)	\??\Q:	B.exe
File opened (read-only)	\??\U:	B.exe
File opened (read-only)	\??\V:	B.exe
File opened (read-only)	\??\A:	B.exe
File opened (read-only)	\??\E:	B.exe
File opened (read-only)	\??\S:	B.exe
File opened (read-only)	\??\Y:	B.exe
File opened (read-only)	\??\F:	B.exe
File opened (read-only)	\??\M:	B.exe
File opened (read-only)	\??\R:	B.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	svhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	B.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmic.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe
3108	B.exe

Suspicious use of AdjustPrivilegeToken 63 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4316	wmic.exe
Token: SeSecurityPrivilege	4316	wmic.exe
Token: SeTakeOwnershipPrivilege	4316	wmic.exe
Token: SeLoadDriverPrivilege	4316	wmic.exe
Token: SeSystemProfilePrivilege	4316	wmic.exe
Token: SeSystemtimePrivilege	4316	wmic.exe
Token: SeProfSingleProcessPrivilege	4316	wmic.exe
Token: SeIncBasePriorityPrivilege	4316	wmic.exe
Token: SeCreatePagefilePrivilege	4316	wmic.exe
Token: SeBackupPrivilege	4316	wmic.exe
Token: SeRestorePrivilege	4316	wmic.exe
Token: SeShutdownPrivilege	4316	wmic.exe
Token: SeDebugPrivilege	4316	wmic.exe
Token: SeSystemEnvironmentPrivilege	4316	wmic.exe
Token: SeRemoteShutdownPrivilege	4316	wmic.exe
Token: SeUndockPrivilege	4316	wmic.exe
Token: SeManageVolumePrivilege	4316	wmic.exe
Token: 33	4316	wmic.exe
Token: 34	4316	wmic.exe
Token: 35	4316	wmic.exe
Token: 36	4316	wmic.exe
Token: SeIncreaseQuotaPrivilege	964	wmic.exe
Token: SeSecurityPrivilege	964	wmic.exe
Token: SeTakeOwnershipPrivilege	964	wmic.exe
Token: SeLoadDriverPrivilege	964	wmic.exe
Token: SeSystemProfilePrivilege	964	wmic.exe
Token: SeSystemtimePrivilege	964	wmic.exe
Token: SeProfSingleProcessPrivilege	964	wmic.exe
Token: SeIncBasePriorityPrivilege	964	wmic.exe
Token: SeCreatePagefilePrivilege	964	wmic.exe
Token: SeBackupPrivilege	964	wmic.exe
Token: SeRestorePrivilege	964	wmic.exe
Token: SeShutdownPrivilege	964	wmic.exe
Token: SeDebugPrivilege	964	wmic.exe
Token: SeSystemEnvironmentPrivilege	964	wmic.exe
Token: SeRemoteShutdownPrivilege	964	wmic.exe
Token: SeUndockPrivilege	964	wmic.exe
Token: SeManageVolumePrivilege	964	wmic.exe
Token: 33	964	wmic.exe
Token: 34	964	wmic.exe
Token: 35	964	wmic.exe
Token: 36	964	wmic.exe
Token: SeIncreaseQuotaPrivilege	2416	wmic.exe
Token: SeSecurityPrivilege	2416	wmic.exe
Token: SeTakeOwnershipPrivilege	2416	wmic.exe
Token: SeLoadDriverPrivilege	2416	wmic.exe
Token: SeSystemProfilePrivilege	2416	wmic.exe
Token: SeSystemtimePrivilege	2416	wmic.exe
Token: SeProfSingleProcessPrivilege	2416	wmic.exe
Token: SeIncBasePriorityPrivilege	2416	wmic.exe
Token: SeCreatePagefilePrivilege	2416	wmic.exe
Token: SeBackupPrivilege	2416	wmic.exe
Token: SeRestorePrivilege	2416	wmic.exe
Token: SeShutdownPrivilege	2416	wmic.exe
Token: SeDebugPrivilege	2416	wmic.exe
Token: SeSystemEnvironmentPrivilege	2416	wmic.exe
Token: SeRemoteShutdownPrivilege	2416	wmic.exe
Token: SeUndockPrivilege	2416	wmic.exe
Token: SeManageVolumePrivilege	2416	wmic.exe
Token: 33	2416	wmic.exe
Token: 34	2416	wmic.exe
Token: 35	2416	wmic.exe
Token: 36	2416	wmic.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3108 wrote to memory of 4316	3108	B.exe	84
PID 3108 wrote to memory of 4316	3108	B.exe	84
PID 3108 wrote to memory of 4316	3108	B.exe	84
PID 3108 wrote to memory of 964	3108	B.exe	87
PID 3108 wrote to memory of 964	3108	B.exe	87
PID 3108 wrote to memory of 964	3108	B.exe	87
PID 3108 wrote to memory of 2416	3108	B.exe	89
PID 3108 wrote to memory of 2416	3108	B.exe	89
PID 3108 wrote to memory of 2416	3108	B.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"	B.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	B.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1"	B.exe

C:\Users\Admin\AppData\Local\Temp\B.exe
"C:\Users\Admin\AppData\Local\Temp\B.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:3108
- C:\Windows\SysWOW64\Wbem\wmic.exe
  wmic.exe SHADOWCOPY /nointeractive
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4316
- C:\Windows\SysWOW64\Wbem\wmic.exe
  wmic.exe SHADOWCOPY /nointeractive
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:964
- C:\Windows\SysWOW64\Wbem\wmic.exe
  wmic.exe SHADOWCOPY /nointeractive
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2416

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:2216

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
669KB

MD5
c17b2c3980926b02136c0a5fb5dfdaa3

SHA1
938eb1b7f1d985d134957443d4c43ad551727b89

SHA256
4d2b250eb1691bd116eb0004a6b4526afe62631551d6d31d4da482ab5ec3b021

SHA512
f770b1dfd74e58ff9d67f0e91ac070e92251598efc45863acf827098cc52f2868c7e2698fd5b0a3a178ea1d1446d32882dfd0601526dbfb27df1251d76c5881b

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

Filesize
536B

MD5
85df9887927d2d151db8e7a923f3b869

SHA1
13ce7e58df6bb7f3101370e69fd1fa1171514024

SHA256
6ac37d81b7143257f281d0cff0affae618ac616f22a0d8d1c935b16ebdd23222

SHA512
a57807e26083fefe9aa7b53ddb8733eb279bb530dbc41ff3058f0c7867286dd6e6cb192b5bcbd53d4bb176613385841b1b4b1b34d95692d15d9aaf691124bde8

Download Submit
\Device\HarddiskVolume1\HOW_TO_RECOVER_DATA.html

Filesize
5KB

MD5
5d9615833790f36b52f894638bd88c21

SHA1
f22dfa318c8b53cee29bef7691a8d00cdac035bd

SHA256
dd238ca0cc9ff01d4a3ce05dff704ab20d1784d6890af533d790d89760fddd6a

SHA512
7f9d8a96b5ead10ef3647c463e7c9124f75238fbe2301a39acc932c9d59e546557b75e56763ec8164dffc07b4332171dd3f7e412968666a640b9786e4f5c029f

Download Submit