medusalocker | 34601e5edf184f46c37314559e0a361cbce3aadc451e09f8b84020232fa710ad

General

Target

READ.exe
Size

669KB
MD5

5ec29d96f5fefb2d726f9e120786eaa9
SHA1

3f8d050bd4e823b1f2c681856d1ae6d9007d5861
SHA256

8ee1f51602f957fa82c7e9c0d834d28873307a0c576ab8c7cc99ca85fcf43b2e
SHA512

e21682f2bfee29cd0c0765a10463b2f57bde5996fa367ee2b8b6f7fae9bf5703aec24319ddf2e33890b352331f8fedda41d79ff04ec8a881a6469f6bdba0d5ff

Score

10^/10

medusalocker evasion ransomware spyware stealer trojan

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\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;">D00BA3395A922D020FCF84623D8CB91AFCA649C03D9065AB8C2F40B517B65076513D0B5C6FD13013BFDFB93BF41EE8CCD89C33287A0A0D25C489E265A7E148D7<br>B747AF881231E28150CD874478F3822341EDAF0DBE4E8B9330C547434E7156BC94169317A7441A34ADBDBFDAD2F110AD6F0D5F83AC8A8CA38C3AC889D8D1<br>476C44F2A1F31AD5F113D010E60A0D7174CDEF0A9007BAFA57E2C2CED3EA07F86EE72315B4748349F1FE2B426D84967AECDBE99A1B496DE1B0ACE0E29093<br>A403AA03111AC0A4B6CC5926BD5FFDEF2B59B37E652109CEAB763FAC97EB21EFF7440017FF742BF7A5C879125A2A745B4A6DDA58F71C61F73677237E2C04<br>C60176705E255FEA9D41753E662688FF119E275A5509DA657AA2EDAB12CE3B0A3888624CB4FF39523DEC31BC64ACEC91A660F0D30FF9AE32DB67CDBA836B<br>F435979875B076A9B0B75A3AFFFE1CE786658016B7DD29FD92BAD9D24A0F97FD357B506DC0577A54DD2397762C172B5A90290F5F0DC08DBB8571BAEACE50<br>1450EEA8ECBFEE8E86CAEA0026F4247935190CEB4CE7019C1DF14C214684885808B5866A6D1ACA7AF9FDB620DE585A162CE2989FFED323754F94548E44FB<br>D454893501DF0489CEFF090262EC4295035C561E5A586B51F2E9A2771D6BB5FDB604655BB4CD83FF59539A784DEC4970BE319F4ED2F841E9EAEA6D6F0FA3<br>0BD49EB3A0DB80DA7E9806425C2A</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="coleman.dec@tutanota.com ">coleman.dec@tutanota.com </a> <br><a href="lauracc@msgsafe.io">lauracc@msgsafe.io</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="coleman.dec@tutanota.com

">coleman.dec@tutanota.com

href="lauracc@msgsafe.io">lauracc@msgsafe.io</a>

Signatures

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

MedusaLocker Payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\svhost.exe	family_medusalocker
C:\Users\Admin\AppData\Roaming\svhost.exe	family_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
Executes dropped EXE 1 IoCs

Processes:

svhost.exe

pid process

1496 svhost.exe

pid	process
1496	svhost.exe

Modifies extensions of user files 5 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

READ.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\NewWrite.tiff	READ.exe
File renamed	C:\Users\Admin\Pictures\NewWrite.tiff => C:\Users\Admin\Pictures\NewWrite.tiff.read	READ.exe
File renamed	C:\Users\Admin\Pictures\OpenRead.raw => C:\Users\Admin\Pictures\OpenRead.raw.read	READ.exe
File renamed	C:\Users\Admin\Pictures\ResumeUninstall.png => C:\Users\Admin\Pictures\ResumeUninstall.png.read	READ.exe
File renamed	C:\Users\Admin\Pictures\UndoProtect.raw => C:\Users\Admin\Pictures\UndoProtect.raw.read	READ.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:

READ.exe

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

Processes:

READ.exe

description ioc process

File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-2955169046-2371869340-1800780948-1000\desktop.ini READ.exe

description	ioc	process
File opened for modification	\??\Z:\$RECYCLE.BIN\S-1-5-21-2955169046-2371869340-1800780948-1000\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

Processes:

READ.exe

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

428 vssadmin.exe
1696 vssadmin.exe
592 vssadmin.exe

pid	process
428	vssadmin.exe
1696	vssadmin.exe
592	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

READ.exe

pid	process
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe
1572	READ.exe

Suspicious use of AdjustPrivilegeToken 63 IoCs

Processes:

vssvc.exewmic.exewmic.exewmic.exe

description	pid	process
Token: SeBackupPrivilege	1588	vssvc.exe
Token: SeRestorePrivilege	1588	vssvc.exe
Token: SeAuditPrivilege	1588	vssvc.exe
Token: SeIncreaseQuotaPrivilege	328	wmic.exe
Token: SeSecurityPrivilege	328	wmic.exe
Token: SeTakeOwnershipPrivilege	328	wmic.exe
Token: SeLoadDriverPrivilege	328	wmic.exe
Token: SeSystemProfilePrivilege	328	wmic.exe
Token: SeSystemtimePrivilege	328	wmic.exe
Token: SeProfSingleProcessPrivilege	328	wmic.exe
Token: SeIncBasePriorityPrivilege	328	wmic.exe
Token: SeCreatePagefilePrivilege	328	wmic.exe
Token: SeBackupPrivilege	328	wmic.exe
Token: SeRestorePrivilege	328	wmic.exe
Token: SeShutdownPrivilege	328	wmic.exe
Token: SeDebugPrivilege	328	wmic.exe
Token: SeSystemEnvironmentPrivilege	328	wmic.exe
Token: SeRemoteShutdownPrivilege	328	wmic.exe
Token: SeUndockPrivilege	328	wmic.exe
Token: SeManageVolumePrivilege	328	wmic.exe
Token: 33	328	wmic.exe
Token: 34	328	wmic.exe
Token: 35	328	wmic.exe
Token: SeIncreaseQuotaPrivilege	1112	wmic.exe
Token: SeSecurityPrivilege	1112	wmic.exe
Token: SeTakeOwnershipPrivilege	1112	wmic.exe
Token: SeLoadDriverPrivilege	1112	wmic.exe
Token: SeSystemProfilePrivilege	1112	wmic.exe
Token: SeSystemtimePrivilege	1112	wmic.exe
Token: SeProfSingleProcessPrivilege	1112	wmic.exe
Token: SeIncBasePriorityPrivilege	1112	wmic.exe
Token: SeCreatePagefilePrivilege	1112	wmic.exe
Token: SeBackupPrivilege	1112	wmic.exe
Token: SeRestorePrivilege	1112	wmic.exe
Token: SeShutdownPrivilege	1112	wmic.exe
Token: SeDebugPrivilege	1112	wmic.exe
Token: SeSystemEnvironmentPrivilege	1112	wmic.exe
Token: SeRemoteShutdownPrivilege	1112	wmic.exe
Token: SeUndockPrivilege	1112	wmic.exe
Token: SeManageVolumePrivilege	1112	wmic.exe
Token: 33	1112	wmic.exe
Token: 34	1112	wmic.exe
Token: 35	1112	wmic.exe
Token: SeIncreaseQuotaPrivilege	1564	wmic.exe
Token: SeSecurityPrivilege	1564	wmic.exe
Token: SeTakeOwnershipPrivilege	1564	wmic.exe
Token: SeLoadDriverPrivilege	1564	wmic.exe
Token: SeSystemProfilePrivilege	1564	wmic.exe
Token: SeSystemtimePrivilege	1564	wmic.exe
Token: SeProfSingleProcessPrivilege	1564	wmic.exe
Token: SeIncBasePriorityPrivilege	1564	wmic.exe
Token: SeCreatePagefilePrivilege	1564	wmic.exe
Token: SeBackupPrivilege	1564	wmic.exe
Token: SeRestorePrivilege	1564	wmic.exe
Token: SeShutdownPrivilege	1564	wmic.exe
Token: SeDebugPrivilege	1564	wmic.exe
Token: SeSystemEnvironmentPrivilege	1564	wmic.exe
Token: SeRemoteShutdownPrivilege	1564	wmic.exe
Token: SeUndockPrivilege	1564	wmic.exe
Token: SeManageVolumePrivilege	1564	wmic.exe
Token: 33	1564	wmic.exe
Token: 34	1564	wmic.exe
Token: 35	1564	wmic.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

READ.exetaskeng.exe

description	pid	process	target process
PID 1572 wrote to memory of 592	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 592	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 592	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 592	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 328	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 328	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 328	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 328	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 428	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 428	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 428	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 428	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 1112	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 1112	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 1112	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 1112	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 1696	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 1696	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 1696	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 1696	1572	READ.exe	vssadmin.exe
PID 1572 wrote to memory of 1564	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 1564	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 1564	1572	READ.exe	wmic.exe
PID 1572 wrote to memory of 1564	1572	READ.exe	wmic.exe
PID 1884 wrote to memory of 1496	1884	taskeng.exe	svhost.exe
PID 1884 wrote to memory of 1496	1884	taskeng.exe	svhost.exe
PID 1884 wrote to memory of 1496	1884	taskeng.exe	svhost.exe
PID 1884 wrote to memory of 1496	1884	taskeng.exe	svhost.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

Processes:

READ.exe

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⤵
- 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:1572

C:\Windows\SysWOW64\vssadmin.exe
vssadmin.exe Delete Shadows /All /Quiet
2⤵
- Interacts with shadow copies
PID:592

C:\Windows\SysWOW64\Wbem\wmic.exe
wmic.exe SHADOWCOPY /nointeractive
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:328

C:\Windows\SysWOW64\vssadmin.exe
vssadmin.exe Delete Shadows /All /Quiet
2⤵
- Interacts with shadow copies
PID:428

C:\Windows\SysWOW64\Wbem\wmic.exe
wmic.exe SHADOWCOPY /nointeractive
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1112

C:\Windows\SysWOW64\vssadmin.exe
vssadmin.exe Delete Shadows /All /Quiet
2⤵
- Interacts with shadow copies
PID:1696

C:\Windows\SysWOW64\Wbem\wmic.exe
wmic.exe SHADOWCOPY /nointeractive
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1564

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1588

C:\Windows\system32\taskeng.exe
taskeng.exe {3CAA73E4-1EB3-4D20-B59F-E588AED2108F} S-1-5-21-2955169046-2371869340-1800780948-1000:UKNHJUQT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1884

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
2⤵
- Executes dropped EXE
PID:1496

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Bypass User Account Control

1

T1088

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

File Deletion

2

T1107

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

3

T1082

Query Registry

1

T1012

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Inhibit System Recovery

2

T1490

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Downloads

C:\Users\Admin\AppData\Roaming\svhost.exe
MD5
5ec29d96f5fefb2d726f9e120786eaa9

SHA1
3f8d050bd4e823b1f2c681856d1ae6d9007d5861

SHA256
8ee1f51602f957fa82c7e9c0d834d28873307a0c576ab8c7cc99ca85fcf43b2e

SHA512
e21682f2bfee29cd0c0765a10463b2f57bde5996fa367ee2b8b6f7fae9bf5703aec24319ddf2e33890b352331f8fedda41d79ff04ec8a881a6469f6bdba0d5ff

Download Submit
C:\Users\Admin\AppData\Roaming\svhost.exe
MD5
5ec29d96f5fefb2d726f9e120786eaa9

SHA1
3f8d050bd4e823b1f2c681856d1ae6d9007d5861

SHA256
8ee1f51602f957fa82c7e9c0d834d28873307a0c576ab8c7cc99ca85fcf43b2e

SHA512
e21682f2bfee29cd0c0765a10463b2f57bde5996fa367ee2b8b6f7fae9bf5703aec24319ddf2e33890b352331f8fedda41d79ff04ec8a881a6469f6bdba0d5ff

Download Submit
memory/328-57-0x0000000000000000-mapping.dmp

Download
memory/428-58-0x0000000000000000-mapping.dmp

Download
memory/592-56-0x0000000000000000-mapping.dmp

Download
memory/1112-59-0x0000000000000000-mapping.dmp

Download
memory/1496-63-0x0000000000000000-mapping.dmp

Download
memory/1564-61-0x0000000000000000-mapping.dmp

Download
memory/1572-55-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

Filesize
8KB

Download
memory/1696-60-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads