Analysis
-
max time kernel
147s -
max time network
127s -
platform
windows7_x64 -
resource
win7-en-20211014 -
submitted
20/10/2021, 09:40
Static task
static1
Behavioral task
behavioral1
Sample
B.exe
Resource
win7-en-20211014
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
B.exe
Resource
win10-en-20210920
windows10_x64
0 signatures
0 seconds
Behavioral task
behavioral3
Sample
Build.exe
Resource
win7-en-20211014
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral4
Sample
Build.exe
Resource
win10-en-20210920
windows10_x64
0 signatures
0 seconds
Behavioral task
behavioral5
Sample
READ.exe
Resource
win7-en-20211014
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral6
Sample
READ.exe
Resource
win10-en-20210920
windows10_x64
0 signatures
0 seconds
Behavioral task
behavioral7
Sample
rb.exe
Resource
win7-en-20211014
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral8
Sample
rb.exe
Resource
win10-en-20210920
windows10_x64
0 signatures
0 seconds
General
-
Target
READ.exe
-
Size
669KB
-
MD5
5ec29d96f5fefb2d726f9e120786eaa9
-
SHA1
3f8d050bd4e823b1f2c681856d1ae6d9007d5861
-
SHA256
8ee1f51602f957fa82c7e9c0d834d28873307a0c576ab8c7cc99ca85fcf43b2e
-
SHA512
e21682f2bfee29cd0c0765a10463b2f57bde5996fa367ee2b8b6f7fae9bf5703aec24319ddf2e33890b352331f8fedda41d79ff04ec8a881a6469f6bdba0d5ff
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>
<!-- !!! dont changing this !!! -->
</div>
</div>
<!-- -->
<div class="tabs">
<!--tab-->
<div class="tab">
<div id="tab-content1" class="content">
<div class="text">
<!--text data -->
<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>
<!--text data -->
<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>
<!--tab-->
<!--text data -->
</div>
</div>
<!--tab-->
</div>
</div>
</body>
</html>
Emails
Signatures
-
MedusaLocker
Ransomware with several variants first seen in September 2019.
-
MedusaLocker Payload 2 IoCs
resource yara_rule behavioral5/files/0x000700000001220a-62.dat family_medusalocker behavioral5/files/0x000700000001220a-64.dat family_medusalocker -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
-
Executes dropped EXE 1 IoCs
pid Process 1496 svhost.exe -
Modifies extensions of user files 5 IoCs
Ransomware generally changes the extension on encrypted files.
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.
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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-1-5-21-2955169046-2371869340-1800780948-1000\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.
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.
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Interacts with shadow copies 2 TTPs 3 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 428 vssadmin.exe 1696 vssadmin.exe 592 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
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
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
description pid Process procid_target PID 1572 wrote to memory of 592 1572 READ.exe 27 PID 1572 wrote to memory of 592 1572 READ.exe 27 PID 1572 wrote to memory of 592 1572 READ.exe 27 PID 1572 wrote to memory of 592 1572 READ.exe 27 PID 1572 wrote to memory of 328 1572 READ.exe 30 PID 1572 wrote to memory of 328 1572 READ.exe 30 PID 1572 wrote to memory of 328 1572 READ.exe 30 PID 1572 wrote to memory of 328 1572 READ.exe 30 PID 1572 wrote to memory of 428 1572 READ.exe 32 PID 1572 wrote to memory of 428 1572 READ.exe 32 PID 1572 wrote to memory of 428 1572 READ.exe 32 PID 1572 wrote to memory of 428 1572 READ.exe 32 PID 1572 wrote to memory of 1112 1572 READ.exe 34 PID 1572 wrote to memory of 1112 1572 READ.exe 34 PID 1572 wrote to memory of 1112 1572 READ.exe 34 PID 1572 wrote to memory of 1112 1572 READ.exe 34 PID 1572 wrote to memory of 1696 1572 READ.exe 36 PID 1572 wrote to memory of 1696 1572 READ.exe 36 PID 1572 wrote to memory of 1696 1572 READ.exe 36 PID 1572 wrote to memory of 1696 1572 READ.exe 36 PID 1572 wrote to memory of 1564 1572 READ.exe 38 PID 1572 wrote to memory of 1564 1572 READ.exe 38 PID 1572 wrote to memory of 1564 1572 READ.exe 38 PID 1572 wrote to memory of 1564 1572 READ.exe 38 PID 1884 wrote to memory of 1496 1884 taskeng.exe 41 PID 1884 wrote to memory of 1496 1884 taskeng.exe 41 PID 1884 wrote to memory of 1496 1884 taskeng.exe 41 PID 1884 wrote to memory of 1496 1884 taskeng.exe 41 -
System policy modification 1 TTPs 3 IoCs
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
Processes
-
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.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:592
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:328
-
-
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:428
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1112
-
-
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1696
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1564
-
-
C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1588
-
C:\Windows\system32\taskeng.exetaskeng.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.exeC:\Users\Admin\AppData\Roaming\svhost.exe2⤵
- Executes dropped EXE
PID:1496
-