Analysis
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max time kernel
132s -
max time network
137s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
26-12-2022 19:26
Behavioral task
behavioral1
Sample
64_MEcip9.exe
Resource
win7-20221111-en
windows7-x64
16 signatures
150 seconds
Behavioral task
behavioral2
Sample
64_MEcip9.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
14 signatures
150 seconds
General
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Target
64_MEcip9.exe
-
Size
666KB
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MD5
8645a413332f840e925bac3cf19ceb57
-
SHA1
87ca0cd2e1c04c2437d302f2864d1e68ea991677
-
SHA256
ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea
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SHA512
ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e
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SSDEEP
12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAFC9+m:dd35lDbKDIwWUDyqS5omMC9+
Malware Config
Extracted
Path
C:\!-Recovery_Instructions-!.html
Ransom Note
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset='utf-8'>
<meta name='viewport' content='width=device-width,initial-scale=1'>
<title></title>
<style>
html, body {
background-color: #1a1a1a;
}
body {
padding-top: 1rem !important;
font-size: 1.3rem;
color: white;
}
#text h2 {
font-size: 2rem;
font-weight: 600;
line-height: 1.125;
}
.container {
max-width: 1152px;
flex-grow: 1;
margin: 0 auto;
position: relative;
width: auto;
}
.box {
background-color: #242424;
display: block;
padding: 1.25rem;
border: 1px solid #303030;
}
a {
color: #00b4d8;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
li {
margin-bottom: 10px;
}
</style>
</head>
<body>
<div class='container'>
<div class='box'>
<div id='text'>
<h2>If you get this message, your network was hacked!</h2>
<p>After we gained full access to your servers, we first downloaded a large amount of sensitive data and then encrypted all the data stored on them.</p>
<p>That includes personal information on your clients, partners, your personnel, accounting documents, and other crucial files that are necessary for your company to work normally.</p>
<p>We used modern complicated algorithms, so you or any recovery service will not be able to decrypt files without our help, wasting time on these attempts instead of negotiations can be fatal for your company.</p>
<p>Make sure to act within <span style='color:#f4a261;'>72</span> hours or the negotiations will be considered failed!</p>
<p>Inform your superior management about what's going on.</p>
<p> Contact us for pricing and decryption software.</p>
<p> Contact us by email:<p>
<h2>[email protected]</h2>
</p>If you do not receive a response within 24 hours, please contact us at our additional contacts:</p>
<p> 1) Download for TOX CHAT https://tox.chat/download.html</p>
<p> 2) Open chat<p>
<p>Add ID Chat: </p><h2>3C9D49B928FDC3C15F0314217623A71B865909B308576B4B0D10AEA62C98677B4A3F160D5C93</h2>
<p>If we did not answer you, leave the chat enabled, the operator will contact you!<p>
</p>To verify the possibility of the recovery of your files we can decrypted 1-3 file for free.</p>
</p>Attach file to the letter (no more than 5Mb).</p>
<h2>If you and us succeed the negotiations we will grant you:</h2>
<ul>
<li>complete confidentiality, we will keep in secret any information regarding to attack, your company will act as if nothing had happened.</li>
<li>comprehensive information about vulnerabilities of your network and security report.</li>
<li>software and instructions to decrypt all the data that was encrypted.</li>
<li>all sensitive downloaded data will be permanently deleted from our cloud storage and we will provide an erasure log.</li>
</ul>
<h2>Our options if you act like nothing's happening, refuse to make a deal or fail the negotiations:</h2>
<ul>
<li>inform the media and independent journalists about what happened to your servers. To prove it we'll publish a chunk of private data that you should have ciphered if you care about potential breaches.
Moreover, your company will inevitably take decent reputational loss which is hard to assess precisely.</li>
<li>inform your clients, employees, partners by phone, e-mail, sms and social networks that you haven't prevent their data leakage.
You will violate laws about private data protection.</li>
<li>start DDOS attack on you website and infrastructures.</li>
<li>personal data stored will be put on sale on the Darknet to find anyone interested to buy useful information regarding your company. It could be data mining agencies or your market competitors.</li>
<li>publish all the discovered vulnerabilities found in your network, so anyone will do anything with it.</li>
</ul>
<h2>Why pay us?</h2>
<p>We care about our reputation. You are welcome to google our cases up and be sure that we don't have a single case of failure to provide what we promissed.</p>
<p>Turning this issue to a bug bounty will save your private information, reputation and will allow you to use the security report and
avoid this kind of situations in future.</p>
<h2>Your personal ID</p>
Your ID:
441A629C085158658B9FFC12C3DE33A92A76902881AB2E37449E1FDFE5CA191E523666D1314ADFC77D4E599EF46CC061B074B5B10547EE440681F99B652956CF<br>ED024E9FC22217A184A161E3270E198E266BF0AC140622B6F6B240D0BE3AD2CB80DE280FA80281914F4FBA562538D3DE4C073C17D02968D9987DA893DF5E<br>94B5CB6AD1C51DCABAD6C1E97FB8E236735CADB418A13C2754109D0A0B3C9CB6B5057374E084E27A63A9BE89D36F51EAF7B084E25C9B3C6BBFDB659EE831<br>4B07FDE7A755A6C9063FEC4986582607EF0293B98E7C73FB93BB58F2E77A1E308E8623BCD8366CD3138C97ED235BE4AC3122DEBD14851615E07F0102C83A<br>7FD40286763CB93DDB686831AF6CD77A9BEA2A16CFE7F40B43D609547D99D68D5744A990722599072FDA1CFF5C5790BCCF69555EC797FC7EC5035A9FEA5D<br>3CDE817891CEF53EC05A59EADCEC7676D1B8394716926A96AE75B23835ABC23CC7CB3AC7219BCED48E9E15CD732D447F356F56C80253346132571F3F8A4D<br>EF92F1EB048F7A0680C98B3F3A9C2FB6A62414F60696B2CBE756D50E918F0D74A8FD3F9BF3C896C9DC0019BF881B7B80E7648BC991D294F007EE61F04561<br>11260F429BD30CDE42442609A2FA9B9B1EBD6585FFCE3CB1BC96D7B0700BEE1151BF4BF850EC99929EA61E15B22CFF98CD2A23947F7AC39C0CAC90DB373B<br>938736CE3B9B9F45B68EC863B924
Emails
<h2>[email protected]</h2>
URLs
https://tox.chat/download.html</p>
Signatures
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MedusaLocker
Ransomware with several variants first seen in September 2019.
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MedusaLocker payload 2 IoCs
resource yara_rule behavioral2/files/0x0003000000000721-135.dat family_medusalocker behavioral2/files/0x0003000000000721-136.dat family_medusalocker -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip9.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip9.exe -
Executes dropped EXE 1 IoCs
pid Process 2816 svhost.exe -
Modifies extensions of user files 2 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\AddStop.crw => C:\Users\Admin\Pictures\AddStop.crw.cipher9 64_MEcip9.exe File renamed C:\Users\Admin\Pictures\UpdateReset.png => C:\Users\Admin\Pictures\UpdateReset.png.cipher9 64_MEcip9.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" 64_MEcip9.exe -
Drops desktop.ini file(s) 1 IoCs
description ioc Process File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-2386679933-1492765628-3466841596-1000\desktop.ini 64_MEcip9.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) \??\H: 64_MEcip9.exe File opened (read-only) \??\I: 64_MEcip9.exe File opened (read-only) \??\L: 64_MEcip9.exe File opened (read-only) \??\Q: 64_MEcip9.exe File opened (read-only) \??\T: 64_MEcip9.exe File opened (read-only) \??\U: 64_MEcip9.exe File opened (read-only) \??\Y: 64_MEcip9.exe File opened (read-only) \??\G: 64_MEcip9.exe File opened (read-only) \??\Z: 64_MEcip9.exe File opened (read-only) \??\J: 64_MEcip9.exe File opened (read-only) \??\K: 64_MEcip9.exe File opened (read-only) \??\M: 64_MEcip9.exe File opened (read-only) \??\N: 64_MEcip9.exe File opened (read-only) \??\P: 64_MEcip9.exe File opened (read-only) \??\R: 64_MEcip9.exe File opened (read-only) \??\A: 64_MEcip9.exe File opened (read-only) \??\E: 64_MEcip9.exe File opened (read-only) \??\F: 64_MEcip9.exe File opened (read-only) \??\O: 64_MEcip9.exe File opened (read-only) \??\S: 64_MEcip9.exe File opened (read-only) \??\V: 64_MEcip9.exe File opened (read-only) \??\W: 64_MEcip9.exe File opened (read-only) \??\X: 64_MEcip9.exe File opened (read-only) \??\B: 64_MEcip9.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe 1168 64_MEcip9.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 2368 wmic.exe Token: SeSecurityPrivilege 2368 wmic.exe Token: SeTakeOwnershipPrivilege 2368 wmic.exe Token: SeLoadDriverPrivilege 2368 wmic.exe Token: SeSystemProfilePrivilege 2368 wmic.exe Token: SeSystemtimePrivilege 2368 wmic.exe Token: SeProfSingleProcessPrivilege 2368 wmic.exe Token: SeIncBasePriorityPrivilege 2368 wmic.exe Token: SeCreatePagefilePrivilege 2368 wmic.exe Token: SeBackupPrivilege 2368 wmic.exe Token: SeRestorePrivilege 2368 wmic.exe Token: SeShutdownPrivilege 2368 wmic.exe Token: SeDebugPrivilege 2368 wmic.exe Token: SeSystemEnvironmentPrivilege 2368 wmic.exe Token: SeRemoteShutdownPrivilege 2368 wmic.exe Token: SeUndockPrivilege 2368 wmic.exe Token: SeManageVolumePrivilege 2368 wmic.exe Token: 33 2368 wmic.exe Token: 34 2368 wmic.exe Token: 35 2368 wmic.exe Token: 36 2368 wmic.exe Token: SeIncreaseQuotaPrivilege 3852 wmic.exe Token: SeSecurityPrivilege 3852 wmic.exe Token: SeTakeOwnershipPrivilege 3852 wmic.exe Token: SeLoadDriverPrivilege 3852 wmic.exe Token: SeSystemProfilePrivilege 3852 wmic.exe Token: SeSystemtimePrivilege 3852 wmic.exe Token: SeProfSingleProcessPrivilege 3852 wmic.exe Token: SeIncBasePriorityPrivilege 3852 wmic.exe Token: SeCreatePagefilePrivilege 3852 wmic.exe Token: SeBackupPrivilege 3852 wmic.exe Token: SeRestorePrivilege 3852 wmic.exe Token: SeShutdownPrivilege 3852 wmic.exe Token: SeDebugPrivilege 3852 wmic.exe Token: SeSystemEnvironmentPrivilege 3852 wmic.exe Token: SeRemoteShutdownPrivilege 3852 wmic.exe Token: SeUndockPrivilege 3852 wmic.exe Token: SeManageVolumePrivilege 3852 wmic.exe Token: 33 3852 wmic.exe Token: 34 3852 wmic.exe Token: 35 3852 wmic.exe Token: 36 3852 wmic.exe Token: SeIncreaseQuotaPrivilege 2008 wmic.exe Token: SeSecurityPrivilege 2008 wmic.exe Token: SeTakeOwnershipPrivilege 2008 wmic.exe Token: SeLoadDriverPrivilege 2008 wmic.exe Token: SeSystemProfilePrivilege 2008 wmic.exe Token: SeSystemtimePrivilege 2008 wmic.exe Token: SeProfSingleProcessPrivilege 2008 wmic.exe Token: SeIncBasePriorityPrivilege 2008 wmic.exe Token: SeCreatePagefilePrivilege 2008 wmic.exe Token: SeBackupPrivilege 2008 wmic.exe Token: SeRestorePrivilege 2008 wmic.exe Token: SeShutdownPrivilege 2008 wmic.exe Token: SeDebugPrivilege 2008 wmic.exe Token: SeSystemEnvironmentPrivilege 2008 wmic.exe Token: SeRemoteShutdownPrivilege 2008 wmic.exe Token: SeUndockPrivilege 2008 wmic.exe Token: SeManageVolumePrivilege 2008 wmic.exe Token: 33 2008 wmic.exe Token: 34 2008 wmic.exe Token: 35 2008 wmic.exe Token: 36 2008 wmic.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 1168 wrote to memory of 2368 1168 64_MEcip9.exe 81 PID 1168 wrote to memory of 2368 1168 64_MEcip9.exe 81 PID 1168 wrote to memory of 2368 1168 64_MEcip9.exe 81 PID 1168 wrote to memory of 3852 1168 64_MEcip9.exe 84 PID 1168 wrote to memory of 3852 1168 64_MEcip9.exe 84 PID 1168 wrote to memory of 3852 1168 64_MEcip9.exe 84 PID 1168 wrote to memory of 2008 1168 64_MEcip9.exe 86 PID 1168 wrote to memory of 2008 1168 64_MEcip9.exe 86 PID 1168 wrote to memory of 2008 1168 64_MEcip9.exe 86 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip9.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip9.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" 64_MEcip9.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\64_MEcip9.exe"C:\Users\Admin\AppData\Local\Temp\64_MEcip9.exe"1⤵
- UAC bypass
- 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:1168 -
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2368
-
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:3852
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2008
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C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe1⤵
- Executes dropped EXE
PID:2816
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
-
Filesize
666KB
MD58645a413332f840e925bac3cf19ceb57
SHA187ca0cd2e1c04c2437d302f2864d1e68ea991677
SHA256ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea
SHA512ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e
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Filesize
666KB
MD58645a413332f840e925bac3cf19ceb57
SHA187ca0cd2e1c04c2437d302f2864d1e68ea991677
SHA256ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea
SHA512ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e