Analysis
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max time kernel
150s -
max time network
45s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
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submitted
20-12-2022 07:14
General
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Target
8e797fff8fae9afb216b81ae341aac9f05f419061075b0f6ce4c0c7a67f458a4.exe
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Size
666KB
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MD5
55c4883494e8846ca0f66f20973aee0e
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SHA1
0ac359313afbce0bd5a02a02e55a0c7f1004ee82
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SHA256
8e797fff8fae9afb216b81ae341aac9f05f419061075b0f6ce4c0c7a67f458a4
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SHA512
523dfd6ac0435f229cb5202f29ab45ea547d7666380301471c10274fc8892dfdeeb5f05283ae1b1176f40ef3fa4917db36495e7e3d9d89ba41944c8379f3edd8
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SSDEEP
12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulA4C9+m:dd35lDbKDIwWUDyqS5ompC9+
Score
10/10
Malware Config
Extracted
Path
C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-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:
F0B306D7BFA45E1C56AD239F7A2D4D095E146C86DB71DA45CA50448F236E12AD5C6E638774DFD37D08D46C37F4F318B235350DB6DE0B66FC0C67ABB10C91C090<br>F23E548CE3828A80447354020253280832056A55DE53F69D67064B5281EAB3816E031A7EA24EA99671AF12C62FF6CA6DDE29B7CAEC4284D6EC67661D3003<br>2E0D55B61C1E5465966269E195948DFF098B769D82245536F443205AF7A00F118EC7B2E22008BE675332C325B316214A63883BB4C4D424CEBAF32626E8B7<br>62B7435E4E517D45F7F339EDEF4076721376937D4781435366A60D22640C4FE55AD7B86B12BE1222695ADF84C7A6C47CBD3A059044D5D57C4F2E91D8A8F9<br>BF70E4FDA4187F787476C3ED41031D7AC342651D0C38D2CB8ACC98EC07B36D1185A436BF130CFAF10801E2366E09AAFA1591EA313857198C85C7387EC313<br>2902EFEB7BFC5B641243F30E7E7727FDC70276A8CFFE9B71B2A2F9575E34F788369BD3AEF3AE2862DE98AB713FDD8574B17804EBFDD783AA88DBB6B0C0E3<br>95CB298FCCC99E57414E29CC103D41D37B606B017ACFDBDC597C509E398803105FE35C5CBA9DA3D9DB9F78F29E4D788C50A8E627F6700457CB77C4802BE7<br>71BBEE24A3A321BFD2DB6EA388149132D1B2F453742FB7257A117308B6610A1C70E4FF9138BC6EC40CEC759BD9AB59DC551EFAD37CE7FB250913E58E5C0B<br>69DF691750BB7BC1A05894786272
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
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UAC bypass 3 TTPs 2 IoCs
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Executes dropped EXE 1 IoCs
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Modifies extensions of user files 4 IoCs
Ransomware generally changes the extension on encrypted files.
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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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Checks whether UAC is enabled 1 TTPs 1 IoCs
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Drops desktop.ini file(s) 1 IoCs
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Enumerates connected drives 3 TTPs 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
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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.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
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Suspicious use of AdjustPrivilegeToken 63 IoCs
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Suspicious use of WriteProcessMemory 28 IoCs
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System policy modification 1 TTPs 3 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\8e797fff8fae9afb216b81ae341aac9f05f419061075b0f6ce4c0c7a67f458a4.exe"C:\Users\Admin\AppData\Local\Temp\8e797fff8fae9afb216b81ae341aac9f05f419061075b0f6ce4c0c7a67f458a4.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
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\taskeng.exetaskeng.exe {3EECB86E-5987-49E6-A675-9A2E60681120} S-1-5-21-2292972927-2705560509-2768824231-1000:GRXNNIIE\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe2⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
666KB
MD555c4883494e8846ca0f66f20973aee0e
SHA10ac359313afbce0bd5a02a02e55a0c7f1004ee82
SHA2568e797fff8fae9afb216b81ae341aac9f05f419061075b0f6ce4c0c7a67f458a4
SHA512523dfd6ac0435f229cb5202f29ab45ea547d7666380301471c10274fc8892dfdeeb5f05283ae1b1176f40ef3fa4917db36495e7e3d9d89ba41944c8379f3edd8
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Filesize
666KB
MD555c4883494e8846ca0f66f20973aee0e
SHA10ac359313afbce0bd5a02a02e55a0c7f1004ee82
SHA2568e797fff8fae9afb216b81ae341aac9f05f419061075b0f6ce4c0c7a67f458a4
SHA512523dfd6ac0435f229cb5202f29ab45ea547d7666380301471c10274fc8892dfdeeb5f05283ae1b1176f40ef3fa4917db36495e7e3d9d89ba41944c8379f3edd8
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Filesize
8KB