Analysis
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max time kernel
150s -
max time network
49s -
platform
windows7_x64 -
resource
win7-20220901-en -
resource tags
arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system -
submitted
12-12-2022 15:09
Behavioral task
behavioral1
Sample
64_MEcip9.exe
Resource
win7-20220901-en
windows7-x64
16 signatures
150 seconds
Behavioral task
behavioral2
Sample
64_MEcip9.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
14 signatures
150 seconds
General
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Target
64_MEcip9.exe
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Size
666KB
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MD5
8645a413332f840e925bac3cf19ceb57
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SHA1
87ca0cd2e1c04c2437d302f2864d1e68ea991677
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SHA256
ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea
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SHA512
ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e
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SSDEEP
12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAFC9+m:dd35lDbKDIwWUDyqS5omMC9+
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:
12DF2D62E6E778D85C1EE2625E363EF80A99256017CF561E097EDDA89141A2464B0DC9729DBBD03A2A70995B7AD691A47B5039F7B1C8B870F5E6E65DD2469EE5<br>88C77CF83AF1603271CE8F2412FB71ECEAA92175AF9B5E0BD777BF1E258F35F0CDF3300E6D167C01142A2D96C075FDC80CE8E5874011A6E5A45D47745885<br>EE6B2814F1CD5E8C1A025FE8209B86362056F6148C12C939BB4D0B50AAC521F648C2005ED5E9626B1B807BA0D965D05F0A09D27559AFDDA00567B0448C7E<br>33C1BA8C1FF27266D70AAEEA4C3F4A9343264F70C370BFCC5F517A6A70775B60D92F02D91F8BA6C632C0158683C271CFE747A80D32CA0B762028E752D57D<br>7E06CC21637578F6EAC0A38961CAAB5A685670C6D5093832DE070A849247D5E325624DB444E4E16A03949858C85C28B592B502BA8238B1EC231EB0D69422<br>41309A99FBB815884D11A9A674B043967EA90C65A7D45917D08ABDE282310D6BE6AF102420866EB122F79E343D624F064D1ECBAB885D1E602A9BDD458E0A<br>BBFA32EDB502EC12820EDE156FF89DC1A666F590AD309033AF9C73E988D2FA28008A5D9A036BC219BE1DB8A6031998363C7533273E9664F8CBF6D956EB05<br>783A424CDAE682D4FE2C948D6D49A7C707D7796E61CD3C9183EB0E4C639B42FFA4F0DDE3ECDA3B8209DA85CE63D898A17E0598580168889DDA2656EFA75F<br>303CEF8D23DF4DBB1DBB9322D139
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 behavioral1/files/0x0008000000005c51-61.dat family_medusalocker behavioral1/files/0x0008000000005c51-63.dat family_medusalocker -
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 -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Executes dropped EXE 1 IoCs
pid Process 1676 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\SetSave.png => C:\Users\Admin\Pictures\SetSave.png.cipher9 64_MEcip9.exe File renamed C:\Users\Admin\Pictures\ExitExpand.crw => C:\Users\Admin\Pictures\ExitExpand.crw.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-1-5-21-4063495947-34355257-727531523-1000\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) \??\O: 64_MEcip9.exe File opened (read-only) \??\Q: 64_MEcip9.exe File opened (read-only) \??\R: 64_MEcip9.exe File opened (read-only) \??\S: 64_MEcip9.exe File opened (read-only) \??\G: 64_MEcip9.exe File opened (read-only) \??\M: 64_MEcip9.exe File opened (read-only) \??\P: 64_MEcip9.exe File opened (read-only) \??\W: 64_MEcip9.exe File opened (read-only) \??\K: 64_MEcip9.exe File opened (read-only) \??\E: 64_MEcip9.exe File opened (read-only) \??\F: 64_MEcip9.exe File opened (read-only) \??\H: 64_MEcip9.exe File opened (read-only) \??\I: 64_MEcip9.exe File opened (read-only) \??\J: 64_MEcip9.exe File opened (read-only) \??\L: 64_MEcip9.exe File opened (read-only) \??\V: 64_MEcip9.exe File opened (read-only) \??\A: 64_MEcip9.exe File opened (read-only) \??\Z: 64_MEcip9.exe File opened (read-only) \??\N: 64_MEcip9.exe File opened (read-only) \??\T: 64_MEcip9.exe File opened (read-only) \??\U: 64_MEcip9.exe File opened (read-only) \??\X: 64_MEcip9.exe File opened (read-only) \??\Y: 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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Interacts with shadow copies 2 TTPs 3 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 1644 vssadmin.exe 1272 vssadmin.exe 1568 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe 1204 64_MEcip9.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeBackupPrivilege 664 vssvc.exe Token: SeRestorePrivilege 664 vssvc.exe Token: SeAuditPrivilege 664 vssvc.exe Token: SeIncreaseQuotaPrivilege 1664 wmic.exe Token: SeSecurityPrivilege 1664 wmic.exe Token: SeTakeOwnershipPrivilege 1664 wmic.exe Token: SeLoadDriverPrivilege 1664 wmic.exe Token: SeSystemProfilePrivilege 1664 wmic.exe Token: SeSystemtimePrivilege 1664 wmic.exe Token: SeProfSingleProcessPrivilege 1664 wmic.exe Token: SeIncBasePriorityPrivilege 1664 wmic.exe Token: SeCreatePagefilePrivilege 1664 wmic.exe Token: SeBackupPrivilege 1664 wmic.exe Token: SeRestorePrivilege 1664 wmic.exe Token: SeShutdownPrivilege 1664 wmic.exe Token: SeDebugPrivilege 1664 wmic.exe Token: SeSystemEnvironmentPrivilege 1664 wmic.exe Token: SeRemoteShutdownPrivilege 1664 wmic.exe Token: SeUndockPrivilege 1664 wmic.exe Token: SeManageVolumePrivilege 1664 wmic.exe Token: 33 1664 wmic.exe Token: 34 1664 wmic.exe Token: 35 1664 wmic.exe Token: SeIncreaseQuotaPrivilege 1864 wmic.exe Token: SeSecurityPrivilege 1864 wmic.exe Token: SeTakeOwnershipPrivilege 1864 wmic.exe Token: SeLoadDriverPrivilege 1864 wmic.exe Token: SeSystemProfilePrivilege 1864 wmic.exe Token: SeSystemtimePrivilege 1864 wmic.exe Token: SeProfSingleProcessPrivilege 1864 wmic.exe Token: SeIncBasePriorityPrivilege 1864 wmic.exe Token: SeCreatePagefilePrivilege 1864 wmic.exe Token: SeBackupPrivilege 1864 wmic.exe Token: SeRestorePrivilege 1864 wmic.exe Token: SeShutdownPrivilege 1864 wmic.exe Token: SeDebugPrivilege 1864 wmic.exe Token: SeSystemEnvironmentPrivilege 1864 wmic.exe Token: SeRemoteShutdownPrivilege 1864 wmic.exe Token: SeUndockPrivilege 1864 wmic.exe Token: SeManageVolumePrivilege 1864 wmic.exe Token: 33 1864 wmic.exe Token: 34 1864 wmic.exe Token: 35 1864 wmic.exe Token: SeIncreaseQuotaPrivilege 2040 wmic.exe Token: SeSecurityPrivilege 2040 wmic.exe Token: SeTakeOwnershipPrivilege 2040 wmic.exe Token: SeLoadDriverPrivilege 2040 wmic.exe Token: SeSystemProfilePrivilege 2040 wmic.exe Token: SeSystemtimePrivilege 2040 wmic.exe Token: SeProfSingleProcessPrivilege 2040 wmic.exe Token: SeIncBasePriorityPrivilege 2040 wmic.exe Token: SeCreatePagefilePrivilege 2040 wmic.exe Token: SeBackupPrivilege 2040 wmic.exe Token: SeRestorePrivilege 2040 wmic.exe Token: SeShutdownPrivilege 2040 wmic.exe Token: SeDebugPrivilege 2040 wmic.exe Token: SeSystemEnvironmentPrivilege 2040 wmic.exe Token: SeRemoteShutdownPrivilege 2040 wmic.exe Token: SeUndockPrivilege 2040 wmic.exe Token: SeManageVolumePrivilege 2040 wmic.exe Token: 33 2040 wmic.exe Token: 34 2040 wmic.exe Token: 35 2040 wmic.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 1204 wrote to memory of 1644 1204 64_MEcip9.exe 27 PID 1204 wrote to memory of 1644 1204 64_MEcip9.exe 27 PID 1204 wrote to memory of 1644 1204 64_MEcip9.exe 27 PID 1204 wrote to memory of 1644 1204 64_MEcip9.exe 27 PID 1204 wrote to memory of 1664 1204 64_MEcip9.exe 30 PID 1204 wrote to memory of 1664 1204 64_MEcip9.exe 30 PID 1204 wrote to memory of 1664 1204 64_MEcip9.exe 30 PID 1204 wrote to memory of 1664 1204 64_MEcip9.exe 30 PID 1204 wrote to memory of 1272 1204 64_MEcip9.exe 32 PID 1204 wrote to memory of 1272 1204 64_MEcip9.exe 32 PID 1204 wrote to memory of 1272 1204 64_MEcip9.exe 32 PID 1204 wrote to memory of 1272 1204 64_MEcip9.exe 32 PID 1204 wrote to memory of 1864 1204 64_MEcip9.exe 34 PID 1204 wrote to memory of 1864 1204 64_MEcip9.exe 34 PID 1204 wrote to memory of 1864 1204 64_MEcip9.exe 34 PID 1204 wrote to memory of 1864 1204 64_MEcip9.exe 34 PID 1204 wrote to memory of 1568 1204 64_MEcip9.exe 36 PID 1204 wrote to memory of 1568 1204 64_MEcip9.exe 36 PID 1204 wrote to memory of 1568 1204 64_MEcip9.exe 36 PID 1204 wrote to memory of 1568 1204 64_MEcip9.exe 36 PID 1204 wrote to memory of 2040 1204 64_MEcip9.exe 38 PID 1204 wrote to memory of 2040 1204 64_MEcip9.exe 38 PID 1204 wrote to memory of 2040 1204 64_MEcip9.exe 38 PID 1204 wrote to memory of 2040 1204 64_MEcip9.exe 38 PID 1012 wrote to memory of 1676 1012 taskeng.exe 42 PID 1012 wrote to memory of 1676 1012 taskeng.exe 42 PID 1012 wrote to memory of 1676 1012 taskeng.exe 42 PID 1012 wrote to memory of 1676 1012 taskeng.exe 42 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" 64_MEcip9.exe 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
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:1204 -
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1644
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1664
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1272
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1864
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1568
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2040
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:664
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C:\Windows\system32\taskeng.exetaskeng.exe {D6B66D1E-9DEF-495F-9A6D-911AE39BCF2E} S-1-5-21-4063495947-34355257-727531523-1000:RYNKSFQE\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:1012 -
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe2⤵
- Executes dropped EXE
PID:1676
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
666KB
MD58645a413332f840e925bac3cf19ceb57
SHA187ca0cd2e1c04c2437d302f2864d1e68ea991677
SHA256ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea
SHA512ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e
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Filesize
666KB
MD58645a413332f840e925bac3cf19ceb57
SHA187ca0cd2e1c04c2437d302f2864d1e68ea991677
SHA256ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea
SHA512ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e