Analysis
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max time kernel
150s -
max time network
50s -
platform
windows7_x64 -
resource
win7-20220901-en -
resource tags
arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system -
submitted
26-12-2022 19:26
Behavioral task
behavioral1
Sample
64_MEcip7.exe
Resource
win7-20220901-en
windows7-x64
16 signatures
150 seconds
Behavioral task
behavioral2
Sample
64_MEcip7.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
14 signatures
150 seconds
General
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Target
64_MEcip7.exe
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Size
666KB
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MD5
4456e8bdb923c3733ad6aad308e38ecf
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SHA1
6cb74e1ebbe20a2f36fcb51faedf1acc2e4d4428
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SHA256
25520bf91d1fcdea481470450f058175d435d14d6bc03b30475acddc5b50b494
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SHA512
7f875690f6f40e004440fce72803973f37e82cb651bf3b122f56cc9bbf37e71f0a51f80d127f0d7d1a471b09a0b39e4f11a66da00f9fbb842ecbc9cbff006768
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SSDEEP
12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulA/C9+m:dd35lDbKDIwWUDyqS5omqC9+
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:
0A9BCE4DC5E2DD54741FDF3F97B817EDA5A468800B34CAA8B286F5834AF50D732F80973AD5B6302312487FBA2F775E1E9385A34736118F61D4BCAA4CCA029F8A<br>5E45A87C055DB0E7E808A151DF023BEE034C97F2A0743F7D97A4F0DE7A84979C3AEFD5001AB8A0331617AC91C5766F5BC20360F231E0708B524509050710<br>D9931F739A39BCC2290EA395081BDB898723EC5489EFC99D1777BD65DB92370D2D7557AD9D1F3C2E626990AA630E9B6AC1A3FD763BC8E8BC8B1002D69BB2<br>FFDC9489A34726DD96F155DF35273462C6A24FA72C5368A1A6B0333AFBEBB61AA07F58D72DA457BF280AD819C7BFACE7710CA91F897A92690760043C2C3C<br>AD7C0A786476E5EA37C0EE8ACE13C37ADDE934F7DAB8C14142FC72E8A5DDE271F925DFB69BE2A2839163FB98721DC11A67355F14D501833BE431AE48438F<br>79307C28775EC63D3BB037F2BE8D7A7E1CFB9D5B57FDBF3B02BD8A78E0CD038248E39D9DF1C5E086A11551E2C211FF1D4F657635668CA361E03788DAD6C0<br>484E9A0030428EB04F14CFCFD30BC1191653AA56A19337B7263B4A8CBC612F9C43E3E3D8324EE263741FC2D83E4D6455CE8EFB52D7FFC9E33C512445D445<br>24587F5C0E624E6BDF96A2D2FA5A0FDFA7413E12C91427AF0F7BC8FD06A08BE0A598212363D5EF8118E6214A29835B150D9E99E2B75F7EAC70696B43139D<br>074A95D4B3BFE4F6113F8E8C8E2B
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/0x000500000000b2d2-61.dat family_medusalocker behavioral1/files/0x000500000000b2d2-63.dat family_medusalocker -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip7.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip7.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 284 svhost.exe -
Modifies extensions of user files 10 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\DismountOpen.raw => C:\Users\Admin\Pictures\DismountOpen.raw.cipher7 64_MEcip7.exe File renamed C:\Users\Admin\Pictures\GrantLimit.raw => C:\Users\Admin\Pictures\GrantLimit.raw.cipher7 64_MEcip7.exe File renamed C:\Users\Admin\Pictures\InvokeExit.png => C:\Users\Admin\Pictures\InvokeExit.png.cipher7 64_MEcip7.exe File renamed C:\Users\Admin\Pictures\ShowWait.png => C:\Users\Admin\Pictures\ShowWait.png.cipher7 64_MEcip7.exe File renamed C:\Users\Admin\Pictures\UseAdd.png => C:\Users\Admin\Pictures\UseAdd.png.cipher7 64_MEcip7.exe File renamed C:\Users\Admin\Pictures\EnableAssert.tif => C:\Users\Admin\Pictures\EnableAssert.tif.cipher7 64_MEcip7.exe File renamed C:\Users\Admin\Pictures\ReadClose.crw => C:\Users\Admin\Pictures\ReadClose.crw.cipher7 64_MEcip7.exe File renamed C:\Users\Admin\Pictures\ResumeConvertFrom.png => C:\Users\Admin\Pictures\ResumeConvertFrom.png.cipher7 64_MEcip7.exe File renamed C:\Users\Admin\Pictures\SplitClear.png => C:\Users\Admin\Pictures\SplitClear.png.cipher7 64_MEcip7.exe File renamed C:\Users\Admin\Pictures\UnregisterAssert.tif => C:\Users\Admin\Pictures\UnregisterAssert.tif.cipher7 64_MEcip7.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_MEcip7.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_MEcip7.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) \??\B: 64_MEcip7.exe File opened (read-only) \??\O: 64_MEcip7.exe File opened (read-only) \??\S: 64_MEcip7.exe File opened (read-only) \??\A: 64_MEcip7.exe File opened (read-only) \??\F: 64_MEcip7.exe File opened (read-only) \??\I: 64_MEcip7.exe File opened (read-only) \??\P: 64_MEcip7.exe File opened (read-only) \??\W: 64_MEcip7.exe File opened (read-only) \??\X: 64_MEcip7.exe File opened (read-only) \??\E: 64_MEcip7.exe File opened (read-only) \??\L: 64_MEcip7.exe File opened (read-only) \??\M: 64_MEcip7.exe File opened (read-only) \??\N: 64_MEcip7.exe File opened (read-only) \??\R: 64_MEcip7.exe File opened (read-only) \??\U: 64_MEcip7.exe File opened (read-only) \??\V: 64_MEcip7.exe File opened (read-only) \??\Z: 64_MEcip7.exe File opened (read-only) \??\J: 64_MEcip7.exe File opened (read-only) \??\H: 64_MEcip7.exe File opened (read-only) \??\K: 64_MEcip7.exe File opened (read-only) \??\Q: 64_MEcip7.exe File opened (read-only) \??\T: 64_MEcip7.exe File opened (read-only) \??\Y: 64_MEcip7.exe File opened (read-only) \??\G: 64_MEcip7.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 872 vssadmin.exe 1116 vssadmin.exe 1524 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe 1324 64_MEcip7.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeBackupPrivilege 1728 vssvc.exe Token: SeRestorePrivilege 1728 vssvc.exe Token: SeAuditPrivilege 1728 vssvc.exe Token: SeIncreaseQuotaPrivilege 1752 wmic.exe Token: SeSecurityPrivilege 1752 wmic.exe Token: SeTakeOwnershipPrivilege 1752 wmic.exe Token: SeLoadDriverPrivilege 1752 wmic.exe Token: SeSystemProfilePrivilege 1752 wmic.exe Token: SeSystemtimePrivilege 1752 wmic.exe Token: SeProfSingleProcessPrivilege 1752 wmic.exe Token: SeIncBasePriorityPrivilege 1752 wmic.exe Token: SeCreatePagefilePrivilege 1752 wmic.exe Token: SeBackupPrivilege 1752 wmic.exe Token: SeRestorePrivilege 1752 wmic.exe Token: SeShutdownPrivilege 1752 wmic.exe Token: SeDebugPrivilege 1752 wmic.exe Token: SeSystemEnvironmentPrivilege 1752 wmic.exe Token: SeRemoteShutdownPrivilege 1752 wmic.exe Token: SeUndockPrivilege 1752 wmic.exe Token: SeManageVolumePrivilege 1752 wmic.exe Token: 33 1752 wmic.exe Token: 34 1752 wmic.exe Token: 35 1752 wmic.exe Token: SeIncreaseQuotaPrivilege 1248 wmic.exe Token: SeSecurityPrivilege 1248 wmic.exe Token: SeTakeOwnershipPrivilege 1248 wmic.exe Token: SeLoadDriverPrivilege 1248 wmic.exe Token: SeSystemProfilePrivilege 1248 wmic.exe Token: SeSystemtimePrivilege 1248 wmic.exe Token: SeProfSingleProcessPrivilege 1248 wmic.exe Token: SeIncBasePriorityPrivilege 1248 wmic.exe Token: SeCreatePagefilePrivilege 1248 wmic.exe Token: SeBackupPrivilege 1248 wmic.exe Token: SeRestorePrivilege 1248 wmic.exe Token: SeShutdownPrivilege 1248 wmic.exe Token: SeDebugPrivilege 1248 wmic.exe Token: SeSystemEnvironmentPrivilege 1248 wmic.exe Token: SeRemoteShutdownPrivilege 1248 wmic.exe Token: SeUndockPrivilege 1248 wmic.exe Token: SeManageVolumePrivilege 1248 wmic.exe Token: 33 1248 wmic.exe Token: 34 1248 wmic.exe Token: 35 1248 wmic.exe Token: SeIncreaseQuotaPrivilege 1572 wmic.exe Token: SeSecurityPrivilege 1572 wmic.exe Token: SeTakeOwnershipPrivilege 1572 wmic.exe Token: SeLoadDriverPrivilege 1572 wmic.exe Token: SeSystemProfilePrivilege 1572 wmic.exe Token: SeSystemtimePrivilege 1572 wmic.exe Token: SeProfSingleProcessPrivilege 1572 wmic.exe Token: SeIncBasePriorityPrivilege 1572 wmic.exe Token: SeCreatePagefilePrivilege 1572 wmic.exe Token: SeBackupPrivilege 1572 wmic.exe Token: SeRestorePrivilege 1572 wmic.exe Token: SeShutdownPrivilege 1572 wmic.exe Token: SeDebugPrivilege 1572 wmic.exe Token: SeSystemEnvironmentPrivilege 1572 wmic.exe Token: SeRemoteShutdownPrivilege 1572 wmic.exe Token: SeUndockPrivilege 1572 wmic.exe Token: SeManageVolumePrivilege 1572 wmic.exe Token: 33 1572 wmic.exe Token: 34 1572 wmic.exe Token: 35 1572 wmic.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 1324 wrote to memory of 872 1324 64_MEcip7.exe 27 PID 1324 wrote to memory of 872 1324 64_MEcip7.exe 27 PID 1324 wrote to memory of 872 1324 64_MEcip7.exe 27 PID 1324 wrote to memory of 872 1324 64_MEcip7.exe 27 PID 1324 wrote to memory of 1752 1324 64_MEcip7.exe 30 PID 1324 wrote to memory of 1752 1324 64_MEcip7.exe 30 PID 1324 wrote to memory of 1752 1324 64_MEcip7.exe 30 PID 1324 wrote to memory of 1752 1324 64_MEcip7.exe 30 PID 1324 wrote to memory of 1116 1324 64_MEcip7.exe 32 PID 1324 wrote to memory of 1116 1324 64_MEcip7.exe 32 PID 1324 wrote to memory of 1116 1324 64_MEcip7.exe 32 PID 1324 wrote to memory of 1116 1324 64_MEcip7.exe 32 PID 1324 wrote to memory of 1248 1324 64_MEcip7.exe 34 PID 1324 wrote to memory of 1248 1324 64_MEcip7.exe 34 PID 1324 wrote to memory of 1248 1324 64_MEcip7.exe 34 PID 1324 wrote to memory of 1248 1324 64_MEcip7.exe 34 PID 1324 wrote to memory of 1524 1324 64_MEcip7.exe 36 PID 1324 wrote to memory of 1524 1324 64_MEcip7.exe 36 PID 1324 wrote to memory of 1524 1324 64_MEcip7.exe 36 PID 1324 wrote to memory of 1524 1324 64_MEcip7.exe 36 PID 1324 wrote to memory of 1572 1324 64_MEcip7.exe 38 PID 1324 wrote to memory of 1572 1324 64_MEcip7.exe 38 PID 1324 wrote to memory of 1572 1324 64_MEcip7.exe 38 PID 1324 wrote to memory of 1572 1324 64_MEcip7.exe 38 PID 1996 wrote to memory of 284 1996 taskeng.exe 42 PID 1996 wrote to memory of 284 1996 taskeng.exe 42 PID 1996 wrote to memory of 284 1996 taskeng.exe 42 PID 1996 wrote to memory of 284 1996 taskeng.exe 42 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip7.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip7.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" 64_MEcip7.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\64_MEcip7.exe"C:\Users\Admin\AppData\Local\Temp\64_MEcip7.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:1324 -
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:872
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1752
-
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1116
-
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1248
-
-
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1524
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-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1572
-
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1728
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C:\Windows\system32\taskeng.exetaskeng.exe {4DCDA969-C6CC-4958-B443-68BF43228A1A} S-1-5-21-4063495947-34355257-727531523-1000:RYNKSFQE\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:1996 -
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe2⤵
- Executes dropped EXE
PID:284
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
666KB
MD54456e8bdb923c3733ad6aad308e38ecf
SHA16cb74e1ebbe20a2f36fcb51faedf1acc2e4d4428
SHA25625520bf91d1fcdea481470450f058175d435d14d6bc03b30475acddc5b50b494
SHA5127f875690f6f40e004440fce72803973f37e82cb651bf3b122f56cc9bbf37e71f0a51f80d127f0d7d1a471b09a0b39e4f11a66da00f9fbb842ecbc9cbff006768
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Filesize
666KB
MD54456e8bdb923c3733ad6aad308e38ecf
SHA16cb74e1ebbe20a2f36fcb51faedf1acc2e4d4428
SHA25625520bf91d1fcdea481470450f058175d435d14d6bc03b30475acddc5b50b494
SHA5127f875690f6f40e004440fce72803973f37e82cb651bf3b122f56cc9bbf37e71f0a51f80d127f0d7d1a471b09a0b39e4f11a66da00f9fbb842ecbc9cbff006768