Analysis
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max time kernel
151s -
max time network
31s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
06-01-2023 19:39
Behavioral task
behavioral1
Sample
64_MEcip.exe
Resource
win7-20221111-en
windows7-x64
16 signatures
150 seconds
Behavioral task
behavioral2
Sample
64_MEcip.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
12 signatures
150 seconds
General
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Target
64_MEcip.exe
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Size
666KB
-
MD5
623256c79ccd20a1319f553f269b3867
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SHA1
a06b170b22424a87809d65171714a821d732831d
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SHA256
8c0cc36cba7d54c1c225c95ef0a05f95ed317ffdb17e952e452e6555a719a927
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SHA512
808cb0aa49799d33eb40e432d386b33341aadb220ff941dc5bd9d914baaafadd1c1dc646b24a8ff3a71890d1fd870f684876d8686909d2c902592d7b3fa81da4
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SSDEEP
12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAbC9+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:
49CB177FB9066DFD486F2909136A1DF7BA9E17487C95C66E53DB3776015FDA09346B5009C3DDB9C781DC90F0628E1E4C5D7047709BFA6BD7E0A157E5F933C270<br>BEF013FBEEE474782390528EE75630594C0FAF1AADEAA44940F923F91D3DDABD4E01139651111405ACB0D7042D643F646D1067A9FB7FBDCAE430B1EC995E<br>BC7BCC034FC1CA47F327D2604C9A086B3799E25F4C609CB1AE53C0E1FF8AD60B386C5A9F4D740FAA9C62AB034F1177DB085492F062FC224FA47B017FFDEA<br>D774BC8C7979EA3F7C891338197B57D1FAD243E06866FAAEB6AE6A2E57D7ED8EAA9E6B453F51379F6EA511281A6D9ACBC7343D1D5B7E086B3914542EF44F<br>002BF106CA2956BD3F41D9E4846ED42C86595488BBC1B395B2189E3949E75149FC565B43F702203656C9EBAE2D22AED0A67CD130FDCE391123B9CEFE27CD<br>5095FD6B79E707D8E10F32C6D1BEE0D5AC387B1B47EB4E01BDF5518DFD2618BE016DBF37765128C8B6781D6D95A8400EBFF9498A293FE9B7E89DF801043E<br>44DEF95A1CED872FDFCC1F530A45E589C0DA34637891A45F99B70541E006FAF0AC87A23D103C763AE2DE068B19699AD7C945D92427F0CE33E4ACF18EE480<br>EE764316BA1EFDA5C495B8F152122578EA8B80B870CE3B06E11F114A587496239C0B9029285DC2496F3AF9C9B8AC9E7AEBF1B188034F4D18B53CEAAF1C6B<br>0EC60D577D6462DBA7EBBB593506
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/0x000a000000012708-61.dat family_medusalocker behavioral1/files/0x000a000000012708-63.dat family_medusalocker -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip.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 536 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\EditNew.raw => C:\Users\Admin\Pictures\EditNew.raw.cipher 64_MEcip.exe File renamed C:\Users\Admin\Pictures\MountClear.png => C:\Users\Admin\Pictures\MountClear.png.cipher 64_MEcip.exe File renamed C:\Users\Admin\Pictures\ShowSave.tif => C:\Users\Admin\Pictures\ShowSave.tif.cipher 64_MEcip.exe File renamed C:\Users\Admin\Pictures\StopRequest.raw => C:\Users\Admin\Pictures\StopRequest.raw.cipher 64_MEcip.exe File renamed C:\Users\Admin\Pictures\WaitRead.raw => C:\Users\Admin\Pictures\WaitRead.raw.cipher 64_MEcip.exe File renamed C:\Users\Admin\Pictures\FindExport.tif => C:\Users\Admin\Pictures\FindExport.tif.cipher 64_MEcip.exe File opened for modification C:\Users\Admin\Pictures\GrantLimit.tiff 64_MEcip.exe File renamed C:\Users\Admin\Pictures\GrantLimit.tiff => C:\Users\Admin\Pictures\GrantLimit.tiff.cipher 64_MEcip.exe File renamed C:\Users\Admin\Pictures\RenameMove.crw => C:\Users\Admin\Pictures\RenameMove.crw.cipher 64_MEcip.exe File renamed C:\Users\Admin\Pictures\ResolveMount.png => C:\Users\Admin\Pictures\ResolveMount.png.cipher 64_MEcip.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_MEcip.exe -
Drops desktop.ini file(s) 1 IoCs
description ioc Process File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-3385717845-2518323428-350143044-1000\desktop.ini 64_MEcip.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) \??\Q: 64_MEcip.exe File opened (read-only) \??\I: 64_MEcip.exe File opened (read-only) \??\J: 64_MEcip.exe File opened (read-only) \??\K: 64_MEcip.exe File opened (read-only) \??\N: 64_MEcip.exe File opened (read-only) \??\Y: 64_MEcip.exe File opened (read-only) \??\Z: 64_MEcip.exe File opened (read-only) \??\F: 64_MEcip.exe File opened (read-only) \??\M: 64_MEcip.exe File opened (read-only) \??\O: 64_MEcip.exe File opened (read-only) \??\S: 64_MEcip.exe File opened (read-only) \??\T: 64_MEcip.exe File opened (read-only) \??\U: 64_MEcip.exe File opened (read-only) \??\X: 64_MEcip.exe File opened (read-only) \??\A: 64_MEcip.exe File opened (read-only) \??\G: 64_MEcip.exe File opened (read-only) \??\H: 64_MEcip.exe File opened (read-only) \??\R: 64_MEcip.exe File opened (read-only) \??\V: 64_MEcip.exe File opened (read-only) \??\W: 64_MEcip.exe File opened (read-only) \??\B: 64_MEcip.exe File opened (read-only) \??\E: 64_MEcip.exe File opened (read-only) \??\L: 64_MEcip.exe File opened (read-only) \??\P: 64_MEcip.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 1036 vssadmin.exe 1968 vssadmin.exe 700 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe 1528 64_MEcip.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeBackupPrivilege 1140 vssvc.exe Token: SeRestorePrivilege 1140 vssvc.exe Token: SeAuditPrivilege 1140 vssvc.exe Token: SeIncreaseQuotaPrivilege 524 wmic.exe Token: SeSecurityPrivilege 524 wmic.exe Token: SeTakeOwnershipPrivilege 524 wmic.exe Token: SeLoadDriverPrivilege 524 wmic.exe Token: SeSystemProfilePrivilege 524 wmic.exe Token: SeSystemtimePrivilege 524 wmic.exe Token: SeProfSingleProcessPrivilege 524 wmic.exe Token: SeIncBasePriorityPrivilege 524 wmic.exe Token: SeCreatePagefilePrivilege 524 wmic.exe Token: SeBackupPrivilege 524 wmic.exe Token: SeRestorePrivilege 524 wmic.exe Token: SeShutdownPrivilege 524 wmic.exe Token: SeDebugPrivilege 524 wmic.exe Token: SeSystemEnvironmentPrivilege 524 wmic.exe Token: SeRemoteShutdownPrivilege 524 wmic.exe Token: SeUndockPrivilege 524 wmic.exe Token: SeManageVolumePrivilege 524 wmic.exe Token: 33 524 wmic.exe Token: 34 524 wmic.exe Token: 35 524 wmic.exe Token: SeIncreaseQuotaPrivilege 1532 wmic.exe Token: SeSecurityPrivilege 1532 wmic.exe Token: SeTakeOwnershipPrivilege 1532 wmic.exe Token: SeLoadDriverPrivilege 1532 wmic.exe Token: SeSystemProfilePrivilege 1532 wmic.exe Token: SeSystemtimePrivilege 1532 wmic.exe Token: SeProfSingleProcessPrivilege 1532 wmic.exe Token: SeIncBasePriorityPrivilege 1532 wmic.exe Token: SeCreatePagefilePrivilege 1532 wmic.exe Token: SeBackupPrivilege 1532 wmic.exe Token: SeRestorePrivilege 1532 wmic.exe Token: SeShutdownPrivilege 1532 wmic.exe Token: SeDebugPrivilege 1532 wmic.exe Token: SeSystemEnvironmentPrivilege 1532 wmic.exe Token: SeRemoteShutdownPrivilege 1532 wmic.exe Token: SeUndockPrivilege 1532 wmic.exe Token: SeManageVolumePrivilege 1532 wmic.exe Token: 33 1532 wmic.exe Token: 34 1532 wmic.exe Token: 35 1532 wmic.exe Token: SeIncreaseQuotaPrivilege 1884 wmic.exe Token: SeSecurityPrivilege 1884 wmic.exe Token: SeTakeOwnershipPrivilege 1884 wmic.exe Token: SeLoadDriverPrivilege 1884 wmic.exe Token: SeSystemProfilePrivilege 1884 wmic.exe Token: SeSystemtimePrivilege 1884 wmic.exe Token: SeProfSingleProcessPrivilege 1884 wmic.exe Token: SeIncBasePriorityPrivilege 1884 wmic.exe Token: SeCreatePagefilePrivilege 1884 wmic.exe Token: SeBackupPrivilege 1884 wmic.exe Token: SeRestorePrivilege 1884 wmic.exe Token: SeShutdownPrivilege 1884 wmic.exe Token: SeDebugPrivilege 1884 wmic.exe Token: SeSystemEnvironmentPrivilege 1884 wmic.exe Token: SeRemoteShutdownPrivilege 1884 wmic.exe Token: SeUndockPrivilege 1884 wmic.exe Token: SeManageVolumePrivilege 1884 wmic.exe Token: 33 1884 wmic.exe Token: 34 1884 wmic.exe Token: 35 1884 wmic.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 1528 wrote to memory of 1036 1528 64_MEcip.exe 28 PID 1528 wrote to memory of 1036 1528 64_MEcip.exe 28 PID 1528 wrote to memory of 1036 1528 64_MEcip.exe 28 PID 1528 wrote to memory of 1036 1528 64_MEcip.exe 28 PID 1528 wrote to memory of 524 1528 64_MEcip.exe 31 PID 1528 wrote to memory of 524 1528 64_MEcip.exe 31 PID 1528 wrote to memory of 524 1528 64_MEcip.exe 31 PID 1528 wrote to memory of 524 1528 64_MEcip.exe 31 PID 1528 wrote to memory of 1968 1528 64_MEcip.exe 33 PID 1528 wrote to memory of 1968 1528 64_MEcip.exe 33 PID 1528 wrote to memory of 1968 1528 64_MEcip.exe 33 PID 1528 wrote to memory of 1968 1528 64_MEcip.exe 33 PID 1528 wrote to memory of 1532 1528 64_MEcip.exe 35 PID 1528 wrote to memory of 1532 1528 64_MEcip.exe 35 PID 1528 wrote to memory of 1532 1528 64_MEcip.exe 35 PID 1528 wrote to memory of 1532 1528 64_MEcip.exe 35 PID 1528 wrote to memory of 700 1528 64_MEcip.exe 37 PID 1528 wrote to memory of 700 1528 64_MEcip.exe 37 PID 1528 wrote to memory of 700 1528 64_MEcip.exe 37 PID 1528 wrote to memory of 700 1528 64_MEcip.exe 37 PID 1528 wrote to memory of 1884 1528 64_MEcip.exe 39 PID 1528 wrote to memory of 1884 1528 64_MEcip.exe 39 PID 1528 wrote to memory of 1884 1528 64_MEcip.exe 39 PID 1528 wrote to memory of 1884 1528 64_MEcip.exe 39 PID 1644 wrote to memory of 536 1644 taskeng.exe 42 PID 1644 wrote to memory of 536 1644 taskeng.exe 42 PID 1644 wrote to memory of 536 1644 taskeng.exe 42 PID 1644 wrote to memory of 536 1644 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_MEcip.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\64_MEcip.exe"C:\Users\Admin\AppData\Local\Temp\64_MEcip.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:1528 -
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1036
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:524
-
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1968
-
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1532
-
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:700
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1884
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1140
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C:\Windows\system32\taskeng.exetaskeng.exe {95DAFFEA-F210-4320-9AB0-0C54A5E2A1ED} S-1-5-21-3385717845-2518323428-350143044-1000:SABDUHNY\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:1644 -
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe2⤵
- Executes dropped EXE
PID:536
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
666KB
MD5623256c79ccd20a1319f553f269b3867
SHA1a06b170b22424a87809d65171714a821d732831d
SHA2568c0cc36cba7d54c1c225c95ef0a05f95ed317ffdb17e952e452e6555a719a927
SHA512808cb0aa49799d33eb40e432d386b33341aadb220ff941dc5bd9d914baaafadd1c1dc646b24a8ff3a71890d1fd870f684876d8686909d2c902592d7b3fa81da4
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Filesize
666KB
MD5623256c79ccd20a1319f553f269b3867
SHA1a06b170b22424a87809d65171714a821d732831d
SHA2568c0cc36cba7d54c1c225c95ef0a05f95ed317ffdb17e952e452e6555a719a927
SHA512808cb0aa49799d33eb40e432d386b33341aadb220ff941dc5bd9d914baaafadd1c1dc646b24a8ff3a71890d1fd870f684876d8686909d2c902592d7b3fa81da4