Analysis
- max time kernel
147s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system - submitted
06/01/2023, 19:39
Behavioral task
behavioral1
Sample
64_MEcip9.exe
Resource
win7-20221111-en
windows7-x64
14 signatures
150 seconds
Behavioral task
behavioral2
Sample
64_MEcip9.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
14 signatures
150 seconds
General
- Target 64_MEcip9.exe
- Size 666KB
- Sample230106-ydewyabe37
- SHA256 ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea
- MD5 8645a413332f840e925bac3cf19ceb57
- SHA1 87ca0cd2e1c04c2437d302f2864d1e68ea991677
- SHA512 ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e
- SSDEEP 12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAFC9+m:dd35lDbKDIwWUDyqS5omMC9+
- MD5 SHA1 SHA512 SSDEEP
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: 4FC0AAA9DEB4679A78A296A34CFB13178B55CE7FF1FFC108D802F205A559398D3AE9689D36DC99A560FC1E4D588BFE319F4C14E6FFC74033257A227521BB3A17<br>82FEFC566BDA5BAB2851AE37B9A34184D05A0BA8C757DF257D72F09872C90122750C8A959B0C31A8E913FC5D51FB99B592D30989B19251CF1787A3CE98B5<br>E5B9776DE3C71A8F932814FED8E284472D61865C46CD0C708F3FFAC394831E6863A9779CAE40F755597623DC9B5E24C724E5D6AA2AA6F5503782D14E9235<br>F803203C03F72750E9762876F5255D59EDFE87E60848BA2A5FE7E797D779A0BCAA1E49F3E6FD378C6F733E87392BC691463532986CBD5C19A76C5C72256E<br>1BF2AAA8D68374CA1D939C43E5D6F2A7EFF14B30AB622D0491389C51B18F1C02478E3C07F7A49D62B7AE249E2151F33CCBE4298FA46DE2612C64DE525BA4<br>D91F2D2A3B1D6CDD9DCA9F48964F649D4894E500F5050BA2D9A5C179335F64640E11A305064E0ECF76EBA89E3A6D42AFBABD4059198E6B27B81CA4E58D22<br>1A6ADBCFECBABF7583BA2BA8031E9DEDA7C1B038ADAAD7ED4F41ABB7667F86B3FA893EA1324C395682F1B344D23B9728506E1F2188F2D3E5A2C1EF127AB6<br>A979C8592C9C32E4209F8D1B62D236D4F88F8D86A0E491B1A93C1B9444CCB5904D8ADD369AD784AE2EC607C72946A9521AA7876BF0FCCFDAD0D16E58E804<br>CFDF41A6780DF60D174997902C7B
Emails
-
<h2>[email protected]</h2>
URLs
-
https://tox.chat/download.html</p>
Signatures
- MedusaLocker
Ransomware with several variants first seen in September 2019.
- MedusaLocker payload 2 IoCs
resource yara_rule behavioral2/files/0x0007000000022e5a-135.dat family_medusalocker behavioral2/files/0x0007000000022e5a-136.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 - Executes dropped EXE 1 IoCs
pid Process 1836 svhost.exe - Modifies extensions of user files 6 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\EnterStart.tif => C:\Users\Admin\Pictures\EnterStart.tif.cipher9 64_MEcip9.exe File opened for modification C:\Users\Admin\Pictures\NewDebug.tiff 64_MEcip9.exe File renamed C:\Users\Admin\Pictures\NewDebug.tiff => C:\Users\Admin\Pictures\NewDebug.tiff.cipher9 64_MEcip9.exe File renamed C:\Users\Admin\Pictures\PushRename.png => C:\Users\Admin\Pictures\PushRename.png.cipher9 64_MEcip9.exe File renamed C:\Users\Admin\Pictures\AddConvert.tif => C:\Users\Admin\Pictures\AddConvert.tif.cipher9 64_MEcip9.exe File renamed C:\Users\Admin\Pictures\DisconnectConfirm.tif => C:\Users\Admin\Pictures\DisconnectConfirm.tif.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.
-
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) \??\K: 64_MEcip9.exe File opened (read-only) \??\S: 64_MEcip9.exe File opened (read-only) \??\T: 64_MEcip9.exe File opened (read-only) \??\X: 64_MEcip9.exe File opened (read-only) \??\Y: 64_MEcip9.exe File opened (read-only) \??\A: 64_MEcip9.exe File opened (read-only) \??\H: 64_MEcip9.exe File opened (read-only) \??\J: 64_MEcip9.exe File opened (read-only) \??\Q: 64_MEcip9.exe File opened (read-only) \??\G: 64_MEcip9.exe File opened (read-only) \??\I: 64_MEcip9.exe File opened (read-only) \??\L: 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) \??\E: 64_MEcip9.exe File opened (read-only) \??\F: 64_MEcip9.exe File opened (read-only) \??\W: 64_MEcip9.exe File opened (read-only) \??\R: 64_MEcip9.exe File opened (read-only) \??\U: 64_MEcip9.exe File opened (read-only) \??\V: 64_MEcip9.exe File opened (read-only) \??\Z: 64_MEcip9.exe File opened (read-only) \??\B: 64_MEcip9.exe File opened (read-only) \??\O: 64_MEcip9.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe 4952 64_MEcip9.exe - Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 640 wmic.exe Token: SeSecurityPrivilege 640 wmic.exe Token: SeTakeOwnershipPrivilege 640 wmic.exe Token: SeLoadDriverPrivilege 640 wmic.exe Token: SeSystemProfilePrivilege 640 wmic.exe Token: SeSystemtimePrivilege 640 wmic.exe Token: SeProfSingleProcessPrivilege 640 wmic.exe Token: SeIncBasePriorityPrivilege 640 wmic.exe Token: SeCreatePagefilePrivilege 640 wmic.exe Token: SeBackupPrivilege 640 wmic.exe Token: SeRestorePrivilege 640 wmic.exe Token: SeShutdownPrivilege 640 wmic.exe Token: SeDebugPrivilege 640 wmic.exe Token: SeSystemEnvironmentPrivilege 640 wmic.exe Token: SeRemoteShutdownPrivilege 640 wmic.exe Token: SeUndockPrivilege 640 wmic.exe Token: SeManageVolumePrivilege 640 wmic.exe Token: 33 640 wmic.exe Token: 34 640 wmic.exe Token: 35 640 wmic.exe Token: 36 640 wmic.exe Token: SeIncreaseQuotaPrivilege 4216 wmic.exe Token: SeSecurityPrivilege 4216 wmic.exe Token: SeTakeOwnershipPrivilege 4216 wmic.exe Token: SeLoadDriverPrivilege 4216 wmic.exe Token: SeSystemProfilePrivilege 4216 wmic.exe Token: SeSystemtimePrivilege 4216 wmic.exe Token: SeProfSingleProcessPrivilege 4216 wmic.exe Token: SeIncBasePriorityPrivilege 4216 wmic.exe Token: SeCreatePagefilePrivilege 4216 wmic.exe Token: SeBackupPrivilege 4216 wmic.exe Token: SeRestorePrivilege 4216 wmic.exe Token: SeShutdownPrivilege 4216 wmic.exe Token: SeDebugPrivilege 4216 wmic.exe Token: SeSystemEnvironmentPrivilege 4216 wmic.exe Token: SeRemoteShutdownPrivilege 4216 wmic.exe Token: SeUndockPrivilege 4216 wmic.exe Token: SeManageVolumePrivilege 4216 wmic.exe Token: 33 4216 wmic.exe Token: 34 4216 wmic.exe Token: 35 4216 wmic.exe Token: 36 4216 wmic.exe Token: SeIncreaseQuotaPrivilege 1260 wmic.exe Token: SeSecurityPrivilege 1260 wmic.exe Token: SeTakeOwnershipPrivilege 1260 wmic.exe Token: SeLoadDriverPrivilege 1260 wmic.exe Token: SeSystemProfilePrivilege 1260 wmic.exe Token: SeSystemtimePrivilege 1260 wmic.exe Token: SeProfSingleProcessPrivilege 1260 wmic.exe Token: SeIncBasePriorityPrivilege 1260 wmic.exe Token: SeCreatePagefilePrivilege 1260 wmic.exe Token: SeBackupPrivilege 1260 wmic.exe Token: SeRestorePrivilege 1260 wmic.exe Token: SeShutdownPrivilege 1260 wmic.exe Token: SeDebugPrivilege 1260 wmic.exe Token: SeSystemEnvironmentPrivilege 1260 wmic.exe Token: SeRemoteShutdownPrivilege 1260 wmic.exe Token: SeUndockPrivilege 1260 wmic.exe Token: SeManageVolumePrivilege 1260 wmic.exe Token: 33 1260 wmic.exe Token: 34 1260 wmic.exe Token: 35 1260 wmic.exe Token: 36 1260 wmic.exe - Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 4952 wrote to memory of 640 4952 64_MEcip9.exe 83 PID 4952 wrote to memory of 640 4952 64_MEcip9.exe 83 PID 4952 wrote to memory of 640 4952 64_MEcip9.exe 83 PID 4952 wrote to memory of 4216 4952 64_MEcip9.exe 85 PID 4952 wrote to memory of 4216 4952 64_MEcip9.exe 85 PID 4952 wrote to memory of 4216 4952 64_MEcip9.exe 85 PID 4952 wrote to memory of 1260 4952 64_MEcip9.exe 87 PID 4952 wrote to memory of 1260 4952 64_MEcip9.exe 87 PID 4952 wrote to memory of 1260 4952 64_MEcip9.exe 87 - 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
-
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:4952 -
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:640
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4216
-
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1260
-
-
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe1⤵
- Executes dropped EXE
PID:1836
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Roaming\svhost.exe
- Size 666KB
- SHA256 ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea
- MD5 8645a413332f840e925bac3cf19ceb57
- SHA1 87ca0cd2e1c04c2437d302f2864d1e68ea991677
- SHA512 ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e
- SSDEEP 12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAFC9+m:dd35lDbKDIwWUDyqS5omMC9+
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\svhost.exe
- Size 666KB
- SHA256 ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea
- MD5 8645a413332f840e925bac3cf19ceb57
- SHA1 87ca0cd2e1c04c2437d302f2864d1e68ea991677
- SHA512 ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e
- SSDEEP 12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAFC9+m:dd35lDbKDIwWUDyqS5omMC9+
- MD5 SHA1 SHA512 SSDEEP