Analysis
- max time kernel
159s - max time network
160s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system - submitted
06/01/2023, 19:39
Behavioral task
behavioral1
Sample
64_MEcip5.exe
Resource
win7-20220812-en
windows7-x64
16 signatures
150 seconds
Behavioral task
behavioral2
Sample
64_MEcip5.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
14 signatures
150 seconds
General
- Target 64_MEcip5.exe
- Size 666KB
- Sample230106-yddzmsbe36
- SHA256 860154eb48c722136e8c84b14a528be602aa6bc3de77523ea4d9490f280f69d7
- MD5 1a018c68582e13d7f51aa58f87e2ed50
- SHA1 9568f4a2959eda46af35c5d18c190f0d85047ac3
- SHA512 a6775058f5ee5adc24b1f3fb6dbd29d9b0315e17a7061679bcda146a377912cf46292456435af27fd7790b6a8cc83025c4964c6526cdf1528cd55e8d68c1b7c9
- SSDEEP 12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAZC9+m:dd35lDbKDIwWUDyqS5omIC9+
- 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: 088F193D401815569175A22C362909A94026FC54A9879239B7ECDF52A50DCDACCBAB1B982192CEBBF431F0CF1A8FFBABD8565AFDAC677BB9BCAFB55D8A44737E<br>0A1C4A7F62C03F0DBF8656141A661E78EF6ADAD3A2702484F2FA1015F74D5B0AF9466631A80104E3E23AF6DA90B0130E86AF4092A3F37CD6D4D978199290<br>06A4E1B89416A0EEC869F64926B1266AB68C38E20C497B3894275F0F926C81135E1D28C167EADC4A8CCB1AC1493EDE9C30E57B07E1293246B60D921DA085<br>C2FDADCE593E7DAD72A59A2BAAF8E176B02B89D7F58556D1A8420B050AC88E6487052DF555CDBF97D820E704CEEB4E9B4BF4FBF4854C8ADC4560C4A82FAB<br>63FB451B7C419A4D513DFCEB9C7C3619A77B227FB5D5212B7BAA3EF93993FC2108D281F47E3334B8370E3EF88F5A9C8FA006932C5E485449CE0EFF5FC137<br>4272C7ACC6F52C5CF278C9D2E72E53110E9945CC4EFAF51D41C203232F5AF0E0365DB05FA92793A956BADEBE1D49FA92E7941A73EE2333B6776E43C979B8<br>CA92CF44FDA603673A92CF815B2443DE534FB6714B8C13ACF54410D355310788B305C61296075542C079E77DCD1CA8F2D317D3EB9E39151AC1AD68389F5B<br>DCB60F70843906E394153686595C575641806366CEF01B228C8D72ECD82FB0A8B3B748730208C8452EE2A62124E8CFFF13D56CDFD017FA7174C2CDA41F9B<br>8194E1868B83FDC5AECF58A9781F
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/0x000b000000022f28-135.dat family_medusalocker behavioral2/files/0x000b000000022f28-136.dat family_medusalocker -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip5.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip5.exe - Executes dropped EXE 1 IoCs
pid Process 3092 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\CopyImport.tif => C:\Users\Admin\Pictures\CopyImport.tif.cipher5 64_MEcip5.exe File renamed C:\Users\Admin\Pictures\WaitPush.raw => C:\Users\Admin\Pictures\WaitPush.raw.cipher5 64_MEcip5.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_MEcip5.exe - Drops desktop.ini file(s) 1 IoCs
description ioc Process File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-2891029575-1462575-1165213807-1000\desktop.ini 64_MEcip5.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) \??\A: 64_MEcip5.exe File opened (read-only) \??\G: 64_MEcip5.exe File opened (read-only) \??\L: 64_MEcip5.exe File opened (read-only) \??\N: 64_MEcip5.exe File opened (read-only) \??\S: 64_MEcip5.exe File opened (read-only) \??\W: 64_MEcip5.exe File opened (read-only) \??\Y: 64_MEcip5.exe File opened (read-only) \??\Z: 64_MEcip5.exe File opened (read-only) \??\E: 64_MEcip5.exe File opened (read-only) \??\I: 64_MEcip5.exe File opened (read-only) \??\M: 64_MEcip5.exe File opened (read-only) \??\Q: 64_MEcip5.exe File opened (read-only) \??\R: 64_MEcip5.exe File opened (read-only) \??\B: 64_MEcip5.exe File opened (read-only) \??\H: 64_MEcip5.exe File opened (read-only) \??\K: 64_MEcip5.exe File opened (read-only) \??\T: 64_MEcip5.exe File opened (read-only) \??\V: 64_MEcip5.exe File opened (read-only) \??\X: 64_MEcip5.exe File opened (read-only) \??\F: 64_MEcip5.exe File opened (read-only) \??\J: 64_MEcip5.exe File opened (read-only) \??\O: 64_MEcip5.exe File opened (read-only) \??\P: 64_MEcip5.exe File opened (read-only) \??\U: 64_MEcip5.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 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe 4720 64_MEcip5.exe - Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 1588 wmic.exe Token: SeSecurityPrivilege 1588 wmic.exe Token: SeTakeOwnershipPrivilege 1588 wmic.exe Token: SeLoadDriverPrivilege 1588 wmic.exe Token: SeSystemProfilePrivilege 1588 wmic.exe Token: SeSystemtimePrivilege 1588 wmic.exe Token: SeProfSingleProcessPrivilege 1588 wmic.exe Token: SeIncBasePriorityPrivilege 1588 wmic.exe Token: SeCreatePagefilePrivilege 1588 wmic.exe Token: SeBackupPrivilege 1588 wmic.exe Token: SeRestorePrivilege 1588 wmic.exe Token: SeShutdownPrivilege 1588 wmic.exe Token: SeDebugPrivilege 1588 wmic.exe Token: SeSystemEnvironmentPrivilege 1588 wmic.exe Token: SeRemoteShutdownPrivilege 1588 wmic.exe Token: SeUndockPrivilege 1588 wmic.exe Token: SeManageVolumePrivilege 1588 wmic.exe Token: 33 1588 wmic.exe Token: 34 1588 wmic.exe Token: 35 1588 wmic.exe Token: 36 1588 wmic.exe Token: SeIncreaseQuotaPrivilege 1440 wmic.exe Token: SeSecurityPrivilege 1440 wmic.exe Token: SeTakeOwnershipPrivilege 1440 wmic.exe Token: SeLoadDriverPrivilege 1440 wmic.exe Token: SeSystemProfilePrivilege 1440 wmic.exe Token: SeSystemtimePrivilege 1440 wmic.exe Token: SeProfSingleProcessPrivilege 1440 wmic.exe Token: SeIncBasePriorityPrivilege 1440 wmic.exe Token: SeCreatePagefilePrivilege 1440 wmic.exe Token: SeBackupPrivilege 1440 wmic.exe Token: SeRestorePrivilege 1440 wmic.exe Token: SeShutdownPrivilege 1440 wmic.exe Token: SeDebugPrivilege 1440 wmic.exe Token: SeSystemEnvironmentPrivilege 1440 wmic.exe Token: SeRemoteShutdownPrivilege 1440 wmic.exe Token: SeUndockPrivilege 1440 wmic.exe Token: SeManageVolumePrivilege 1440 wmic.exe Token: 33 1440 wmic.exe Token: 34 1440 wmic.exe Token: 35 1440 wmic.exe Token: 36 1440 wmic.exe Token: SeIncreaseQuotaPrivilege 3764 wmic.exe Token: SeSecurityPrivilege 3764 wmic.exe Token: SeTakeOwnershipPrivilege 3764 wmic.exe Token: SeLoadDriverPrivilege 3764 wmic.exe Token: SeSystemProfilePrivilege 3764 wmic.exe Token: SeSystemtimePrivilege 3764 wmic.exe Token: SeProfSingleProcessPrivilege 3764 wmic.exe Token: SeIncBasePriorityPrivilege 3764 wmic.exe Token: SeCreatePagefilePrivilege 3764 wmic.exe Token: SeBackupPrivilege 3764 wmic.exe Token: SeRestorePrivilege 3764 wmic.exe Token: SeShutdownPrivilege 3764 wmic.exe Token: SeDebugPrivilege 3764 wmic.exe Token: SeSystemEnvironmentPrivilege 3764 wmic.exe Token: SeRemoteShutdownPrivilege 3764 wmic.exe Token: SeUndockPrivilege 3764 wmic.exe Token: SeManageVolumePrivilege 3764 wmic.exe Token: 33 3764 wmic.exe Token: 34 3764 wmic.exe Token: 35 3764 wmic.exe Token: 36 3764 wmic.exe - Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 4720 wrote to memory of 1588 4720 64_MEcip5.exe 82 PID 4720 wrote to memory of 1588 4720 64_MEcip5.exe 82 PID 4720 wrote to memory of 1588 4720 64_MEcip5.exe 82 PID 4720 wrote to memory of 1440 4720 64_MEcip5.exe 85 PID 4720 wrote to memory of 1440 4720 64_MEcip5.exe 85 PID 4720 wrote to memory of 1440 4720 64_MEcip5.exe 85 PID 4720 wrote to memory of 3764 4720 64_MEcip5.exe 87 PID 4720 wrote to memory of 3764 4720 64_MEcip5.exe 87 PID 4720 wrote to memory of 3764 4720 64_MEcip5.exe 87 - System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip5.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" 64_MEcip5.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip5.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\64_MEcip5.exe"C:\Users\Admin\AppData\Local\Temp\64_MEcip5.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:4720 -
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1588
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1440
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:3764
-
-
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe1⤵
- Executes dropped EXE
PID:3092
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Roaming\svhost.exe
- Size 666KB
- SHA256 860154eb48c722136e8c84b14a528be602aa6bc3de77523ea4d9490f280f69d7
- MD5 1a018c68582e13d7f51aa58f87e2ed50
- SHA1 9568f4a2959eda46af35c5d18c190f0d85047ac3
- SHA512 a6775058f5ee5adc24b1f3fb6dbd29d9b0315e17a7061679bcda146a377912cf46292456435af27fd7790b6a8cc83025c4964c6526cdf1528cd55e8d68c1b7c9
- SSDEEP 12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAZC9+m:dd35lDbKDIwWUDyqS5omIC9+
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\svhost.exe
- Size 666KB
- SHA256 860154eb48c722136e8c84b14a528be602aa6bc3de77523ea4d9490f280f69d7
- MD5 1a018c68582e13d7f51aa58f87e2ed50
- SHA1 9568f4a2959eda46af35c5d18c190f0d85047ac3
- SHA512 a6775058f5ee5adc24b1f3fb6dbd29d9b0315e17a7061679bcda146a377912cf46292456435af27fd7790b6a8cc83025c4964c6526cdf1528cd55e8d68c1b7c9
- SSDEEP 12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAZC9+m:dd35lDbKDIwWUDyqS5omIC9+
- MD5 SHA1 SHA512 SSDEEP