Analysis
- max time kernel
144s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system - submitted
20/12/2022, 05:40
Behavioral task
behavioral1
Sample
tmp.exe
Resource
win7-20221111-en
windows7-x64
16 signatures
150 seconds
Behavioral task
behavioral2
Sample
tmp.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
14 signatures
150 seconds
General
- Target tmp.exe
- Size 666KB
- Sample221220-gcwdvsbh51
- SHA256 6a973119a7c1cb0151cd94b34d24e963260a000da3e3a8df4b96e2430ffa409e
- MD5 c89dd8098bb565ffbca2b015fa3a862e
- SHA1 c7163968518d5a7d86c5fce07d05141c646ef6f6
- SHA512 02338017b14bc34eb9caf0486ffc4b2f1917e6e071571eb995171b410f13415b7af0789d6992759906a4f623f150d64c091b88e1012604d55680972a27a612f4
- SSDEEP 12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAIC9+m:dd35lDbKDIwWUDyqS5omlC9+
- 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 price and get decryption software.</p> <p> Contact us by email:<p> <h2>[email protected]</h2> </p>If you will get no answer within 24 hours contact us by our alternate emails:</p> <h2>[email protected]</h2> </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> 2235CA78AA915DBCFAD6F792746FABD1F1BDE35E91B2D8051881E63C10EA093CED8831E7ECA2D23F6FEDC8B2D0094DE639CCA6C438EED6DB08D55C1DAD719BA3<br>D9BCC3ED5CEBF614BD3E7E8D5744E8AE26A915BCA0394904CF226D5D8AA8EABFBE02E51EF91D53FDDDB3D677DCD5C38FE2822EFD7C8831176FAFF6F45643<br>96A24FD3EC9763A118A27C23C7F1E663B4E2095B60F673F2B0390E35AC6E8AA46E78FD576C05233A5652C438E9DB6B63AE6E45D150BC55F810C74D47DE2E<br>4B8D02ABB9E3CA7AAB12B4E8385160864EF72741E1010D9B0C98B297FEE588937AEDAF0474DC29E899361D35433FDBA80AED64CDA5DCB7B08B61EAE2C9E4<br>C745BA394A5E94AC1584D557C070B0CBEA37F073F9CD1CC9B34D412A70836D0066988AA29E46A2F33A3E481D3A49398D4216DDFC0AC30DB4B8AADFF557B3<br>76AC67F3CA62BF80C5B70714FA12F2984FDE43E41B2857E87B0B729FF6CE88F6CB8B56B097D1CA6B02C2E9C5E8FD439B66BE06E15D5FD925FA22BDC41280<br>F679CA8EB4865EDE1F7F86D8E9B4FA9C99D9EAEBA832360372BD132D1629E5E0C1334A67E3C01F5C7DDE73C6DC79D81DD3857262B2C3027621ABA3ABFA3F<br>6DF15A2B117975B939E2172EEC0564C5380255F773AF4FA0A5159DC1683711ED6C277A2063AD6939F28D1F30D3DAD4A9AFB1D37ED1877611515463AD2BFE<br>E6808FE289DDB7CDB184A19B7F32
Emails
-
<h2>[email protected]</h2>
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<h2>[email protected]</h2>
Signatures
- MedusaLocker
Ransomware with several variants first seen in September 2019.
- MedusaLocker payload 2 IoCs
resource yara_rule behavioral2/files/0x000c000000022f4b-135.dat family_medusalocker behavioral2/files/0x000c000000022f4b-136.dat family_medusalocker -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" tmp.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" tmp.exe - Executes dropped EXE 1 IoCs
pid Process 1000 svhost.exe - Modifies extensions of user files 7 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\SwitchFind.tif => C:\Users\Admin\Pictures\SwitchFind.tif.bulwark7 tmp.exe File renamed C:\Users\Admin\Pictures\SwitchInstall.crw => C:\Users\Admin\Pictures\SwitchInstall.crw.bulwark7 tmp.exe File renamed C:\Users\Admin\Pictures\UninstallSave.raw => C:\Users\Admin\Pictures\UninstallSave.raw.bulwark7 tmp.exe File renamed C:\Users\Admin\Pictures\AddConnect.tif => C:\Users\Admin\Pictures\AddConnect.tif.bulwark7 tmp.exe File renamed C:\Users\Admin\Pictures\CompleteHide.raw => C:\Users\Admin\Pictures\CompleteHide.raw.bulwark7 tmp.exe File opened for modification C:\Users\Admin\Pictures\DenyInitialize.tiff tmp.exe File renamed C:\Users\Admin\Pictures\DenyInitialize.tiff => C:\Users\Admin\Pictures\DenyInitialize.tiff.bulwark7 tmp.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" tmp.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 tmp.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) \??\U: tmp.exe File opened (read-only) \??\W: tmp.exe File opened (read-only) \??\E: tmp.exe File opened (read-only) \??\F: tmp.exe File opened (read-only) \??\H: tmp.exe File opened (read-only) \??\J: tmp.exe File opened (read-only) \??\M: tmp.exe File opened (read-only) \??\Z: tmp.exe File opened (read-only) \??\B: tmp.exe File opened (read-only) \??\G: tmp.exe File opened (read-only) \??\L: tmp.exe File opened (read-only) \??\P: tmp.exe File opened (read-only) \??\X: tmp.exe File opened (read-only) \??\T: tmp.exe File opened (read-only) \??\V: tmp.exe File opened (read-only) \??\A: tmp.exe File opened (read-only) \??\K: tmp.exe File opened (read-only) \??\N: tmp.exe File opened (read-only) \??\O: tmp.exe File opened (read-only) \??\R: tmp.exe File opened (read-only) \??\I: tmp.exe File opened (read-only) \??\Q: tmp.exe File opened (read-only) \??\S: tmp.exe File opened (read-only) \??\Y: tmp.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 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe 4748 tmp.exe - Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 4156 wmic.exe Token: SeSecurityPrivilege 4156 wmic.exe Token: SeTakeOwnershipPrivilege 4156 wmic.exe Token: SeLoadDriverPrivilege 4156 wmic.exe Token: SeSystemProfilePrivilege 4156 wmic.exe Token: SeSystemtimePrivilege 4156 wmic.exe Token: SeProfSingleProcessPrivilege 4156 wmic.exe Token: SeIncBasePriorityPrivilege 4156 wmic.exe Token: SeCreatePagefilePrivilege 4156 wmic.exe Token: SeBackupPrivilege 4156 wmic.exe Token: SeRestorePrivilege 4156 wmic.exe Token: SeShutdownPrivilege 4156 wmic.exe Token: SeDebugPrivilege 4156 wmic.exe Token: SeSystemEnvironmentPrivilege 4156 wmic.exe Token: SeRemoteShutdownPrivilege 4156 wmic.exe Token: SeUndockPrivilege 4156 wmic.exe Token: SeManageVolumePrivilege 4156 wmic.exe Token: 33 4156 wmic.exe Token: 34 4156 wmic.exe Token: 35 4156 wmic.exe Token: 36 4156 wmic.exe Token: SeIncreaseQuotaPrivilege 2412 wmic.exe Token: SeSecurityPrivilege 2412 wmic.exe Token: SeTakeOwnershipPrivilege 2412 wmic.exe Token: SeLoadDriverPrivilege 2412 wmic.exe Token: SeSystemProfilePrivilege 2412 wmic.exe Token: SeSystemtimePrivilege 2412 wmic.exe Token: SeProfSingleProcessPrivilege 2412 wmic.exe Token: SeIncBasePriorityPrivilege 2412 wmic.exe Token: SeCreatePagefilePrivilege 2412 wmic.exe Token: SeBackupPrivilege 2412 wmic.exe Token: SeRestorePrivilege 2412 wmic.exe Token: SeShutdownPrivilege 2412 wmic.exe Token: SeDebugPrivilege 2412 wmic.exe Token: SeSystemEnvironmentPrivilege 2412 wmic.exe Token: SeRemoteShutdownPrivilege 2412 wmic.exe Token: SeUndockPrivilege 2412 wmic.exe Token: SeManageVolumePrivilege 2412 wmic.exe Token: 33 2412 wmic.exe Token: 34 2412 wmic.exe Token: 35 2412 wmic.exe Token: 36 2412 wmic.exe Token: SeIncreaseQuotaPrivilege 4560 wmic.exe Token: SeSecurityPrivilege 4560 wmic.exe Token: SeTakeOwnershipPrivilege 4560 wmic.exe Token: SeLoadDriverPrivilege 4560 wmic.exe Token: SeSystemProfilePrivilege 4560 wmic.exe Token: SeSystemtimePrivilege 4560 wmic.exe Token: SeProfSingleProcessPrivilege 4560 wmic.exe Token: SeIncBasePriorityPrivilege 4560 wmic.exe Token: SeCreatePagefilePrivilege 4560 wmic.exe Token: SeBackupPrivilege 4560 wmic.exe Token: SeRestorePrivilege 4560 wmic.exe Token: SeShutdownPrivilege 4560 wmic.exe Token: SeDebugPrivilege 4560 wmic.exe Token: SeSystemEnvironmentPrivilege 4560 wmic.exe Token: SeRemoteShutdownPrivilege 4560 wmic.exe Token: SeUndockPrivilege 4560 wmic.exe Token: SeManageVolumePrivilege 4560 wmic.exe Token: 33 4560 wmic.exe Token: 34 4560 wmic.exe Token: 35 4560 wmic.exe Token: 36 4560 wmic.exe - Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 4748 wrote to memory of 4156 4748 tmp.exe 81 PID 4748 wrote to memory of 4156 4748 tmp.exe 81 PID 4748 wrote to memory of 4156 4748 tmp.exe 81 PID 4748 wrote to memory of 2412 4748 tmp.exe 83 PID 4748 wrote to memory of 2412 4748 tmp.exe 83 PID 4748 wrote to memory of 2412 4748 tmp.exe 83 PID 4748 wrote to memory of 4560 4748 tmp.exe 85 PID 4748 wrote to memory of 4560 4748 tmp.exe 85 PID 4748 wrote to memory of 4560 4748 tmp.exe 85 - System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" tmp.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" tmp.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" tmp.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.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:4748 -
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4156
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2412
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4560
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C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe1⤵
- Executes dropped EXE
PID:1000
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\svhost.exe
- Size 666KB
- SHA256 6a973119a7c1cb0151cd94b34d24e963260a000da3e3a8df4b96e2430ffa409e
- MD5 c89dd8098bb565ffbca2b015fa3a862e
- SHA1 c7163968518d5a7d86c5fce07d05141c646ef6f6
- SHA512 02338017b14bc34eb9caf0486ffc4b2f1917e6e071571eb995171b410f13415b7af0789d6992759906a4f623f150d64c091b88e1012604d55680972a27a612f4
- SSDEEP 12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAIC9+m:dd35lDbKDIwWUDyqS5omlC9+
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\svhost.exe
- Size 666KB
- SHA256 6a973119a7c1cb0151cd94b34d24e963260a000da3e3a8df4b96e2430ffa409e
- MD5 c89dd8098bb565ffbca2b015fa3a862e
- SHA1 c7163968518d5a7d86c5fce07d05141c646ef6f6
- SHA512 02338017b14bc34eb9caf0486ffc4b2f1917e6e071571eb995171b410f13415b7af0789d6992759906a4f623f150d64c091b88e1012604d55680972a27a612f4
- SSDEEP 12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAIC9+m:dd35lDbKDIwWUDyqS5omlC9+
- MD5 SHA1 SHA512 SSDEEP