Analysis
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max time kernel
4294183s -
max time network
145s -
platform
windows7_x64 -
resource
win7-20220223-en -
submitted
06-03-2022 04:18
Static task
static1
Behavioral task
behavioral1
Sample
937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe
Resource
win7-20220223-en
Behavioral task
behavioral2
Sample
937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe
Resource
win10v2004-en-20220112
General
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Target
937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe
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Size
118KB
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MD5
0237b989a2baee892313244ad6376153
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SHA1
8677b1fa138f908fc791426f681995a1ca462ba9
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SHA256
937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e
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SHA512
88ea1dfb64da80834619c4039431cd1051fb00a9f081ff4697b05636f9e7aab83d6351a20437e26c40d7bfb3dc281e5cf55c3fb6b599410902c3c96aca9b2609
Malware Config
Extracted
C:\7i376-readme.txt
ryuk
http://dnpscnbaix6nkwvystl3yxglz7nteicqrou3t75tpcc5532cztc46qyd.onion
https://www.coveware.com/blog/2019/7/15/ransomware-amounts-rise-3x-in-q2-as-ryuk-amp-sodinokibi-spread
http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/0273E1CADF203DED
http://decryptor.cc/0273E1CADF203DED
https://filehippo.com/download_tor_browser_for_windows/
Signatures
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Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
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Modifies extensions of user files 4 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\SaveSplit.png => \??\c:\users\admin\pictures\SaveSplit.png.7i376 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File renamed C:\Users\Admin\Pictures\SkipDeny.crw => \??\c:\users\admin\pictures\SkipDeny.crw.7i376 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File renamed C:\Users\Admin\Pictures\ResumeDisable.png => \??\c:\users\admin\pictures\ResumeDisable.png.7i376 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File renamed C:\Users\Admin\Pictures\ResumeApprove.png => \??\c:\users\admin\pictures\ResumeApprove.png.7i376 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.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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Enumerates connected drives 3 TTPs 25 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\X: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\J: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\N: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\P: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\S: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\T: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\M: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\R: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\U: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\A: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\E: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\H: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\I: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\L: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\V: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\G: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\K: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\O: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\Q: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\Y: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\B: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\F: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\W: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\Z: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened (read-only) \??\D: 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File opened for modification C:\Windows\System32\CatRoot2\dberr.txt 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1405931862-909307831-4085185274-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\86d40.bmp" 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe -
Drops file in Program Files directory 12 IoCs
description ioc Process File created \??\c:\program files (x86)\microsoft sql server compact edition\7i376-readme.txt 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened for modification \??\c:\program files\BlockHide.mpeg3 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened for modification \??\c:\program files\CompareExit.asx 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened for modification \??\c:\program files\CopyRepair.ppsm 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened for modification \??\c:\program files\ExpandConfirm.pcx 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened for modification \??\c:\program files\ExpandWrite.vsdm 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened for modification \??\c:\program files\PublishBlock.TS 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened for modification \??\c:\program files\SkipCopy.tiff 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened for modification \??\c:\program files\SuspendSet.rar 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File opened for modification \??\c:\program files\UninstallRestart.jpeg 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\v3.5\7i376-readme.txt 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\v3.5\desktop\7i376-readme.txt 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe -
Suspicious use of AdjustPrivilegeToken 13 IoCs
description pid Process Token: SeDebugPrivilege 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Token: SeTakeOwnershipPrivilege 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Token: SeTakeOwnershipPrivilege 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Token: SeDebugPrivilege 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Token: SeTakeOwnershipPrivilege 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Token: SeDebugPrivilege 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Token: SeTakeOwnershipPrivilege 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Token: SeDebugPrivilege 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Token: SeTakeOwnershipPrivilege 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Token: SeDebugPrivilege 1088 937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe Token: SeBackupPrivilege 652 vssvc.exe Token: SeRestorePrivilege 652 vssvc.exe Token: SeAuditPrivilege 652 vssvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe"C:\Users\Admin\AppData\Local\Temp\937829f7defd9b3e80bb36d82f2e3421c80ec39cb858756dc647547635821d7e.exe"1⤵
- Modifies extensions of user files
- Enumerates connected drives
- Drops file in System32 directory
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1088
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C:\Windows\system32\wbem\unsecapp.exeC:\Windows\system32\wbem\unsecapp.exe -Embedding1⤵PID:524
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:652