Analysis
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max time kernel
135s -
max time network
176s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
24-01-2022 02:09
Static task
static1
Behavioral task
behavioral1
Sample
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe
Resource
win10-en-20211208
General
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Target
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe
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Size
115KB
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MD5
68f898fbd1f714cedf6e1c1259848f61
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SHA1
baa9fff6de84047a3fe0e3bc7ddb2921590386af
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SHA256
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19
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SHA512
759f2caa5c559db55902f98319ecb3f696b63f102cf259ebee2da76ef2216563d1d4af8358bb4eb49d7fad66220514dd1f94f7c4904ccc45d0b0d9db98e42e7d
Malware Config
Extracted
C:\3nyt45ek2-readme.txt
ryuk
https://www.coveware.com/blog/2019/7/15/ransomware-amounts-rise-3x-in-q2-as-ryuk-amp-sodinokibi-spread
http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/3BCCAF94A9623AAD
http://decryptor.cc/3BCCAF94A9623AAD
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 6 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\SendComplete.png => \??\c:\users\admin\pictures\SendComplete.png.3nyt45ek2 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\ConvertFromStop.raw => \??\c:\users\admin\pictures\ConvertFromStop.raw.3nyt45ek2 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\InitializeProtect.crw => \??\c:\users\admin\pictures\InitializeProtect.crw.3nyt45ek2 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\InstallDisconnect.raw => \??\c:\users\admin\pictures\InstallDisconnect.raw.3nyt45ek2 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\RequestDisable.tif => \??\c:\users\admin\pictures\RequestDisable.tif.3nyt45ek2 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\SearchGrant.tif => \??\c:\users\admin\pictures\SearchGrant.tif.3nyt45ek2 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe -
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) \??\Y: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\F: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\K: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\N: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\O: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\Q: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\S: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\Z: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\D: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\G: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\H: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\L: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\R: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\T: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\W: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\A: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\B: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\J: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\M: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\X: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\E: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\I: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\P: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\U: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\V: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\slp8yx6.bmp" 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe -
Drops file in Program Files directory 19 IoCs
description ioc Process File opened for modification \??\c:\program files\InvokeConnect.vst 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\TraceDisconnect.aiff 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\TraceEdit.mpeg2 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\UnlockWrite.TTS 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File created \??\c:\program files\3nyt45ek2-readme.txt 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\ClearSwitch.sql 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\3nyt45ek2-readme.txt 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\v3.5\3nyt45ek2-readme.txt 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File created \??\c:\program files (x86)\3nyt45ek2-readme.txt 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\OpenExport.3gpp 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\RedoUndo.asp 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\RequestRestart.001 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\SendJoin.odt 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\MountUpdate.kix 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\PublishTrace.fon 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\ResolveUnlock.dwg 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\v3.5\desktop\3nyt45ek2-readme.txt 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\ConvertToSuspend.css 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\DebugDeny.ttc 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeTakeOwnershipPrivilege 1776 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe"C:\Users\Admin\AppData\Local\Temp\4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe"1⤵
- Modifies extensions of user files
- Enumerates connected drives
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:1776