Analysis
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max time kernel
140s -
max time network
155s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
24-01-2022 01:01
Static task
static1
Behavioral task
behavioral1
Sample
cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe
Resource
win10-en-20211208
General
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Target
cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe
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Size
115KB
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MD5
fbf8e910f9480d64e8ff6ecf4b10ef4b
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SHA1
e6b32975acb2cc5230dd4f6ce6f243293fd984fa
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SHA256
cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b
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SHA512
3eccc2920d8672c1a9158bf7b72ae669dc59fe6404da0938cbc8ad0e7a27be897a42a655cadae917c45279406deaa85951d067eedb2645e06b5f77b78f57177b
Malware Config
Extracted
C:\3floi-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/63D867C4951A4621
http://decryptor.cc/63D867C4951A4621
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 7 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exedescription ioc process File renamed C:\Users\Admin\Pictures\ExitTrace.png => \??\c:\users\admin\pictures\ExitTrace.png.3floi cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File renamed C:\Users\Admin\Pictures\ExportSearch.tiff => \??\c:\users\admin\pictures\ExportSearch.tiff.3floi cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File renamed C:\Users\Admin\Pictures\InstallUnregister.tiff => \??\c:\users\admin\pictures\InstallUnregister.tiff.3floi cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File renamed C:\Users\Admin\Pictures\SelectSearch.tif => \??\c:\users\admin\pictures\SelectSearch.tif.3floi cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File renamed C:\Users\Admin\Pictures\WaitExit.raw => \??\c:\users\admin\pictures\WaitExit.raw.3floi cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\users\admin\pictures\ExportSearch.tiff cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\users\admin\pictures\InstallUnregister.tiff cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe -
Enumerates connected drives 3 TTPs 25 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exedescription ioc process File opened (read-only) \??\W: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\J: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\R: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\M: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\U: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\A: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\E: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\N: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\P: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\Q: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\T: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\V: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\D: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\G: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\I: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\H: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\K: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\L: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\O: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\S: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\X: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\B: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\F: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\Y: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened (read-only) \??\Z: cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exedescription 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\\z1kjaq275.bmp" cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe -
Drops file in Program Files directory 31 IoCs
Processes:
cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exedescription ioc process File opened for modification \??\c:\program files\InstallUnblock.mp3 cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\RequestPublish.html cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\StartCopy.gif cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\EditPing.avi cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\ProtectGroup.zip cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\v3.5\3floi-readme.txt cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File created \??\c:\program files\3floi-readme.txt cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\ExportApprove.php cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\UnregisterSelect.pps cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\JoinOpen.ppt cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\NewStart.ppsm cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\SearchCompress.docm cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\UnprotectFormat.svg cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\SearchSkip.odt cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\v3.5\desktop\3floi-readme.txt cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File created \??\c:\program files (x86)\3floi-readme.txt cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\CloseTrace.mid cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\CompleteUnblock.png cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\ReadCompress.jpeg cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\3floi-readme.txt cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\CheckpointLimit.avi cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\DenyCompress.gif cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\FindUndo.clr cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\MoveSave.001 cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\OutConvertTo.rmi cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\TraceGrant.scf cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\UninstallUndo.xhtml cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\DisableLimit.wps cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\MeasureAdd.vbs cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\OutImport.doc cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe File opened for modification \??\c:\program files\UndoPublish.cr2 cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exedescription pid process Token: SeTakeOwnershipPrivilege 1592 cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.exe"C:\Users\Admin\AppData\Local\Temp\cec23c13c52a39c8715ee2ed7878f8aa9452e609df1d469ef7f0dec55736645b.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:1592