Analysis
-
max time kernel
153s -
max time network
162s -
platform
windows10_x64 -
resource
win10-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
-
Target
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe
-
Size
115KB
-
MD5
68f898fbd1f714cedf6e1c1259848f61
-
SHA1
baa9fff6de84047a3fe0e3bc7ddb2921590386af
-
SHA256
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19
-
SHA512
759f2caa5c559db55902f98319ecb3f696b63f102cf259ebee2da76ef2216563d1d4af8358bb4eb49d7fad66220514dd1f94f7c4904ccc45d0b0d9db98e42e7d
Malware Config
Extracted
C:\83fv42-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/35DF19EC59F3696C
http://decryptor.cc/35DF19EC59F3696C
https://filehippo.com/download_tor_browser_for_windows/
Signatures
-
Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
-
Modifies extensions of user files 17 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exedescription ioc process File renamed C:\Users\Admin\Pictures\CompletePublish.png => \??\c:\users\admin\pictures\CompletePublish.png.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\MeasureProtect.raw => \??\c:\users\admin\pictures\MeasureProtect.raw.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\RemovePublish.crw => \??\c:\users\admin\pictures\RemovePublish.crw.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\WaitConnect.raw => \??\c:\users\admin\pictures\WaitConnect.raw.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\users\admin\pictures\MoveUse.tiff 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\users\admin\pictures\RestoreConfirm.tiff 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\NewMove.png => \??\c:\users\admin\pictures\NewMove.png.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\PingUse.png => \??\c:\users\admin\pictures\PingUse.png.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\ExpandRegister.tiff => \??\c:\users\admin\pictures\ExpandRegister.tiff.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\LimitGroup.crw => \??\c:\users\admin\pictures\LimitGroup.crw.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\MergeBlock.tiff => \??\c:\users\admin\pictures\MergeBlock.tiff.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\MoveUse.tiff => \??\c:\users\admin\pictures\MoveUse.tiff.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\RestoreConfirm.tiff => \??\c:\users\admin\pictures\RestoreConfirm.tiff.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\users\admin\pictures\ExpandRegister.tiff 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\users\admin\pictures\MergeBlock.tiff 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\FormatDebug.raw => \??\c:\users\admin\pictures\FormatDebug.raw.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File renamed C:\Users\Admin\Pictures\RepairUnlock.tif => \??\c:\users\admin\pictures\RepairUnlock.tif.83fv42 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe -
Enumerates connected drives 3 TTPs 25 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exedescription ioc process File opened (read-only) \??\I: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\O: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\Z: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\D: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\A: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\E: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\H: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\T: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\U: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\B: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\K: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\Q: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\X: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\Y: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\L: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\M: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\N: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\P: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\R: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\F: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\G: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\J: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\S: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\V: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened (read-only) \??\W: 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs
-
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\88surem6.bmp" 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe -
Drops file in Program Files directory 13 IoCs
Processes:
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exedescription ioc process File opened for modification \??\c:\program files\FindConvertFrom.clr 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\FormatUnprotect.contact 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\RenameSend.mpeg 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\UpdateUse.eps 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\CheckpointSend.xltm 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File created \??\c:\program files (x86)\83fv42-readme.txt 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\CloseUpdate.ps1xml 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\CompareWatch.ini 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\GroupConvertTo.jpeg 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\InstallFormat.mpg 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\SwitchStep.txt 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File opened for modification \??\c:\program files\UnpublishFind.asx 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe File created \??\c:\program files\83fv42-readme.txt 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exedescription pid process Token: SeTakeOwnershipPrivilege 3804 4967be7b7244b915b4ac0685327741d1de02aa745a9c5017d30be39396356b19.exe
Processes
-
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:3804