d55f983c994caa160ec63a59f6b4250fe67fb3e8c43a388aec60a4a6978e9f1e

General

Target
revil.exe
Size 890KB
Sample210703-97x2n2g7ps
SHA256 d55f983c994caa160ec63a59f6b4250fe67fb3e8c43a388aec60a4a6978e9f1e
MD5 561cffbaba71a6e8cc1cdceda990ead4
SHA1 5162f14d75e96edb914d1756349d6e11583db0b0
SHA512 09149b9825db2c9e6d2ec6665abc64b0b7aaafaa47c921c5bf0062cd7bedd1fc64cf54646a098f45fc4b930f5fbecee586fe839950c9135f64ea722b00baa50e
MD5 SHA1 SHA512

Score

10^/10

evasion ransomware

Malware Config

Extracted

Path

C:\csruj-readme.txt

Ransom Note

---=== Welcome. Again. ===--- [-] Whats HapPen? [-] Your files are encrypted, and currently unavailable. You can check it: all files on your system has extension csruj. By the way, everything is possible to recover (restore), but you need to follow our instructions. Otherwise, you cant return your data (NEVER). [+] What guarantees? [+] Its just a business. We absolutely do not care about you and your deals, except getting benefits. If we do not do our work and liabilities - nobody will not cooperate with us. Its not in our interests. To check the ability of returning files, You should go to our website. There you can decrypt one file for free. That is our guarantee. If you will not cooperate with our service - for us, its does not matter. But you will lose your time and data, cause just we have the private key. In practice - time is much more valuable than money. [+] How to get access on website? [+] You have two ways: 1) [Recommended] Using a TOR browser! a) Download and install TOR browser from this site: https://torproject.org/ b) Open our website: http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/66060A2A6152521E 2) If TOR blocked in your country, try to use VPN! But you can use our secondary website. For this: a) Open your any browser (Chrome, Firefox, Opera, IE, Edge) b) Open our secondary website: http://decoder.re/66060A2A6152521E Warning: secondary website can be blocked, thats why first variant much better and more available. When you open our website, put the following data in the input form: Key: dJbLfiWYv76q/DPGpzpR2pm796WiMb5iya06dL9Wdpgpm4t1Vr8e/jWP2pVc52fq SrvCHsSU1Pj4/inZ6vHU/ThO9F3liQlNcbdfG3N4+L7jQ4yQP6jSXzaZwJOWupCZ CLOIZ5dTgk3pUO08tHP1iHtmIH9mbHqiH1kFoZTLNvslJib0Ar1Xnf8rmtVB5hjN 9o0dvOx4RFslmI5eqJ3P8Pgizz4i+dEX0y4Edl14P/y/EFhW9V/BUwtIJZ/ov2+4 Ms77cqVZwVFVGcUPXARqyw9FJh68g1sv2lD38d1cxIs9/ARJOD9RtoUd02kqsEvz UmiXs7yknjhqAgZ+oCK93gFKiEr6DJiLekLpF+XFT0SoF6g1xIVcNNsqVd/NP9EJ KL46oCaLxhRr4phgPFgy/qtncxK88Q4xrteC+xb8VKEEuTYHmFuthMGlt9dzGfmU 2WCE5+X3Xjh21OVOMMdLcVjH3SpVZAVy2WIdk3P8sxh198i5xoQtNu0sC7jGhf2L C+uhsFSFh5E5oLs4uvR1pQ+ycCh2KHWlqHBMgl/i4SHf2lsPvsJZFD+I7JcDU+BO pVD9gXGdiwAJr/k07R2L6c3c5XA7mWJVUMiLYhLdpsEb0EodDe6V+hbUW2lsd5MB qN7A/OKTCtIz+1bWJXA4kbbaiA+7nn7XSJO83RMHAoqcCoXAZMF8yNpBYlgiNlIZ BVi436uZCe0+N03O5TL1ia2AAB0pg276O2Tb4dEl4AVgq1oUz8kOnCLFpTtdatFQ 2bKgnI6ogDW2j64JI+VKx1lg/BZlLHr5SkJecBHlcz0C394B8djclLtmSrv8PaVh ueefCORclBfirxbDOdpoVI4yRPqd8mLgK+NQFt8PmdR3axLRXQmKtytT9yVV1Rid LN9AxLqEGdvWQljMhrrT0YnsUUZvp1bN3NoDQaZDsGtvvT+ePhTJ06wKNtnq/Buk h10HzaP5fw+cqLw613iMqMDvEZweSefgAOzWBN9pIg0nYNe37LzcGhVq0g+umuRk qN8+yVZYdGg7BN9pNUFld6MzG9Dp4zeuzKiOClYjIhQkLsflMqTXGeLQZcY5nO3V 5eWcsJPLjKQf972KJ1qC5Jutqx6r7kHr3bvOUj2ysvbdbuNJ9zsuA9cErWph5PmR agMv3Tjqqc7IvAM+0XUbTrcnPMvpqBky0+Qev7KCzkHoXwjRaVUSD73aBG/qF0nd GEqOxL9KRIyH4QUR/iZhBr+tx9CZtM7S5CpbebU7KjBvHx5GvYo2uFIFVDXFoX0R 20G+wg== ----------------------------------------------------------------------------------------- !!! DANGER !!! DON'T try to change files by yourself, DON'T use any third party software for restoring your data or antivirus solutions - its may entail damage of the private key and, as result, The Loss all data. !!! !!! !!! ONE MORE TIME: Its in your interests to get your files back. From our side, we (the best specialists) make everything for restoring, but please should not interfere. !!! !!! !!!

URLs

http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/66060A2A6152521E
http://decoder.re/66060A2A6152521E

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4832	MsMpEng.exe

Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

Modifies extensions of user files 11 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\MoveOpen.raw => \??\c:\users\admin\pictures\MoveOpen.raw.csruj	MsMpEng.exe
File renamed	C:\Users\Admin\Pictures\ResetCompress.png => \??\c:\users\admin\pictures\ResetCompress.png.csruj	MsMpEng.exe
File renamed	C:\Users\Admin\Pictures\JoinPush.crw => \??\c:\users\admin\pictures\JoinPush.crw.csruj	MsMpEng.exe
File renamed	C:\Users\Admin\Pictures\DisableRegister.tif => \??\c:\users\admin\pictures\DisableRegister.tif.csruj	MsMpEng.exe
File renamed	C:\Users\Admin\Pictures\DismountFind.png => \??\c:\users\admin\pictures\DismountFind.png.csruj	MsMpEng.exe
File renamed	C:\Users\Admin\Pictures\EnterCopy.crw => \??\c:\users\admin\pictures\EnterCopy.crw.csruj	MsMpEng.exe
File renamed	C:\Users\Admin\Pictures\HideGrant.raw => \??\c:\users\admin\pictures\HideGrant.raw.csruj	MsMpEng.exe
File renamed	C:\Users\Admin\Pictures\LimitPing.png => \??\c:\users\admin\pictures\LimitPing.png.csruj	MsMpEng.exe
File renamed	C:\Users\Admin\Pictures\ResizeWrite.raw => \??\c:\users\admin\pictures\ResizeWrite.raw.csruj	MsMpEng.exe
File renamed	C:\Users\Admin\Pictures\UseOut.tif => \??\c:\users\admin\pictures\UseOut.tif.csruj	MsMpEng.exe
File renamed	C:\Users\Admin\Pictures\CheckpointClear.png => \??\c:\users\admin\pictures\CheckpointClear.png.csruj	MsMpEng.exe

Enumerates connected drives 3 TTPs 25 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\A:	MsMpEng.exe
File opened (read-only)	\??\B:	MsMpEng.exe
File opened (read-only)	\??\T:	MsMpEng.exe
File opened (read-only)	\??\U:	MsMpEng.exe
File opened (read-only)	\??\W:	MsMpEng.exe
File opened (read-only)	\??\X:	MsMpEng.exe
File opened (read-only)	\??\F:	MsMpEng.exe
File opened (read-only)	\??\J:	MsMpEng.exe
File opened (read-only)	\??\P:	MsMpEng.exe
File opened (read-only)	\??\R:	MsMpEng.exe
File opened (read-only)	\??\S:	MsMpEng.exe
File opened (read-only)	\??\V:	MsMpEng.exe
File opened (read-only)	\??\D:	MsMpEng.exe
File opened (read-only)	\??\E:	MsMpEng.exe
File opened (read-only)	\??\G:	MsMpEng.exe
File opened (read-only)	\??\I:	MsMpEng.exe
File opened (read-only)	\??\K:	MsMpEng.exe
File opened (read-only)	\??\L:	MsMpEng.exe
File opened (read-only)	\??\N:	MsMpEng.exe
File opened (read-only)	\??\Q:	MsMpEng.exe
File opened (read-only)	\??\Y:	MsMpEng.exe
File opened (read-only)	\??\Z:	MsMpEng.exe
File opened (read-only)	\??\H:	MsMpEng.exe
File opened (read-only)	\??\M:	MsMpEng.exe
File opened (read-only)	\??\O:	MsMpEng.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ne5645p90n.bmp"	MsMpEng.exe

Drops file in Program Files directory 25 IoCs

description	ioc	Process
File opened for modification	\??\c:\program files\SelectUninstall.dib	MsMpEng.exe
File opened for modification	\??\c:\program files\CloseDisable.pcx	MsMpEng.exe
File opened for modification	\??\c:\program files\EnterAssert.htm	MsMpEng.exe
File opened for modification	\??\c:\program files\HideSync.m1v	MsMpEng.exe
File opened for modification	\??\c:\program files\InvokeRead.rtf	MsMpEng.exe
File opened for modification	\??\c:\program files\MergeTest.jtx	MsMpEng.exe
File opened for modification	\??\c:\program files\PopEnable.wma	MsMpEng.exe
File opened for modification	\??\c:\program files\RestoreRemove.vstx	MsMpEng.exe
File opened for modification	\??\c:\program files\ShowGrant.kix	MsMpEng.exe
File opened for modification	\??\c:\program files\UninstallStart.tiff	MsMpEng.exe
File opened for modification	\??\c:\program files\RedoUnprotect.clr	MsMpEng.exe
File opened for modification	\??\c:\program files\RemoveOpen.temp	MsMpEng.exe
File opened for modification	\??\c:\program files\SendAdd.rtf	MsMpEng.exe
File opened for modification	\??\c:\program files\SendProtect.pub	MsMpEng.exe
File opened for modification	\??\c:\program files\StopCompress.mht	MsMpEng.exe
File opened for modification	\??\c:\program files\UninstallEdit.potm	MsMpEng.exe
File created	\??\c:\program files\tmp	MsMpEng.exe
File created	\??\c:\program files (x86)\tmp	MsMpEng.exe
File opened for modification	\??\c:\program files\ConvertFromUndo.pptx	MsMpEng.exe
File opened for modification	\??\c:\program files\ResolveAdd.wma	MsMpEng.exe
File opened for modification	\??\c:\program files\SubmitJoin.aiff	MsMpEng.exe
File opened for modification	\??\c:\program files\UnregisterSave.mp2	MsMpEng.exe
File created	\??\c:\program files\csruj-readme.txt	MsMpEng.exe
File created	\??\c:\program files (x86)\csruj-readme.txt	MsMpEng.exe
File opened for modification	\??\c:\program files\OptimizeGroup.mpg	MsMpEng.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\MsMpEng.exe	revil.exe
File created	C:\Windows\mpsvc.dll	revil.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4832	MsMpEng.exe
4832	MsMpEng.exe
4832	MsMpEng.exe
4832	MsMpEng.exe
4832	MsMpEng.exe
4832	MsMpEng.exe
4832	MsMpEng.exe
4832	MsMpEng.exe
4832	MsMpEng.exe
4832	MsMpEng.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4832	MsMpEng.exe
Token: SeTakeOwnershipPrivilege	4832	MsMpEng.exe
Token: SeBackupPrivilege	576	vssvc.exe
Token: SeRestorePrivilege	576	vssvc.exe
Token: SeAuditPrivilege	576	vssvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4648 wrote to memory of 4832	4648	revil.exe	71
PID 4648 wrote to memory of 4832	4648	revil.exe	71
PID 4648 wrote to memory of 4832	4648	revil.exe	71
PID 4832 wrote to memory of 4272	4832	MsMpEng.exe	78
PID 4832 wrote to memory of 4272	4832	MsMpEng.exe	78
PID 4832 wrote to memory of 4272	4832	MsMpEng.exe	78

C:\Users\Admin\AppData\Local\Temp\revil.exe
"C:\Users\Admin\AppData\Local\Temp\revil.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4648
- C:\Windows\MsMpEng.exe
  "C:\Windows\MsMpEng.exe"
  2⤵
  - Executes dropped EXE
  - Modifies extensions of user files
  - Enumerates connected drives
  - Sets desktop wallpaper using registry
  - Drops file in Program Files directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4832
- - C:\Windows\SysWOW64\netsh.exe
    netsh advfirewall firewall set rule group="Network Discovery" new enable=Yes
    3⤵
    PID:4272