9b11711efed24b3c6723521a7d7eb4a52e4914db7420e278aa36e727459d59dd

General

Target

revil_kasaya.exe
Size

136KB
MD5

94d087166651c0020a9e6cc2fdacdc0c
SHA1

99be22569ba9b1e49d3fd36f65faa6795672fcc0
SHA256

9b11711efed24b3c6723521a7d7eb4a52e4914db7420e278aa36e727459d59dd
SHA512

0f5a413e57e4cedf0a8df3b33cda3c2c0732ded58c367633e8677bf88786eb786b85c97420fda150fecb68db74dc00f77064c3ea77d00f53904413c9ea3a93ba

Score

10^/10

evasion ransomware

Malware Config

Extracted

Path

C:\870090x41-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 870090x41. 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/2C659FEF8D24C3BA 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/2C659FEF8D24C3BA 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: TboFPg9FZ70foFK5HVxRVjPcpuvg4G4ogDSI2AoxaasqPMo9aAtJwptGsyHUDOGn c4cON4t9tLAcrYgVLvWhaJ5s0HZTWxzi8eqRB/depUgq6F33CHFAm9BdJ9fXR9id xsduCMyDqk7iseQrcgaEXpOx40ZiwFerIKovrqMV47Jv1ChqlG7bDPjfa8OXVsbD F1X4eyfikAH5Ur8AuOljZ2/870kIcHbk4Y22g5+TqpPkHE+uzpi6HGQlIkiL9V7W PUMEdsBmasSajWitZvTq3AxzKkKzPptWKTlAEcRb03Vn0PZw8CoamrHrIYleY2C6 YQYnO7OIVD/15tatySo8Jv01Gh70mNe8zECpTolYI04icL6lVFF5qRtKjGtDwihL AlWwTwMCXOQ+Lb9P7/+rocmg/toYUNTjUveRI9QDulEnNEOVqpsAaefeccytoJed tLQCROwVBmxuXuCYyH+VGGaJjvA+MH4HpDtd3zWANkdfXzuvcJKdZccRy5x6FN3x LYj8DKlU361vd3ye+c/8SVBF55htw2p3sxZTp06yF66sxFzZqS+6HhkIM6SUGLND HeAHm3DfDPeAsxptW8XoT627wLZD/p+1fJeWm5oyuR3k7NfUaK/08QS06cn8pf2S 7w/03UDsDJ76nuJ5Qf3Xnj2h5TOaEYgL8i2jpgS69/iOEj3XgDLdkgxM6ej2ZiTA qEqzJYDNHlvhedj2ySQFTa8+8q/TjviWX12l6zxglGuTp7KSLt35MaYi1/9YrAJb 2YHAnOttbsGgqYkQlFc1GCrrgYK6wB4oTu7IxHi8n5JoAFYKBq+EPcaVaj1p0hoR SBLUI1lsebyP8xvSywQT5WK8v9kxVhJbJ5mA+aqQ5/veZ9qXB8w74nvrxY3vTtfs EtKz613QF+gN50s0Em6yMqMgNEx+6dNy6uWYp61MOiVaVVOIOBQ6BfXmP2Cyfi0q 0UnNjLJIO0mP/frP5mN4mxdr0CLhMb9WXW53rw1C8bpm10/grtR4UTS0vKZqDxcY m/vDrE6zgwohktA5d4RAn6If2LOOn1cnLlJzlo1EPmcZJLZhIwEfnQv4gr/NMknl MSTQC0uzSfJWjrRn8OV5i5qJV1caiSBgZKxe3iEgrjUu0+O5ytJAUMgxCnfaKubR cBO21xFPya8780J3c7NxQ2WP2+yJPXxvl2i7MwqWP4V8UjOsaaSETgoazmhI7Qiv /5aCLFms0+2FOiBUaIGt6hNkjFhUZt8AUHQ7uzs3ILdegFc2rtX3Ea3CJTtf55MJ SFmNKotv7SkTljko ----------------------------------------------------------------------------------------- !!! 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/2C659FEF8D24C3BA

http://decoder.re/2C659FEF8D24C3BA

Signatures

Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

Modifies extensions of user files 12 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\InstallDisconnect.crw => \??\c:\users\admin\pictures\InstallDisconnect.crw.870090x41	revil_kasaya.exe
File opened for modification	\??\c:\users\admin\pictures\InvokeSubmit.tiff	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\RestoreNew.tif => \??\c:\users\admin\pictures\RestoreNew.tif.870090x41	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\SubmitInitialize.png => \??\c:\users\admin\pictures\SubmitInitialize.png.870090x41	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\InitializeStep.raw => \??\c:\users\admin\pictures\InitializeStep.raw.870090x41	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\MoveDisable.raw => \??\c:\users\admin\pictures\MoveDisable.raw.870090x41	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\ResetInitialize.png => \??\c:\users\admin\pictures\ResetInitialize.png.870090x41	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\SuspendApprove.tif => \??\c:\users\admin\pictures\SuspendApprove.tif.870090x41	revil_kasaya.exe
File opened for modification	\??\c:\users\admin\pictures\SyncAdd.tiff	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\SyncAdd.tiff => \??\c:\users\admin\pictures\SyncAdd.tiff.870090x41	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\WatchInvoke.raw => \??\c:\users\admin\pictures\WatchInvoke.raw.870090x41	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\InvokeSubmit.tiff => \??\c:\users\admin\pictures\InvokeSubmit.tiff.870090x41	revil_kasaya.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)	\??\X:	revil_kasaya.exe
File opened (read-only)	\??\Z:	revil_kasaya.exe
File opened (read-only)	\??\D:	revil_kasaya.exe
File opened (read-only)	\??\A:	revil_kasaya.exe
File opened (read-only)	\??\K:	revil_kasaya.exe
File opened (read-only)	\??\M:	revil_kasaya.exe
File opened (read-only)	\??\R:	revil_kasaya.exe
File opened (read-only)	\??\S:	revil_kasaya.exe
File opened (read-only)	\??\B:	revil_kasaya.exe
File opened (read-only)	\??\H:	revil_kasaya.exe
File opened (read-only)	\??\I:	revil_kasaya.exe
File opened (read-only)	\??\J:	revil_kasaya.exe
File opened (read-only)	\??\L:	revil_kasaya.exe
File opened (read-only)	\??\V:	revil_kasaya.exe
File opened (read-only)	\??\W:	revil_kasaya.exe
File opened (read-only)	\??\E:	revil_kasaya.exe
File opened (read-only)	\??\F:	revil_kasaya.exe
File opened (read-only)	\??\G:	revil_kasaya.exe
File opened (read-only)	\??\P:	revil_kasaya.exe
File opened (read-only)	\??\T:	revil_kasaya.exe
File opened (read-only)	\??\N:	revil_kasaya.exe
File opened (read-only)	\??\O:	revil_kasaya.exe
File opened (read-only)	\??\Q:	revil_kasaya.exe
File opened (read-only)	\??\U:	revil_kasaya.exe
File opened (read-only)	\??\Y:	revil_kasaya.exe

Drops file in Program Files directory 13 IoCs

description	ioc	Process
File opened for modification	\??\c:\program files\ExportComplete.asf	revil_kasaya.exe
File opened for modification	\??\c:\program files\MergeInvoke.dwfx	revil_kasaya.exe
File opened for modification	\??\c:\program files\OpenMerge.xlt	revil_kasaya.exe
File opened for modification	\??\c:\program files\RegisterExpand.ADTS	revil_kasaya.exe
File created	\??\c:\program files\tmp	revil_kasaya.exe
File created	\??\c:\program files (x86)\870090x41-readme.txt	revil_kasaya.exe
File opened for modification	\??\c:\program files\ConvertToSplit.m4v	revil_kasaya.exe
File opened for modification	\??\c:\program files\EditRepair.xlt	revil_kasaya.exe
File opened for modification	\??\c:\program files\UnlockEnter.wdp	revil_kasaya.exe
File created	\??\c:\program files\870090x41-readme.txt	revil_kasaya.exe
File created	\??\c:\program files (x86)\tmp	revil_kasaya.exe
File opened for modification	\??\c:\program files\CompleteDeny.aifc	revil_kasaya.exe
File opened for modification	\??\c:\program files\StopSwitch.svg	revil_kasaya.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
772	revil_kasaya.exe
772	revil_kasaya.exe
772	revil_kasaya.exe
772	revil_kasaya.exe
772	revil_kasaya.exe
772	revil_kasaya.exe
772	revil_kasaya.exe
772	revil_kasaya.exe
772	revil_kasaya.exe
772	revil_kasaya.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	772	revil_kasaya.exe
Token: SeTakeOwnershipPrivilege	772	revil_kasaya.exe
Token: SeBackupPrivilege	3524	vssvc.exe
Token: SeRestorePrivilege	3524	vssvc.exe
Token: SeAuditPrivilege	3524	vssvc.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 772 wrote to memory of 776	772	revil_kasaya.exe	78
PID 772 wrote to memory of 776	772	revil_kasaya.exe	78
PID 772 wrote to memory of 776	772	revil_kasaya.exe	78

C:\Users\Admin\AppData\Local\Temp\revil_kasaya.exe
"C:\Users\Admin\AppData\Local\Temp\revil_kasaya.exe"
1⤵
- Modifies extensions of user files
- Enumerates connected drives
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:772
- C:\Windows\SysWOW64\netsh.exe
  netsh advfirewall firewall set rule group="Network Discovery" new enable=Yes
  2⤵
  PID:776