9b11711efed24b3c6723521a7d7eb4a52e4914db7420e278aa36e727459d59dd

Target
revil_kasaya.exe
Size 136KB
Sample210704-d622hysdcx
SHA256 9b11711efed24b3c6723521a7d7eb4a52e4914db7420e278aa36e727459d59dd
MD5 94d087166651c0020a9e6cc2fdacdc0c
SHA1 99be22569ba9b1e49d3fd36f65faa6795672fcc0
SHA512 0f5a413e57e4cedf0a8df3b33cda3c2c0732ded58c367633e8677bf88786eb786b85c97420fda150fecb68db74dc00f77064c3ea77d00f53904413c9ea3a93ba
MD5 SHA1 SHA512

Score

10^/10

evasion ransomware

Malware Config

Extracted

Path

C:\79f61-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 79f61. 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/731FD902B6FACA31 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/731FD902B6FACA31 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: Xqt55MRO0t/k9sbDO9DF+Oo9my9fU6PBRRLTHMED0WqJII71d/zdySp/ekUPk95w 4foH93oK/HEPR9P3E1I73c11NrCB9sWlQeRTeYVStSuCH3XhimAPDQyJ2n7+Nret xMwNXVABByFyrSGyOpxCk45N1nRMwoR/1luxKY3MqZdwde9qt+fBIS5VmDHAwVbJ B66LvM5ugf/C20SqajQVl6PFX13oqmabap6jz8v6jN62eVkNKjCC+6AeyF/1TDAQ 8D1O4eQeq618IrCQBZdk7IsSh2BkkttDNH4aLVatn2PdH54ZKzrwzKIhn1aGgIt4 Ij9TtHA4CQ6nsz/UHf7iYurHOOVPFEbj0z2B7kg79S900ZqEG7IykWgCwn1hAtVy NQW6BW8vmAxFH3mBSIbkOJYZOktGc+MfT+E1qShyykaJxQ2hfSeRC/FigBxDel5W /MLJJxvdpaKwJlS476y3qCRdUq4YbyMsw2bkNNocaF+Z172+DET8fNoqKxlPY42K sAdeDQvIYceCYNuSBc5GKf6z7IIQnOjM2KiDnY7g6uJCI2X8rWM4JGLZgFEqOXA7 gSRowFQdk2iaRtCI0V8r2isfPAlvGkUii5UzusOsBTqIb3GRmlpIL8hfq97J1+Le MirbHMnLzS4249SdwyVCHXWeb/1jb/hJ5Lc3HVl7Y8G67u7nvDgBrfMFcL9zfj/5 dgLUFTS5JJyiXvdt06dEWbH5XCM4EJoeeVp6U5WmMGW47kZY4kbsJUV9ZgwUG3on Y/dG8zUmut4MznFbH2CmZYDbz1kDbxYf1zlRtLujv/5a6lFhFmYFmimHxZ+UGWu6 jtDIn54EnpVfugggdx+TAZsU2JWrC3hkgPbDSoK3VewmCkk7Fn1ZBLeb9arAm2Qb eLD4YzRgtu6mzxPqkWfs1+WdxuDiTAlLNPnCJWP7SKttyj4AHB4yiHVYg6aIYAUb GIV/xGS2fQ+dZku48rgNY4osQbJFbsCrEiLfA2wexj5OVwG2CbQ0A7IejAJBx350 CKth3gesYt/WdjXXjLmRoEwUuiLf2yHbliDD+uZIui24KiM8FWV85fGoIyOZTKzo zV+YaGWtLg0WkVSQbzdwQ2if9o6uA0k4sCnHAWTCHAt9+Ys15kqsLz3a7M1oHWFy muuWrNmZCdl6SRo9GKkUzdw3Mp51HqH8kjiCm3qHK9OUVe0PKIROSOOayILMTEQu tdXuFVjHntreF6mctJTNoCryPB1xDb+SoU69Bsxd/DZyDSb06oPRcXnr2kjl8rxT IWBWbA== ----------------------------------------------------------------------------------------- !!! 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/731FD902B6FACA31
http://decoder.re/731FD902B6FACA31

Signatures

Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

Modifies extensions of user files 14 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\GrantMount.tif => \??\c:\users\admin\pictures\GrantMount.tif.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\ImportEnter.raw => \??\c:\users\admin\pictures\ImportEnter.raw.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\MoveSave.crw => \??\c:\users\admin\pictures\MoveSave.crw.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\RenameGroup.raw => \??\c:\users\admin\pictures\RenameGroup.raw.79f61	revil_kasaya.exe
File opened for modification	\??\c:\users\admin\pictures\BlockImport.tiff	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\SetDisconnect.png => \??\c:\users\admin\pictures\SetDisconnect.png.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\InstallClear.crw => \??\c:\users\admin\pictures\InstallClear.crw.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\ResetGroup.png => \??\c:\users\admin\pictures\ResetGroup.png.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\SearchSelect.tif => \??\c:\users\admin\pictures\SearchSelect.tif.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\UpdateStart.png => \??\c:\users\admin\pictures\UpdateStart.png.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\BlockImport.tiff => \??\c:\users\admin\pictures\BlockImport.tiff.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\DebugTrace.tif => \??\c:\users\admin\pictures\DebugTrace.tif.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\ResetRead.raw => \??\c:\users\admin\pictures\ResetRead.raw.79f61	revil_kasaya.exe
File renamed	C:\Users\Admin\Pictures\UseExport.png => \??\c:\users\admin\pictures\UseExport.png.79f61	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)	\??\J:	revil_kasaya.exe
File opened (read-only)	\??\V:	revil_kasaya.exe
File opened (read-only)	\??\X:	revil_kasaya.exe
File opened (read-only)	\??\Y:	revil_kasaya.exe
File opened (read-only)	\??\A:	revil_kasaya.exe
File opened (read-only)	\??\F:	revil_kasaya.exe
File opened (read-only)	\??\H:	revil_kasaya.exe
File opened (read-only)	\??\I:	revil_kasaya.exe
File opened (read-only)	\??\N:	revil_kasaya.exe
File opened (read-only)	\??\O:	revil_kasaya.exe
File opened (read-only)	\??\T:	revil_kasaya.exe
File opened (read-only)	\??\U:	revil_kasaya.exe
File opened (read-only)	\??\D:	revil_kasaya.exe
File opened (read-only)	\??\K:	revil_kasaya.exe
File opened (read-only)	\??\Q:	revil_kasaya.exe
File opened (read-only)	\??\R:	revil_kasaya.exe
File opened (read-only)	\??\S:	revil_kasaya.exe
File opened (read-only)	\??\W:	revil_kasaya.exe
File opened (read-only)	\??\B:	revil_kasaya.exe
File opened (read-only)	\??\E:	revil_kasaya.exe
File opened (read-only)	\??\G:	revil_kasaya.exe
File opened (read-only)	\??\L:	revil_kasaya.exe
File opened (read-only)	\??\M:	revil_kasaya.exe
File opened (read-only)	\??\P:	revil_kasaya.exe
File opened (read-only)	\??\Z:	revil_kasaya.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\\54520g.bmp"	revil_kasaya.exe

Drops file in Program Files directory 37 IoCs

description	ioc	Process
File opened for modification	\??\c:\program files\CheckpointMount.m4v	revil_kasaya.exe
File opened for modification	\??\c:\program files\CompareRegister.ini	revil_kasaya.exe
File opened for modification	\??\c:\program files\LimitRemove.png	revil_kasaya.exe
File opened for modification	\??\c:\program files\RegisterConfirm.M2V	revil_kasaya.exe
File created	\??\c:\program files (x86)\79f61-readme.txt	revil_kasaya.exe
File opened for modification	\??\c:\program files\ReceiveFormat.M2V	revil_kasaya.exe
File opened for modification	\??\c:\program files\RestartConvertTo.pptm	revil_kasaya.exe
File opened for modification	\??\c:\program files\LockPublish.fon	revil_kasaya.exe
File opened for modification	\??\c:\program files\PingGroup.htm	revil_kasaya.exe
File opened for modification	\??\c:\program files\SkipStep.dotx	revil_kasaya.exe
File opened for modification	\??\c:\program files\UnpublishDebug.mid	revil_kasaya.exe
File created	\??\c:\program files\tmp	revil_kasaya.exe
File opened for modification	\??\c:\program files\CompleteLimit.reg	revil_kasaya.exe
File opened for modification	\??\c:\program files\ConfirmDisconnect.mp2	revil_kasaya.exe
File opened for modification	\??\c:\program files\CopyWrite.gif	revil_kasaya.exe
File opened for modification	\??\c:\program files\TraceResume.DVR-MS	revil_kasaya.exe
File opened for modification	\??\c:\program files\ClearEnter.MTS	revil_kasaya.exe
File opened for modification	\??\c:\program files\DenyNew.inf	revil_kasaya.exe
File opened for modification	\??\c:\program files\SearchSync.midi	revil_kasaya.exe
File opened for modification	\??\c:\program files\SwitchBackup.i64	revil_kasaya.exe
File opened for modification	\??\c:\program files\DebugWatch.m1v	revil_kasaya.exe
File opened for modification	\??\c:\program files\DismountWatch.xlt	revil_kasaya.exe
File opened for modification	\??\c:\program files\WriteDismount.jpeg	revil_kasaya.exe
File created	\??\c:\program files\79f61-readme.txt	revil_kasaya.exe
File created	\??\c:\program files (x86)\tmp	revil_kasaya.exe
File opened for modification	\??\c:\program files\CompleteInvoke.mpeg2	revil_kasaya.exe
File opened for modification	\??\c:\program files\ConvertEnable.3gp	revil_kasaya.exe
File opened for modification	\??\c:\program files\SplitDisconnect.rtf	revil_kasaya.exe
File opened for modification	\??\c:\program files\SplitEnter.7z	revil_kasaya.exe
File opened for modification	\??\c:\program files\WatchImport.7z	revil_kasaya.exe
File opened for modification	\??\c:\program files\ClearConvertTo.temp	revil_kasaya.exe
File opened for modification	\??\c:\program files\ReadStop.eprtx	revil_kasaya.exe
File opened for modification	\??\c:\program files\RestoreConnect.pcx	revil_kasaya.exe
File opened for modification	\??\c:\program files\SelectReceive.xlt	revil_kasaya.exe
File opened for modification	\??\c:\program files\ExpandSend.otf	revil_kasaya.exe
File opened for modification	\??\c:\program files\WaitUnpublish.txt	revil_kasaya.exe
File opened for modification	\??\c:\program files\CompressRestart.zip	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
664	revil_kasaya.exe
664	revil_kasaya.exe
664	revil_kasaya.exe
664	revil_kasaya.exe
664	revil_kasaya.exe
664	revil_kasaya.exe
664	revil_kasaya.exe
664	revil_kasaya.exe
664	revil_kasaya.exe
664	revil_kasaya.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	664	revil_kasaya.exe
Token: SeTakeOwnershipPrivilege	664	revil_kasaya.exe
Token: SeBackupPrivilege	628	vssvc.exe
Token: SeRestorePrivilege	628	vssvc.exe
Token: SeAuditPrivilege	628	vssvc.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 664 wrote to memory of 508	664	revil_kasaya.exe	77
PID 664 wrote to memory of 508	664	revil_kasaya.exe	77
PID 664 wrote to memory of 508	664	revil_kasaya.exe	77

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
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:664
- C:\Windows\SysWOW64\netsh.exe
  netsh advfirewall firewall set rule group="Network Discovery" new enable=Yes
  2⤵
  PID:508

C:\Windows\system32\wbem\unsecapp.exe
C:\Windows\system32\wbem\unsecapp.exe -Embedding
1⤵
PID:2388

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:628

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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