Analysis
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max time kernel
150s -
max time network
148s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
09-11-2020 19:27
Static task
static1
Behavioral task
behavioral1
Sample
file.dll
Resource
win7v20201028
Behavioral task
behavioral2
Sample
file.dll
Resource
win10v20201028
General
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Target
file.dll
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Size
164KB
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MD5
d468499ca5f8d8f528920635e89ab3f2
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SHA1
ce1db497eef5371e20a8600281672ca21c662a7d
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SHA256
b927203812bd5776ed375a59e3131046750b5050b3847bf79f61a491026f1b25
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SHA512
2232c6badf61f2db66a0a7e4173534eb3aa1415efc851ee9d77b2bb6aa67933c0b6bb97a17d0b155fb608b84950bf51c9f189cd072ebbb683c7cf4cf5808b3a9
Malware Config
Extracted
C:\o1u52a4b49-readme.txt
sodinokibi
http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/EA2846180DAB3D0E
http://decryptor.cc/EA2846180DAB3D0E
Signatures
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Sodin,Sodinokibi,REvil
Ransomware with advanced anti-analysis and privilege escalation functionality.
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Blacklisted process makes network request 63 IoCs
Processes:
rundll32.exeflow pid process 23 1136 rundll32.exe 25 1136 rundll32.exe 27 1136 rundll32.exe 29 1136 rundll32.exe 31 1136 rundll32.exe 33 1136 rundll32.exe 35 1136 rundll32.exe 37 1136 rundll32.exe 39 1136 rundll32.exe 41 1136 rundll32.exe 43 1136 rundll32.exe 45 1136 rundll32.exe 47 1136 rundll32.exe 49 1136 rundll32.exe 50 1136 rundll32.exe 51 1136 rundll32.exe 54 1136 rundll32.exe 56 1136 rundll32.exe 58 1136 rundll32.exe 60 1136 rundll32.exe 62 1136 rundll32.exe 64 1136 rundll32.exe 66 1136 rundll32.exe 68 1136 rundll32.exe 70 1136 rundll32.exe 72 1136 rundll32.exe 74 1136 rundll32.exe 76 1136 rundll32.exe 78 1136 rundll32.exe 80 1136 rundll32.exe 82 1136 rundll32.exe 84 1136 rundll32.exe 86 1136 rundll32.exe 88 1136 rundll32.exe 91 1136 rundll32.exe 94 1136 rundll32.exe 96 1136 rundll32.exe 98 1136 rundll32.exe 100 1136 rundll32.exe 103 1136 rundll32.exe 105 1136 rundll32.exe 107 1136 rundll32.exe 109 1136 rundll32.exe 111 1136 rundll32.exe 113 1136 rundll32.exe 114 1136 rundll32.exe 116 1136 rundll32.exe 118 1136 rundll32.exe 120 1136 rundll32.exe 122 1136 rundll32.exe 124 1136 rundll32.exe 126 1136 rundll32.exe 128 1136 rundll32.exe 130 1136 rundll32.exe 132 1136 rundll32.exe 134 1136 rundll32.exe 135 1136 rundll32.exe 137 1136 rundll32.exe 139 1136 rundll32.exe 141 1136 rundll32.exe 143 1136 rundll32.exe 144 1136 rundll32.exe 146 1136 rundll32.exe -
Modifies extensions of user files 10 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
rundll32.exedescription ioc process File renamed C:\Users\Admin\Pictures\CopyGroup.crw => \??\c:\users\admin\pictures\CopyGroup.crw.o1u52a4b49 rundll32.exe File renamed C:\Users\Admin\Pictures\MergeShow.crw => \??\c:\users\admin\pictures\MergeShow.crw.o1u52a4b49 rundll32.exe File renamed C:\Users\Admin\Pictures\PublishExpand.tif => \??\c:\users\admin\pictures\PublishExpand.tif.o1u52a4b49 rundll32.exe File renamed C:\Users\Admin\Pictures\StepPop.tif => \??\c:\users\admin\pictures\StepPop.tif.o1u52a4b49 rundll32.exe File renamed C:\Users\Admin\Pictures\UndoFormat.png => \??\c:\users\admin\pictures\UndoFormat.png.o1u52a4b49 rundll32.exe File opened for modification \??\c:\users\admin\pictures\SaveWait.tiff rundll32.exe File renamed C:\Users\Admin\Pictures\SelectUnprotect.png => \??\c:\users\admin\pictures\SelectUnprotect.png.o1u52a4b49 rundll32.exe File renamed C:\Users\Admin\Pictures\SetFind.png => \??\c:\users\admin\pictures\SetFind.png.o1u52a4b49 rundll32.exe File renamed C:\Users\Admin\Pictures\UninstallOptimize.crw => \??\c:\users\admin\pictures\UninstallOptimize.crw.o1u52a4b49 rundll32.exe File renamed C:\Users\Admin\Pictures\SaveWait.tiff => \??\c:\users\admin\pictures\SaveWait.tiff.o1u52a4b49 rundll32.exe -
Enumerates connected drives 3 TTPs 25 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
rundll32.exedescription ioc process File opened (read-only) \??\A: rundll32.exe File opened (read-only) \??\B: rundll32.exe File opened (read-only) \??\P: rundll32.exe File opened (read-only) \??\R: rundll32.exe File opened (read-only) \??\T: rundll32.exe File opened (read-only) \??\W: rundll32.exe File opened (read-only) \??\F: rundll32.exe File opened (read-only) \??\I: rundll32.exe File opened (read-only) \??\O: rundll32.exe File opened (read-only) \??\Q: rundll32.exe File opened (read-only) \??\U: rundll32.exe File opened (read-only) \??\V: rundll32.exe File opened (read-only) \??\X: rundll32.exe File opened (read-only) \??\E: rundll32.exe File opened (read-only) \??\J: rundll32.exe File opened (read-only) \??\K: rundll32.exe File opened (read-only) \??\L: rundll32.exe File opened (read-only) \??\M: rundll32.exe File opened (read-only) \??\S: rundll32.exe File opened (read-only) \??\G: rundll32.exe File opened (read-only) \??\H: rundll32.exe File opened (read-only) \??\N: rundll32.exe File opened (read-only) \??\Y: rundll32.exe File opened (read-only) \??\Z: rundll32.exe File opened (read-only) \??\D: rundll32.exe -
Modifies service 2 TTPs 5 IoCs
Processes:
vssvc.exedescription ioc process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\COM+ REGDB Writer vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR Writer vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5} vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer vssvc.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
rundll32.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\e2jud.bmp" rundll32.exe -
Drops file in Program Files directory 17 IoCs
Processes:
rundll32.exedescription ioc process File created \??\c:\program files\o1u52a4b49-readme.txt rundll32.exe File created \??\c:\program files (x86)\o1u52a4b49-readme.txt rundll32.exe File opened for modification \??\c:\program files\ExportAdd.sql rundll32.exe File opened for modification \??\c:\program files\MoveAssert.inf rundll32.exe File opened for modification \??\c:\program files\WriteResolve.xml rundll32.exe File opened for modification \??\c:\program files\ConvertToGroup.rmi rundll32.exe File opened for modification \??\c:\program files\ConvertToReceive.tiff rundll32.exe File opened for modification \??\c:\program files\DismountMerge.iso rundll32.exe File opened for modification \??\c:\program files\JoinCompare.rar rundll32.exe File opened for modification \??\c:\program files\ProtectInitialize.dot rundll32.exe File opened for modification \??\c:\program files\UnlockClose.ADTS rundll32.exe File opened for modification \??\c:\program files\CopyPush.mpv2 rundll32.exe File opened for modification \??\c:\program files\MountEnter.txt rundll32.exe File opened for modification \??\c:\program files\ReadInvoke.tif rundll32.exe File opened for modification \??\c:\program files\RegisterOptimize.7z rundll32.exe File opened for modification \??\c:\program files\PublishDisable.bmp rundll32.exe File opened for modification \??\c:\program files\ResetSearch.TTS rundll32.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
Processes:
rundll32.exepowershell.exepid process 1136 rundll32.exe 1136 rundll32.exe 912 powershell.exe 912 powershell.exe 912 powershell.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
rundll32.exepowershell.exevssvc.exedescription pid process Token: SeDebugPrivilege 1136 rundll32.exe Token: SeDebugPrivilege 912 powershell.exe Token: SeBackupPrivilege 3552 vssvc.exe Token: SeRestorePrivilege 3552 vssvc.exe Token: SeAuditPrivilege 3552 vssvc.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 412 wrote to memory of 1136 412 rundll32.exe rundll32.exe PID 412 wrote to memory of 1136 412 rundll32.exe rundll32.exe PID 412 wrote to memory of 1136 412 rundll32.exe rundll32.exe PID 1136 wrote to memory of 912 1136 rundll32.exe powershell.exe PID 1136 wrote to memory of 912 1136 rundll32.exe powershell.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\file.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\file.dll,#12⤵
- Blacklisted process makes network request
- 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
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -e RwBlAHQALQBXAG0AaQBPAGIAagBlAGMAdAAgAFcAaQBuADMAMgBfAFMAaABhAGQAbwB3AGMAbwBwAHkAIAB8ACAARgBvAHIARQBhAGMAaAAtAE8AYgBqAGUAYwB0ACAAewAkAF8ALgBEAGUAbABlAHQAZQAoACkAOwB9AA==3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\wbem\unsecapp.exeC:\Windows\system32\wbem\unsecapp.exe -Embedding1⤵
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/912-1-0x0000000000000000-mapping.dmp
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memory/912-2-0x00007FF9E6800000-0x00007FF9E71EC000-memory.dmpFilesize
9.9MB
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memory/912-3-0x00000212A5A50000-0x00000212A5A51000-memory.dmpFilesize
4KB
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memory/912-4-0x00000212A5C00000-0x00000212A5C01000-memory.dmpFilesize
4KB
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memory/1136-0-0x0000000000000000-mapping.dmp