Analysis
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max time kernel
137s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
25-01-2023 18:44
Behavioral task
behavioral1
Sample
26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe
Resource
win10v2004-20220812-en
General
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Target
26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe
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Size
669KB
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MD5
646698572afbbf24f50ec5681feb2db7
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SHA1
70530bc23bad38e6aee66cbb2c2f58a96a18fb79
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SHA256
26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0
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SHA512
89bad552a3c0d8b28550957872561d03bf239d2708d616f21cbf22e58ae749542b07eee00fedac6fdb83c5969f50ea0f56fc103264a164671a94e156f73f160a
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SSDEEP
12288:dQA0FfTcwpBuV2UxqDmuiLZeUaoFi2XZWfGe615HhAZV8D4KD/KeX:Tuf4wTuV2Ux3uIZeUBi2Te6HWdKrKe
Malware Config
Extracted
C:\how_to_back_files.html
Signatures
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MedusaLocker
Ransomware with several variants first seen in September 2019.
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MedusaLocker payload 2 IoCs
resource yara_rule behavioral2/files/0x0008000000022e0f-135.dat family_medusalocker behavioral2/files/0x0008000000022e0f-136.dat family_medusalocker -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe -
Executes dropped EXE 1 IoCs
pid Process 3668 svhost.exe -
Modifies extensions of user files 4 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\ResumeOpen.png => C:\Users\Admin\Pictures\ResumeOpen.png.onelock 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File renamed C:\Users\Admin\Pictures\ApproveEnable.png => C:\Users\Admin\Pictures\ApproveEnable.png.onelock 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File renamed C:\Users\Admin\Pictures\RenameRevoke.crw => C:\Users\Admin\Pictures\RenameRevoke.crw.onelock 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File renamed C:\Users\Admin\Pictures\RestoreFormat.png => C:\Users\Admin\Pictures\RestoreFormat.png.onelock 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe -
Drops desktop.ini file(s) 1 IoCs
description ioc Process File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-2629973501-4017243118-3254762364-1000\desktop.ini 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe -
Enumerates connected drives 3 TTPs 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\B: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\K: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\Q: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\X: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\Z: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\A: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\G: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\N: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\T: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\W: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\F: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\I: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\L: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\M: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\O: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\R: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\S: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\V: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\Y: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\E: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\H: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\J: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\P: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe File opened (read-only) \??\U: 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 1836 wmic.exe Token: SeSecurityPrivilege 1836 wmic.exe Token: SeTakeOwnershipPrivilege 1836 wmic.exe Token: SeLoadDriverPrivilege 1836 wmic.exe Token: SeSystemProfilePrivilege 1836 wmic.exe Token: SeSystemtimePrivilege 1836 wmic.exe Token: SeProfSingleProcessPrivilege 1836 wmic.exe Token: SeIncBasePriorityPrivilege 1836 wmic.exe Token: SeCreatePagefilePrivilege 1836 wmic.exe Token: SeBackupPrivilege 1836 wmic.exe Token: SeRestorePrivilege 1836 wmic.exe Token: SeShutdownPrivilege 1836 wmic.exe Token: SeDebugPrivilege 1836 wmic.exe Token: SeSystemEnvironmentPrivilege 1836 wmic.exe Token: SeRemoteShutdownPrivilege 1836 wmic.exe Token: SeUndockPrivilege 1836 wmic.exe Token: SeManageVolumePrivilege 1836 wmic.exe Token: 33 1836 wmic.exe Token: 34 1836 wmic.exe Token: 35 1836 wmic.exe Token: 36 1836 wmic.exe Token: SeIncreaseQuotaPrivilege 4928 wmic.exe Token: SeSecurityPrivilege 4928 wmic.exe Token: SeTakeOwnershipPrivilege 4928 wmic.exe Token: SeLoadDriverPrivilege 4928 wmic.exe Token: SeSystemProfilePrivilege 4928 wmic.exe Token: SeSystemtimePrivilege 4928 wmic.exe Token: SeProfSingleProcessPrivilege 4928 wmic.exe Token: SeIncBasePriorityPrivilege 4928 wmic.exe Token: SeCreatePagefilePrivilege 4928 wmic.exe Token: SeBackupPrivilege 4928 wmic.exe Token: SeRestorePrivilege 4928 wmic.exe Token: SeShutdownPrivilege 4928 wmic.exe Token: SeDebugPrivilege 4928 wmic.exe Token: SeSystemEnvironmentPrivilege 4928 wmic.exe Token: SeRemoteShutdownPrivilege 4928 wmic.exe Token: SeUndockPrivilege 4928 wmic.exe Token: SeManageVolumePrivilege 4928 wmic.exe Token: 33 4928 wmic.exe Token: 34 4928 wmic.exe Token: 35 4928 wmic.exe Token: 36 4928 wmic.exe Token: SeIncreaseQuotaPrivilege 1812 wmic.exe Token: SeSecurityPrivilege 1812 wmic.exe Token: SeTakeOwnershipPrivilege 1812 wmic.exe Token: SeLoadDriverPrivilege 1812 wmic.exe Token: SeSystemProfilePrivilege 1812 wmic.exe Token: SeSystemtimePrivilege 1812 wmic.exe Token: SeProfSingleProcessPrivilege 1812 wmic.exe Token: SeIncBasePriorityPrivilege 1812 wmic.exe Token: SeCreatePagefilePrivilege 1812 wmic.exe Token: SeBackupPrivilege 1812 wmic.exe Token: SeRestorePrivilege 1812 wmic.exe Token: SeShutdownPrivilege 1812 wmic.exe Token: SeDebugPrivilege 1812 wmic.exe Token: SeSystemEnvironmentPrivilege 1812 wmic.exe Token: SeRemoteShutdownPrivilege 1812 wmic.exe Token: SeUndockPrivilege 1812 wmic.exe Token: SeManageVolumePrivilege 1812 wmic.exe Token: 33 1812 wmic.exe Token: 34 1812 wmic.exe Token: 35 1812 wmic.exe Token: 36 1812 wmic.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2412 wrote to memory of 1836 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 81 PID 2412 wrote to memory of 1836 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 81 PID 2412 wrote to memory of 1836 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 81 PID 2412 wrote to memory of 4928 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 83 PID 2412 wrote to memory of 4928 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 83 PID 2412 wrote to memory of 4928 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 83 PID 2412 wrote to memory of 1812 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 85 PID 2412 wrote to memory of 1812 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 85 PID 2412 wrote to memory of 1812 2412 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe 85 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe"C:\Users\Admin\AppData\Local\Temp\26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe"1⤵
- UAC bypass
- Modifies extensions of user files
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2412 -
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1836
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4928
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1812
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C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe1⤵
- Executes dropped EXE
PID:3668
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
669KB
MD5646698572afbbf24f50ec5681feb2db7
SHA170530bc23bad38e6aee66cbb2c2f58a96a18fb79
SHA25626af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0
SHA51289bad552a3c0d8b28550957872561d03bf239d2708d616f21cbf22e58ae749542b07eee00fedac6fdb83c5969f50ea0f56fc103264a164671a94e156f73f160a
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Filesize
669KB
MD5646698572afbbf24f50ec5681feb2db7
SHA170530bc23bad38e6aee66cbb2c2f58a96a18fb79
SHA25626af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0
SHA51289bad552a3c0d8b28550957872561d03bf239d2708d616f21cbf22e58ae749542b07eee00fedac6fdb83c5969f50ea0f56fc103264a164671a94e156f73f160a