Analysis
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max time kernel
141s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
01-11-2022 06:02
Behavioral task
behavioral1
Sample
cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe
Resource
win10v2004-20220812-en
General
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Target
cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe
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Size
680KB
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MD5
1facfb9229486699183a6ae939c8741f
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SHA1
878565c1b091f8a7ec357c4cbe9617e0e30f9d0a
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SHA256
cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc
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SHA512
3008a8a25b0ea298e72c4f3d23fa3bd77da097bc285f8979aa001f7d3eaf41b5679762eca9e6ae1ae52da88e5faac990e136a6af38bfc4c2618633f1695c7869
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SSDEEP
12288:xcBDJBj9sUD7KfhY74h0Sj1zkXOkA9KhShk13RcD0yBwQ/3I9+m:A3j91D7KZY8KEJkA8X6j3I9+
Malware Config
Extracted
C:\!_HOW_RECOVERY_FILES_!.HTML
href="mailto:[email protected]">[email protected]</a><br>
href="mailto:[email protected]">[email protected]</a>
http-equiv="X-UA-Compatible"
http://meyerweb.com/eric/tools/css/reset/
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/0x000400000000072b-135.dat family_medusalocker behavioral2/files/0x000400000000072b-136.dat family_medusalocker -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe -
Executes dropped EXE 1 IoCs
pid Process 2548 svhost.exe -
Modifies extensions of user files 3 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\ConvertFromFind.png => C:\Users\Admin\Pictures\ConvertFromFind.png.EMPg296LCK cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File renamed C:\Users\Admin\Pictures\TestExport.raw => C:\Users\Admin\Pictures\TestExport.raw.EMPg296LCK cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File renamed C:\Users\Admin\Pictures\UseExpand.raw => C:\Users\Admin\Pictures\UseExpand.raw.EMPg296LCK cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.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" cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.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 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.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) \??\J: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\L: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\R: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\U: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\X: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\Z: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\A: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\B: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\M: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\N: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\S: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\T: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\V: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\F: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\G: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\I: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\P: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\E: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\H: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\K: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\O: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\Q: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\W: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe File opened (read-only) \??\Y: cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.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 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 5080 wmic.exe Token: SeSecurityPrivilege 5080 wmic.exe Token: SeTakeOwnershipPrivilege 5080 wmic.exe Token: SeLoadDriverPrivilege 5080 wmic.exe Token: SeSystemProfilePrivilege 5080 wmic.exe Token: SeSystemtimePrivilege 5080 wmic.exe Token: SeProfSingleProcessPrivilege 5080 wmic.exe Token: SeIncBasePriorityPrivilege 5080 wmic.exe Token: SeCreatePagefilePrivilege 5080 wmic.exe Token: SeBackupPrivilege 5080 wmic.exe Token: SeRestorePrivilege 5080 wmic.exe Token: SeShutdownPrivilege 5080 wmic.exe Token: SeDebugPrivilege 5080 wmic.exe Token: SeSystemEnvironmentPrivilege 5080 wmic.exe Token: SeRemoteShutdownPrivilege 5080 wmic.exe Token: SeUndockPrivilege 5080 wmic.exe Token: SeManageVolumePrivilege 5080 wmic.exe Token: 33 5080 wmic.exe Token: 34 5080 wmic.exe Token: 35 5080 wmic.exe Token: 36 5080 wmic.exe Token: SeIncreaseQuotaPrivilege 3996 wmic.exe Token: SeSecurityPrivilege 3996 wmic.exe Token: SeTakeOwnershipPrivilege 3996 wmic.exe Token: SeLoadDriverPrivilege 3996 wmic.exe Token: SeSystemProfilePrivilege 3996 wmic.exe Token: SeSystemtimePrivilege 3996 wmic.exe Token: SeProfSingleProcessPrivilege 3996 wmic.exe Token: SeIncBasePriorityPrivilege 3996 wmic.exe Token: SeCreatePagefilePrivilege 3996 wmic.exe Token: SeBackupPrivilege 3996 wmic.exe Token: SeRestorePrivilege 3996 wmic.exe Token: SeShutdownPrivilege 3996 wmic.exe Token: SeDebugPrivilege 3996 wmic.exe Token: SeSystemEnvironmentPrivilege 3996 wmic.exe Token: SeRemoteShutdownPrivilege 3996 wmic.exe Token: SeUndockPrivilege 3996 wmic.exe Token: SeManageVolumePrivilege 3996 wmic.exe Token: 33 3996 wmic.exe Token: 34 3996 wmic.exe Token: 35 3996 wmic.exe Token: 36 3996 wmic.exe Token: SeIncreaseQuotaPrivilege 4716 wmic.exe Token: SeSecurityPrivilege 4716 wmic.exe Token: SeTakeOwnershipPrivilege 4716 wmic.exe Token: SeLoadDriverPrivilege 4716 wmic.exe Token: SeSystemProfilePrivilege 4716 wmic.exe Token: SeSystemtimePrivilege 4716 wmic.exe Token: SeProfSingleProcessPrivilege 4716 wmic.exe Token: SeIncBasePriorityPrivilege 4716 wmic.exe Token: SeCreatePagefilePrivilege 4716 wmic.exe Token: SeBackupPrivilege 4716 wmic.exe Token: SeRestorePrivilege 4716 wmic.exe Token: SeShutdownPrivilege 4716 wmic.exe Token: SeDebugPrivilege 4716 wmic.exe Token: SeSystemEnvironmentPrivilege 4716 wmic.exe Token: SeRemoteShutdownPrivilege 4716 wmic.exe Token: SeUndockPrivilege 4716 wmic.exe Token: SeManageVolumePrivilege 4716 wmic.exe Token: 33 4716 wmic.exe Token: 34 4716 wmic.exe Token: 35 4716 wmic.exe Token: 36 4716 wmic.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2740 wrote to memory of 5080 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 82 PID 2740 wrote to memory of 5080 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 82 PID 2740 wrote to memory of 5080 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 82 PID 2740 wrote to memory of 3996 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 84 PID 2740 wrote to memory of 3996 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 84 PID 2740 wrote to memory of 3996 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 84 PID 2740 wrote to memory of 4716 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 86 PID 2740 wrote to memory of 4716 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 86 PID 2740 wrote to memory of 4716 2740 cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe 86 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.exe"C:\Users\Admin\AppData\Local\Temp\cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc.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:2740 -
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:5080
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:3996
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4716
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C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe1⤵
- Executes dropped EXE
PID:2548
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
680KB
MD51facfb9229486699183a6ae939c8741f
SHA1878565c1b091f8a7ec357c4cbe9617e0e30f9d0a
SHA256cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc
SHA5123008a8a25b0ea298e72c4f3d23fa3bd77da097bc285f8979aa001f7d3eaf41b5679762eca9e6ae1ae52da88e5faac990e136a6af38bfc4c2618633f1695c7869
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Filesize
680KB
MD51facfb9229486699183a6ae939c8741f
SHA1878565c1b091f8a7ec357c4cbe9617e0e30f9d0a
SHA256cb21b99cc8c15edc335d2948672ac3beaf5e85ccdebdffd641ad5d798080fcfc
SHA5123008a8a25b0ea298e72c4f3d23fa3bd77da097bc285f8979aa001f7d3eaf41b5679762eca9e6ae1ae52da88e5faac990e136a6af38bfc4c2618633f1695c7869