Analysis
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max time kernel
173s -
max time network
144s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
01/02/2022, 15:49
Static task
static1
Behavioral task
behavioral1
Sample
21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe
Resource
win10v2004-en-20220113
General
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Target
21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe
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Size
2.6MB
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MD5
45e04dc2ceaa6517bc4c2067677260fc
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SHA1
0a2198da09d38eaee5cbebbd8fe286c00d0e6f96
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SHA256
21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0
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SHA512
dee02a6313329b1957c791f72255afbadb15ffedd5993819e126cd9ffdd5838309898918ccb5dcbbd95c37cfd5ab251af20e80062864dfa0a4c40be31aca7f0b
Malware Config
Extracted
\??\Z:\Boot\HOW_TO_RECOVER_DATA.html
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 behavioral1/files/0x00070000000125ca-56.dat family_medusalocker behavioral1/files/0x00070000000125ca-57.dat family_medusalocker -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Executes dropped EXE 1 IoCs
pid Process 1220 svchostt.exe -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe -
Drops desktop.ini file(s) 1 IoCs
description ioc Process File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-2329389628-4064185017-3901522362-1000\desktop.ini 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.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) \??\P: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\Q: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\R: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\S: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\Y: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\Z: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\G: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\T: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\X: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\L: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\E: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\J: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\M: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\N: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\O: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\U: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\V: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\A: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\F: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\H: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\I: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\K: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\W: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe File opened (read-only) \??\B: 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Interacts with shadow copies 2 TTPs 3 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 1896 vssadmin.exe 1904 vssadmin.exe 1632 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeBackupPrivilege 1676 vssvc.exe Token: SeRestorePrivilege 1676 vssvc.exe Token: SeAuditPrivilege 1676 vssvc.exe Token: SeIncreaseQuotaPrivilege 396 wmic.exe Token: SeSecurityPrivilege 396 wmic.exe Token: SeTakeOwnershipPrivilege 396 wmic.exe Token: SeLoadDriverPrivilege 396 wmic.exe Token: SeSystemProfilePrivilege 396 wmic.exe Token: SeSystemtimePrivilege 396 wmic.exe Token: SeProfSingleProcessPrivilege 396 wmic.exe Token: SeIncBasePriorityPrivilege 396 wmic.exe Token: SeCreatePagefilePrivilege 396 wmic.exe Token: SeBackupPrivilege 396 wmic.exe Token: SeRestorePrivilege 396 wmic.exe Token: SeShutdownPrivilege 396 wmic.exe Token: SeDebugPrivilege 396 wmic.exe Token: SeSystemEnvironmentPrivilege 396 wmic.exe Token: SeRemoteShutdownPrivilege 396 wmic.exe Token: SeUndockPrivilege 396 wmic.exe Token: SeManageVolumePrivilege 396 wmic.exe Token: 33 396 wmic.exe Token: 34 396 wmic.exe Token: 35 396 wmic.exe Token: SeIncreaseQuotaPrivilege 1480 wmic.exe Token: SeSecurityPrivilege 1480 wmic.exe Token: SeTakeOwnershipPrivilege 1480 wmic.exe Token: SeLoadDriverPrivilege 1480 wmic.exe Token: SeSystemProfilePrivilege 1480 wmic.exe Token: SeSystemtimePrivilege 1480 wmic.exe Token: SeProfSingleProcessPrivilege 1480 wmic.exe Token: SeIncBasePriorityPrivilege 1480 wmic.exe Token: SeCreatePagefilePrivilege 1480 wmic.exe Token: SeBackupPrivilege 1480 wmic.exe Token: SeRestorePrivilege 1480 wmic.exe Token: SeShutdownPrivilege 1480 wmic.exe Token: SeDebugPrivilege 1480 wmic.exe Token: SeSystemEnvironmentPrivilege 1480 wmic.exe Token: SeRemoteShutdownPrivilege 1480 wmic.exe Token: SeUndockPrivilege 1480 wmic.exe Token: SeManageVolumePrivilege 1480 wmic.exe Token: 33 1480 wmic.exe Token: 34 1480 wmic.exe Token: 35 1480 wmic.exe Token: SeIncreaseQuotaPrivilege 1908 wmic.exe Token: SeSecurityPrivilege 1908 wmic.exe Token: SeTakeOwnershipPrivilege 1908 wmic.exe Token: SeLoadDriverPrivilege 1908 wmic.exe Token: SeSystemProfilePrivilege 1908 wmic.exe Token: SeSystemtimePrivilege 1908 wmic.exe Token: SeProfSingleProcessPrivilege 1908 wmic.exe Token: SeIncBasePriorityPrivilege 1908 wmic.exe Token: SeCreatePagefilePrivilege 1908 wmic.exe Token: SeBackupPrivilege 1908 wmic.exe Token: SeRestorePrivilege 1908 wmic.exe Token: SeShutdownPrivilege 1908 wmic.exe Token: SeDebugPrivilege 1908 wmic.exe Token: SeSystemEnvironmentPrivilege 1908 wmic.exe Token: SeRemoteShutdownPrivilege 1908 wmic.exe Token: SeUndockPrivilege 1908 wmic.exe Token: SeManageVolumePrivilege 1908 wmic.exe Token: 33 1908 wmic.exe Token: 34 1908 wmic.exe Token: 35 1908 wmic.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 1572 wrote to memory of 1632 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 28 PID 1572 wrote to memory of 1632 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 28 PID 1572 wrote to memory of 1632 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 28 PID 1572 wrote to memory of 1632 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 28 PID 1572 wrote to memory of 396 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 32 PID 1572 wrote to memory of 396 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 32 PID 1572 wrote to memory of 396 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 32 PID 1572 wrote to memory of 396 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 32 PID 1572 wrote to memory of 1896 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 35 PID 1572 wrote to memory of 1896 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 35 PID 1572 wrote to memory of 1896 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 35 PID 1572 wrote to memory of 1896 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 35 PID 1572 wrote to memory of 1480 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 37 PID 1572 wrote to memory of 1480 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 37 PID 1572 wrote to memory of 1480 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 37 PID 1572 wrote to memory of 1480 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 37 PID 1572 wrote to memory of 1904 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 39 PID 1572 wrote to memory of 1904 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 39 PID 1572 wrote to memory of 1904 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 39 PID 1572 wrote to memory of 1904 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 39 PID 1572 wrote to memory of 1908 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 41 PID 1572 wrote to memory of 1908 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 41 PID 1572 wrote to memory of 1908 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 41 PID 1572 wrote to memory of 1908 1572 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe 41 PID 1744 wrote to memory of 1220 1744 taskeng.exe 44 PID 1744 wrote to memory of 1220 1744 taskeng.exe 44 PID 1744 wrote to memory of 1220 1744 taskeng.exe 44 PID 1744 wrote to memory of 1220 1744 taskeng.exe 44 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe"C:\Users\Admin\AppData\Local\Temp\21c644438a00fb75fabb577076933a99119e9f07e71eaab3f7dc6c629860c4c0.exe"1⤵
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1572 -
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1632
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:396
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1896
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1480
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1904
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1908
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1676
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C:\Windows\system32\taskeng.exetaskeng.exe {B068E0AC-1216-4DFD-84D3-508165F7688C} S-1-5-21-2329389628-4064185017-3901522362-1000:QSKGHMYQ\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:1744 -
C:\Users\Admin\AppData\Roaming\svchostt.exeC:\Users\Admin\AppData\Roaming\svchostt.exe2⤵
- Executes dropped EXE
PID:1220
-