Analysis
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max time kernel
157s -
max time network
128s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
06-01-2024 09:22
Behavioral task
behavioral1
Sample
45de70c85ece8763c685808eea085df4.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
45de70c85ece8763c685808eea085df4.exe
Resource
win10v2004-20231222-en
General
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Target
45de70c85ece8763c685808eea085df4.exe
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Size
669KB
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MD5
45de70c85ece8763c685808eea085df4
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SHA1
c9dd5313a661fd17b154ccb17a36e8399fc933a5
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SHA256
d595339cbbf415eca195eb3a0d9a8b6c9ff82a0cf36e4e867f5cef24503bb532
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SHA512
03a1d922711db1afc0a512151371c9a97a7478578c11591109537b1427aeac8b3ac44aa52c83439afe56e20134fd888bcaee1632f6046ce8edf0d99622fb362d
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SSDEEP
12288:dQA0FfTcwpBuV2UxqDmuiLZeUaoFi2XZWfGe615HhAZV8DNKD/KeX:Tuf4wTuV2Ux3uIZeUBi2Te6HWgKrKe
Malware Config
Extracted
\Device\HarddiskVolume1\Boot\HOW_TO_RECOVER_DATA.html
Signatures
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MedusaLocker
Ransomware with several variants first seen in September 2019.
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MedusaLocker payload 1 IoCs
resource yara_rule behavioral1/files/0x00080000000120f8-911.dat family_medusalocker -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 45de70c85ece8763c685808eea085df4.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 45de70c85ece8763c685808eea085df4.exe -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (299) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Executes dropped EXE 1 IoCs
pid Process 3036 svhost.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" 45de70c85ece8763c685808eea085df4.exe -
Drops desktop.ini file(s) 1 IoCs
description ioc Process File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-2444714103-3190537498-3629098939-1000\desktop.ini 45de70c85ece8763c685808eea085df4.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) \??\V: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\Z: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\E: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\N: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\Q: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\T: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\X: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\G: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\I: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\L: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\S: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\R: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\Y: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\F: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\A: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\K: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\O: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\P: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\U: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\W: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\B: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\H: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\J: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\M: 45de70c85ece8763c685808eea085df4.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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 2364 vssadmin.exe 2776 vssadmin.exe 2596 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe 1684 45de70c85ece8763c685808eea085df4.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeBackupPrivilege 2736 vssvc.exe Token: SeRestorePrivilege 2736 vssvc.exe Token: SeAuditPrivilege 2736 vssvc.exe Token: SeIncreaseQuotaPrivilege 2692 wmic.exe Token: SeSecurityPrivilege 2692 wmic.exe Token: SeTakeOwnershipPrivilege 2692 wmic.exe Token: SeLoadDriverPrivilege 2692 wmic.exe Token: SeSystemProfilePrivilege 2692 wmic.exe Token: SeSystemtimePrivilege 2692 wmic.exe Token: SeProfSingleProcessPrivilege 2692 wmic.exe Token: SeIncBasePriorityPrivilege 2692 wmic.exe Token: SeCreatePagefilePrivilege 2692 wmic.exe Token: SeBackupPrivilege 2692 wmic.exe Token: SeRestorePrivilege 2692 wmic.exe Token: SeShutdownPrivilege 2692 wmic.exe Token: SeDebugPrivilege 2692 wmic.exe Token: SeSystemEnvironmentPrivilege 2692 wmic.exe Token: SeRemoteShutdownPrivilege 2692 wmic.exe Token: SeUndockPrivilege 2692 wmic.exe Token: SeManageVolumePrivilege 2692 wmic.exe Token: 33 2692 wmic.exe Token: 34 2692 wmic.exe Token: 35 2692 wmic.exe Token: SeIncreaseQuotaPrivilege 3012 wmic.exe Token: SeSecurityPrivilege 3012 wmic.exe Token: SeTakeOwnershipPrivilege 3012 wmic.exe Token: SeLoadDriverPrivilege 3012 wmic.exe Token: SeSystemProfilePrivilege 3012 wmic.exe Token: SeSystemtimePrivilege 3012 wmic.exe Token: SeProfSingleProcessPrivilege 3012 wmic.exe Token: SeIncBasePriorityPrivilege 3012 wmic.exe Token: SeCreatePagefilePrivilege 3012 wmic.exe Token: SeBackupPrivilege 3012 wmic.exe Token: SeRestorePrivilege 3012 wmic.exe Token: SeShutdownPrivilege 3012 wmic.exe Token: SeDebugPrivilege 3012 wmic.exe Token: SeSystemEnvironmentPrivilege 3012 wmic.exe Token: SeRemoteShutdownPrivilege 3012 wmic.exe Token: SeUndockPrivilege 3012 wmic.exe Token: SeManageVolumePrivilege 3012 wmic.exe Token: 33 3012 wmic.exe Token: 34 3012 wmic.exe Token: 35 3012 wmic.exe Token: SeIncreaseQuotaPrivilege 2572 wmic.exe Token: SeSecurityPrivilege 2572 wmic.exe Token: SeTakeOwnershipPrivilege 2572 wmic.exe Token: SeLoadDriverPrivilege 2572 wmic.exe Token: SeSystemProfilePrivilege 2572 wmic.exe Token: SeSystemtimePrivilege 2572 wmic.exe Token: SeProfSingleProcessPrivilege 2572 wmic.exe Token: SeIncBasePriorityPrivilege 2572 wmic.exe Token: SeCreatePagefilePrivilege 2572 wmic.exe Token: SeBackupPrivilege 2572 wmic.exe Token: SeRestorePrivilege 2572 wmic.exe Token: SeShutdownPrivilege 2572 wmic.exe Token: SeDebugPrivilege 2572 wmic.exe Token: SeSystemEnvironmentPrivilege 2572 wmic.exe Token: SeRemoteShutdownPrivilege 2572 wmic.exe Token: SeUndockPrivilege 2572 wmic.exe Token: SeManageVolumePrivilege 2572 wmic.exe Token: 33 2572 wmic.exe Token: 34 2572 wmic.exe Token: 35 2572 wmic.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 1684 wrote to memory of 2364 1684 45de70c85ece8763c685808eea085df4.exe 27 PID 1684 wrote to memory of 2364 1684 45de70c85ece8763c685808eea085df4.exe 27 PID 1684 wrote to memory of 2364 1684 45de70c85ece8763c685808eea085df4.exe 27 PID 1684 wrote to memory of 2364 1684 45de70c85ece8763c685808eea085df4.exe 27 PID 1684 wrote to memory of 2692 1684 45de70c85ece8763c685808eea085df4.exe 30 PID 1684 wrote to memory of 2692 1684 45de70c85ece8763c685808eea085df4.exe 30 PID 1684 wrote to memory of 2692 1684 45de70c85ece8763c685808eea085df4.exe 30 PID 1684 wrote to memory of 2692 1684 45de70c85ece8763c685808eea085df4.exe 30 PID 1684 wrote to memory of 2776 1684 45de70c85ece8763c685808eea085df4.exe 32 PID 1684 wrote to memory of 2776 1684 45de70c85ece8763c685808eea085df4.exe 32 PID 1684 wrote to memory of 2776 1684 45de70c85ece8763c685808eea085df4.exe 32 PID 1684 wrote to memory of 2776 1684 45de70c85ece8763c685808eea085df4.exe 32 PID 1684 wrote to memory of 3012 1684 45de70c85ece8763c685808eea085df4.exe 34 PID 1684 wrote to memory of 3012 1684 45de70c85ece8763c685808eea085df4.exe 34 PID 1684 wrote to memory of 3012 1684 45de70c85ece8763c685808eea085df4.exe 34 PID 1684 wrote to memory of 3012 1684 45de70c85ece8763c685808eea085df4.exe 34 PID 1684 wrote to memory of 2596 1684 45de70c85ece8763c685808eea085df4.exe 36 PID 1684 wrote to memory of 2596 1684 45de70c85ece8763c685808eea085df4.exe 36 PID 1684 wrote to memory of 2596 1684 45de70c85ece8763c685808eea085df4.exe 36 PID 1684 wrote to memory of 2596 1684 45de70c85ece8763c685808eea085df4.exe 36 PID 1684 wrote to memory of 2572 1684 45de70c85ece8763c685808eea085df4.exe 38 PID 1684 wrote to memory of 2572 1684 45de70c85ece8763c685808eea085df4.exe 38 PID 1684 wrote to memory of 2572 1684 45de70c85ece8763c685808eea085df4.exe 38 PID 1684 wrote to memory of 2572 1684 45de70c85ece8763c685808eea085df4.exe 38 PID 1512 wrote to memory of 3036 1512 taskeng.exe 45 PID 1512 wrote to memory of 3036 1512 taskeng.exe 45 PID 1512 wrote to memory of 3036 1512 taskeng.exe 45 PID 1512 wrote to memory of 3036 1512 taskeng.exe 45 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 45de70c85ece8763c685808eea085df4.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 45de70c85ece8763c685808eea085df4.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" 45de70c85ece8763c685808eea085df4.exe -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\45de70c85ece8763c685808eea085df4.exe"C:\Users\Admin\AppData\Local\Temp\45de70c85ece8763c685808eea085df4.exe"1⤵
- UAC bypass
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1684 -
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:2364
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2692
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:2776
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:3012
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:2596
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2572
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2736
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C:\Windows\system32\taskeng.exetaskeng.exe {7E6EA69A-AA12-45D7-A95D-1500650A16EB} S-1-5-21-2444714103-3190537498-3629098939-1000:DJLAPDMX\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:1512 -
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe2⤵
- Executes dropped EXE
PID:3036
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Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
1Disable or Modify Tools
1Indicator Removal
2File Deletion
2Modify Registry
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
669KB
MD545de70c85ece8763c685808eea085df4
SHA1c9dd5313a661fd17b154ccb17a36e8399fc933a5
SHA256d595339cbbf415eca195eb3a0d9a8b6c9ff82a0cf36e4e867f5cef24503bb532
SHA51203a1d922711db1afc0a512151371c9a97a7478578c11591109537b1427aeac8b3ac44aa52c83439afe56e20134fd888bcaee1632f6046ce8edf0d99622fb362d
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Filesize
536B
MD51fe8ea70da98ea4440af632dcfc3dd00
SHA154060a011c25f6b1a31f899656e96a0d7dcbf927
SHA256f1365c9d9353c22f097ac48f0c01d9108a1159ab116a3e71692d680d0e91838c
SHA512e748ad0241e032f52bd6ef110e51bb5f80223139c2eada54112c2e00c89863a9045cf32f99dbd30f99f79d6782bf88adf72c7fd3ae4dbc0f853e15473ecf9af3
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Filesize
5KB
MD52f039ec07baada20089e7e8ba19b0abb
SHA1f332390c98d1f5fe89076be8ffa8cc362e8904f1
SHA2566d7abe503afd32ac69ffb94590289fd38c8981bc7ce1c6db528b7190dcf471d7
SHA5125c04b3540f14c1b95d0f7dfb2bb29d131d02738d867d562d299504a64167c87621344e79ffb346565c9d5166d5b00951ee3b3f354f9dc47725dc7d3652f4062a