Analysis
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max time kernel
148s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
06-01-2024 10:18
Behavioral task
behavioral1
Sample
45de70c85ece8763c685808eea085df4.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
45de70c85ece8763c685808eea085df4.exe
Resource
win10v2004-20231215-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/0x000b000000012261-901.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 (311) 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 1612 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-1-5-21-1603059206-2004189698-4139800220-1000\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) \??\L: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\U: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\X: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\J: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\E: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\I: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\O: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\P: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\Q: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\B: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\K: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\M: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\W: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\Y: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\Z: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\F: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\G: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\H: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\N: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\R: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\S: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\T: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\V: 45de70c85ece8763c685808eea085df4.exe File opened (read-only) \??\A: 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 2744 vssadmin.exe 2772 vssadmin.exe 2712 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe 1228 45de70c85ece8763c685808eea085df4.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
description pid Process Token: SeBackupPrivilege 2724 vssvc.exe Token: SeRestorePrivilege 2724 vssvc.exe Token: SeAuditPrivilege 2724 vssvc.exe Token: SeIncreaseQuotaPrivilege 2840 wmic.exe Token: SeSecurityPrivilege 2840 wmic.exe Token: SeTakeOwnershipPrivilege 2840 wmic.exe Token: SeLoadDriverPrivilege 2840 wmic.exe Token: SeSystemProfilePrivilege 2840 wmic.exe Token: SeSystemtimePrivilege 2840 wmic.exe Token: SeProfSingleProcessPrivilege 2840 wmic.exe Token: SeIncBasePriorityPrivilege 2840 wmic.exe Token: SeCreatePagefilePrivilege 2840 wmic.exe Token: SeBackupPrivilege 2840 wmic.exe Token: SeRestorePrivilege 2840 wmic.exe Token: SeShutdownPrivilege 2840 wmic.exe Token: SeDebugPrivilege 2840 wmic.exe Token: SeSystemEnvironmentPrivilege 2840 wmic.exe Token: SeRemoteShutdownPrivilege 2840 wmic.exe Token: SeUndockPrivilege 2840 wmic.exe Token: SeManageVolumePrivilege 2840 wmic.exe Token: 33 2840 wmic.exe Token: 34 2840 wmic.exe Token: 35 2840 wmic.exe Token: SeIncreaseQuotaPrivilege 2616 wmic.exe Token: SeSecurityPrivilege 2616 wmic.exe Token: SeTakeOwnershipPrivilege 2616 wmic.exe Token: SeLoadDriverPrivilege 2616 wmic.exe Token: SeSystemProfilePrivilege 2616 wmic.exe Token: SeSystemtimePrivilege 2616 wmic.exe Token: SeProfSingleProcessPrivilege 2616 wmic.exe Token: SeIncBasePriorityPrivilege 2616 wmic.exe Token: SeCreatePagefilePrivilege 2616 wmic.exe Token: SeBackupPrivilege 2616 wmic.exe Token: SeRestorePrivilege 2616 wmic.exe Token: SeShutdownPrivilege 2616 wmic.exe Token: SeDebugPrivilege 2616 wmic.exe Token: SeSystemEnvironmentPrivilege 2616 wmic.exe Token: SeRemoteShutdownPrivilege 2616 wmic.exe Token: SeUndockPrivilege 2616 wmic.exe Token: SeManageVolumePrivilege 2616 wmic.exe Token: 33 2616 wmic.exe Token: 34 2616 wmic.exe Token: 35 2616 wmic.exe Token: SeIncreaseQuotaPrivilege 2576 wmic.exe Token: SeSecurityPrivilege 2576 wmic.exe Token: SeTakeOwnershipPrivilege 2576 wmic.exe Token: SeLoadDriverPrivilege 2576 wmic.exe Token: SeSystemProfilePrivilege 2576 wmic.exe Token: SeSystemtimePrivilege 2576 wmic.exe Token: SeProfSingleProcessPrivilege 2576 wmic.exe Token: SeIncBasePriorityPrivilege 2576 wmic.exe Token: SeCreatePagefilePrivilege 2576 wmic.exe Token: SeBackupPrivilege 2576 wmic.exe Token: SeRestorePrivilege 2576 wmic.exe Token: SeShutdownPrivilege 2576 wmic.exe Token: SeDebugPrivilege 2576 wmic.exe Token: SeSystemEnvironmentPrivilege 2576 wmic.exe Token: SeRemoteShutdownPrivilege 2576 wmic.exe Token: SeUndockPrivilege 2576 wmic.exe Token: SeManageVolumePrivilege 2576 wmic.exe Token: 33 2576 wmic.exe Token: 34 2576 wmic.exe Token: 35 2576 wmic.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 1228 wrote to memory of 2772 1228 45de70c85ece8763c685808eea085df4.exe 28 PID 1228 wrote to memory of 2772 1228 45de70c85ece8763c685808eea085df4.exe 28 PID 1228 wrote to memory of 2772 1228 45de70c85ece8763c685808eea085df4.exe 28 PID 1228 wrote to memory of 2772 1228 45de70c85ece8763c685808eea085df4.exe 28 PID 1228 wrote to memory of 2840 1228 45de70c85ece8763c685808eea085df4.exe 32 PID 1228 wrote to memory of 2840 1228 45de70c85ece8763c685808eea085df4.exe 32 PID 1228 wrote to memory of 2840 1228 45de70c85ece8763c685808eea085df4.exe 32 PID 1228 wrote to memory of 2840 1228 45de70c85ece8763c685808eea085df4.exe 32 PID 1228 wrote to memory of 2712 1228 45de70c85ece8763c685808eea085df4.exe 33 PID 1228 wrote to memory of 2712 1228 45de70c85ece8763c685808eea085df4.exe 33 PID 1228 wrote to memory of 2712 1228 45de70c85ece8763c685808eea085df4.exe 33 PID 1228 wrote to memory of 2712 1228 45de70c85ece8763c685808eea085df4.exe 33 PID 1228 wrote to memory of 2616 1228 45de70c85ece8763c685808eea085df4.exe 35 PID 1228 wrote to memory of 2616 1228 45de70c85ece8763c685808eea085df4.exe 35 PID 1228 wrote to memory of 2616 1228 45de70c85ece8763c685808eea085df4.exe 35 PID 1228 wrote to memory of 2616 1228 45de70c85ece8763c685808eea085df4.exe 35 PID 1228 wrote to memory of 2744 1228 45de70c85ece8763c685808eea085df4.exe 38 PID 1228 wrote to memory of 2744 1228 45de70c85ece8763c685808eea085df4.exe 38 PID 1228 wrote to memory of 2744 1228 45de70c85ece8763c685808eea085df4.exe 38 PID 1228 wrote to memory of 2744 1228 45de70c85ece8763c685808eea085df4.exe 38 PID 1228 wrote to memory of 2576 1228 45de70c85ece8763c685808eea085df4.exe 39 PID 1228 wrote to memory of 2576 1228 45de70c85ece8763c685808eea085df4.exe 39 PID 1228 wrote to memory of 2576 1228 45de70c85ece8763c685808eea085df4.exe 39 PID 1228 wrote to memory of 2576 1228 45de70c85ece8763c685808eea085df4.exe 39 PID 2664 wrote to memory of 1612 2664 taskeng.exe 46 PID 2664 wrote to memory of 1612 2664 taskeng.exe 46 PID 2664 wrote to memory of 1612 2664 taskeng.exe 46 PID 2664 wrote to memory of 1612 2664 taskeng.exe 46 -
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:1228 -
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:2772
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2840
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:2712
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2616
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:2744
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2576
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2724
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C:\Windows\system32\taskeng.exetaskeng.exe {E765C05C-285C-49DC-9407-7331EDBF29A0} S-1-5-21-1603059206-2004189698-4139800220-1000:AILVMYUM\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:2664 -
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe2⤵
- Executes dropped EXE
PID:1612
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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
MD5a90faf655441ca757aadf431dbd002e5
SHA1cc09b68983943a120d82ad9a44a4c3e89d6d5a47
SHA25659d52113452e64f2f43fb8368c812568a2127bea242e60a499f57fd543b7af9c
SHA512945393906dd51d2b62f412ddcc4d081eb145416e73ccb69b1f86e588813da023e766b6d70b51c298680129a50d6f88e72ff5bceb5c322e2a1820d7e35a4062cc
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Filesize
5KB
MD5f3a83618eed87efe3f4152b831cb29e4
SHA1462f99e20d4e03a01ad6778da0d3b95150a7e3b5
SHA256ea4150ab1ecedc59130c30505217a5481f8931e56a726d215c0fcc5d91126c2d
SHA512b6c0b4e7eb3840eadbfc5b757fda4c096d34eac36a156016b8c27b684bb2b5a496614a73297c71d57cfd696507b0019a7e6a9f2cacb61c7e079da6f621e442ba