Analysis
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max time kernel
150s -
max time network
31s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
26-12-2022 19:26
Behavioral task
behavioral1
Sample
64_MEcip.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
64_MEcip.exe
Resource
win10v2004-20220812-en
General
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Target
64_MEcip.exe
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Size
666KB
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MD5
623256c79ccd20a1319f553f269b3867
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SHA1
a06b170b22424a87809d65171714a821d732831d
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SHA256
8c0cc36cba7d54c1c225c95ef0a05f95ed317ffdb17e952e452e6555a719a927
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SHA512
808cb0aa49799d33eb40e432d386b33341aadb220ff941dc5bd9d914baaafadd1c1dc646b24a8ff3a71890d1fd870f684876d8686909d2c902592d7b3fa81da4
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SSDEEP
12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAbC9+m:dd35lDbKDIwWUDyqS5ommC9+
Malware Config
Extracted
C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\!-Recovery_Instructions-!.html
<h2>[email protected]</h2>
https://tox.chat/download.html</p>
Signatures
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MedusaLocker
Ransomware with several variants first seen in September 2019.
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MedusaLocker payload 2 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Roaming\svhost.exe family_medusalocker C:\Users\Admin\AppData\Roaming\svhost.exe family_medusalocker -
Processes:
64_MEcip.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip.exe -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Executes dropped EXE 1 IoCs
Processes:
svhost.exepid process 1840 svhost.exe -
Modifies extensions of user files 4 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
64_MEcip.exedescription ioc process File renamed C:\Users\Admin\Pictures\DebugConnect.png => C:\Users\Admin\Pictures\DebugConnect.png.cipher 64_MEcip.exe File renamed C:\Users\Admin\Pictures\DisableRestart.crw => C:\Users\Admin\Pictures\DisableRestart.crw.cipher 64_MEcip.exe File renamed C:\Users\Admin\Pictures\ResumeSave.png => C:\Users\Admin\Pictures\ResumeSave.png.cipher 64_MEcip.exe File renamed C:\Users\Admin\Pictures\SyncUndo.tif => C:\Users\Admin\Pictures\SyncUndo.tif.cipher 64_MEcip.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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Processes:
64_MEcip.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip.exe -
Drops desktop.ini file(s) 1 IoCs
Processes:
64_MEcip.exedescription ioc process File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-3406023954-474543476-3319432036-1000\desktop.ini 64_MEcip.exe -
Enumerates connected drives 3 TTPs 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
64_MEcip.exedescription ioc process File opened (read-only) \??\F: 64_MEcip.exe File opened (read-only) \??\J: 64_MEcip.exe File opened (read-only) \??\K: 64_MEcip.exe File opened (read-only) \??\M: 64_MEcip.exe File opened (read-only) \??\S: 64_MEcip.exe File opened (read-only) \??\U: 64_MEcip.exe File opened (read-only) \??\V: 64_MEcip.exe File opened (read-only) \??\G: 64_MEcip.exe File opened (read-only) \??\H: 64_MEcip.exe File opened (read-only) \??\O: 64_MEcip.exe File opened (read-only) \??\P: 64_MEcip.exe File opened (read-only) \??\R: 64_MEcip.exe File opened (read-only) \??\W: 64_MEcip.exe File opened (read-only) \??\Y: 64_MEcip.exe File opened (read-only) \??\A: 64_MEcip.exe File opened (read-only) \??\B: 64_MEcip.exe File opened (read-only) \??\E: 64_MEcip.exe File opened (read-only) \??\I: 64_MEcip.exe File opened (read-only) \??\Q: 64_MEcip.exe File opened (read-only) \??\L: 64_MEcip.exe File opened (read-only) \??\N: 64_MEcip.exe File opened (read-only) \??\T: 64_MEcip.exe File opened (read-only) \??\X: 64_MEcip.exe File opened (read-only) \??\Z: 64_MEcip.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.
Processes:
vssadmin.exevssadmin.exevssadmin.exepid process 1836 vssadmin.exe 1772 vssadmin.exe 704 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
64_MEcip.exepid process 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe 1564 64_MEcip.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
Processes:
vssvc.exewmic.exewmic.exewmic.exedescription pid process Token: SeBackupPrivilege 572 vssvc.exe Token: SeRestorePrivilege 572 vssvc.exe Token: SeAuditPrivilege 572 vssvc.exe Token: SeIncreaseQuotaPrivilege 1880 wmic.exe Token: SeSecurityPrivilege 1880 wmic.exe Token: SeTakeOwnershipPrivilege 1880 wmic.exe Token: SeLoadDriverPrivilege 1880 wmic.exe Token: SeSystemProfilePrivilege 1880 wmic.exe Token: SeSystemtimePrivilege 1880 wmic.exe Token: SeProfSingleProcessPrivilege 1880 wmic.exe Token: SeIncBasePriorityPrivilege 1880 wmic.exe Token: SeCreatePagefilePrivilege 1880 wmic.exe Token: SeBackupPrivilege 1880 wmic.exe Token: SeRestorePrivilege 1880 wmic.exe Token: SeShutdownPrivilege 1880 wmic.exe Token: SeDebugPrivilege 1880 wmic.exe Token: SeSystemEnvironmentPrivilege 1880 wmic.exe Token: SeRemoteShutdownPrivilege 1880 wmic.exe Token: SeUndockPrivilege 1880 wmic.exe Token: SeManageVolumePrivilege 1880 wmic.exe Token: 33 1880 wmic.exe Token: 34 1880 wmic.exe Token: 35 1880 wmic.exe Token: SeIncreaseQuotaPrivilege 1144 wmic.exe Token: SeSecurityPrivilege 1144 wmic.exe Token: SeTakeOwnershipPrivilege 1144 wmic.exe Token: SeLoadDriverPrivilege 1144 wmic.exe Token: SeSystemProfilePrivilege 1144 wmic.exe Token: SeSystemtimePrivilege 1144 wmic.exe Token: SeProfSingleProcessPrivilege 1144 wmic.exe Token: SeIncBasePriorityPrivilege 1144 wmic.exe Token: SeCreatePagefilePrivilege 1144 wmic.exe Token: SeBackupPrivilege 1144 wmic.exe Token: SeRestorePrivilege 1144 wmic.exe Token: SeShutdownPrivilege 1144 wmic.exe Token: SeDebugPrivilege 1144 wmic.exe Token: SeSystemEnvironmentPrivilege 1144 wmic.exe Token: SeRemoteShutdownPrivilege 1144 wmic.exe Token: SeUndockPrivilege 1144 wmic.exe Token: SeManageVolumePrivilege 1144 wmic.exe Token: 33 1144 wmic.exe Token: 34 1144 wmic.exe Token: 35 1144 wmic.exe Token: SeIncreaseQuotaPrivilege 1768 wmic.exe Token: SeSecurityPrivilege 1768 wmic.exe Token: SeTakeOwnershipPrivilege 1768 wmic.exe Token: SeLoadDriverPrivilege 1768 wmic.exe Token: SeSystemProfilePrivilege 1768 wmic.exe Token: SeSystemtimePrivilege 1768 wmic.exe Token: SeProfSingleProcessPrivilege 1768 wmic.exe Token: SeIncBasePriorityPrivilege 1768 wmic.exe Token: SeCreatePagefilePrivilege 1768 wmic.exe Token: SeBackupPrivilege 1768 wmic.exe Token: SeRestorePrivilege 1768 wmic.exe Token: SeShutdownPrivilege 1768 wmic.exe Token: SeDebugPrivilege 1768 wmic.exe Token: SeSystemEnvironmentPrivilege 1768 wmic.exe Token: SeRemoteShutdownPrivilege 1768 wmic.exe Token: SeUndockPrivilege 1768 wmic.exe Token: SeManageVolumePrivilege 1768 wmic.exe Token: 33 1768 wmic.exe Token: 34 1768 wmic.exe Token: 35 1768 wmic.exe -
Suspicious use of WriteProcessMemory 28 IoCs
Processes:
64_MEcip.exetaskeng.exedescription pid process target process PID 1564 wrote to memory of 1772 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 1772 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 1772 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 1772 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 1880 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 1880 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 1880 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 1880 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 704 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 704 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 704 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 704 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 1144 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 1144 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 1144 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 1144 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 1836 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 1836 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 1836 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 1836 1564 64_MEcip.exe vssadmin.exe PID 1564 wrote to memory of 1768 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 1768 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 1768 1564 64_MEcip.exe wmic.exe PID 1564 wrote to memory of 1768 1564 64_MEcip.exe wmic.exe PID 1640 wrote to memory of 1840 1640 taskeng.exe svhost.exe PID 1640 wrote to memory of 1840 1640 taskeng.exe svhost.exe PID 1640 wrote to memory of 1840 1640 taskeng.exe svhost.exe PID 1640 wrote to memory of 1840 1640 taskeng.exe svhost.exe -
System policy modification 1 TTPs 3 IoCs
Processes:
64_MEcip.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" 64_MEcip.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\64_MEcip.exe"C:\Users\Admin\AppData\Local\Temp\64_MEcip.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:1564 -
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1772
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1880
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:704
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1144
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1836
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1768
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:572
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C:\Windows\system32\taskeng.exetaskeng.exe {544CF9D4-543B-4500-A8E0-9E6E0354537E} S-1-5-21-3406023954-474543476-3319432036-1000:VUIIVLGQ\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:1640 -
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe2⤵
- Executes dropped EXE
PID:1840
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
666KB
MD5623256c79ccd20a1319f553f269b3867
SHA1a06b170b22424a87809d65171714a821d732831d
SHA2568c0cc36cba7d54c1c225c95ef0a05f95ed317ffdb17e952e452e6555a719a927
SHA512808cb0aa49799d33eb40e432d386b33341aadb220ff941dc5bd9d914baaafadd1c1dc646b24a8ff3a71890d1fd870f684876d8686909d2c902592d7b3fa81da4
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Filesize
666KB
MD5623256c79ccd20a1319f553f269b3867
SHA1a06b170b22424a87809d65171714a821d732831d
SHA2568c0cc36cba7d54c1c225c95ef0a05f95ed317ffdb17e952e452e6555a719a927
SHA512808cb0aa49799d33eb40e432d386b33341aadb220ff941dc5bd9d914baaafadd1c1dc646b24a8ff3a71890d1fd870f684876d8686909d2c902592d7b3fa81da4