Analysis
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max time kernel
151s -
max time network
44s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
26-12-2022 19:26
Behavioral task
behavioral1
Sample
64_MEcip4.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
64_MEcip4.exe
Resource
win10v2004-20220812-en
General
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Target
64_MEcip4.exe
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Size
666KB
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MD5
bb442cfc088a89e0c353ed20fb8cbf8b
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SHA1
1477ae595f2fb3cf7ffdee788b748db253236d0c
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SHA256
f0c2c9663215a97b04f1f97cb34c99c2cf06ba502fd1f1ad4922ead45fa442a6
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SHA512
ea2b42aa7e9aab775cf607ba0e5034edde3b07a1d913109337cd32bff4f45f6d054e434ccbccdc5a0dbf6901db7431d279c11f8dd8b1b56af1f84dfc3006f5e4
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SSDEEP
12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulA2C9+m:dd35lDbKDIwWUDyqS5omTC9+
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_MEcip4.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip4.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip4.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 1084 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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Processes:
64_MEcip4.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip4.exe -
Drops desktop.ini file(s) 1 IoCs
Processes:
64_MEcip4.exedescription ioc process File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-999675638-2867687379-27515722-1000\desktop.ini 64_MEcip4.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_MEcip4.exedescription ioc process File opened (read-only) \??\I: 64_MEcip4.exe File opened (read-only) \??\K: 64_MEcip4.exe File opened (read-only) \??\N: 64_MEcip4.exe File opened (read-only) \??\T: 64_MEcip4.exe File opened (read-only) \??\V: 64_MEcip4.exe File opened (read-only) \??\X: 64_MEcip4.exe File opened (read-only) \??\M: 64_MEcip4.exe File opened (read-only) \??\S: 64_MEcip4.exe File opened (read-only) \??\Z: 64_MEcip4.exe File opened (read-only) \??\A: 64_MEcip4.exe File opened (read-only) \??\G: 64_MEcip4.exe File opened (read-only) \??\H: 64_MEcip4.exe File opened (read-only) \??\O: 64_MEcip4.exe File opened (read-only) \??\R: 64_MEcip4.exe File opened (read-only) \??\U: 64_MEcip4.exe File opened (read-only) \??\W: 64_MEcip4.exe File opened (read-only) \??\Y: 64_MEcip4.exe File opened (read-only) \??\B: 64_MEcip4.exe File opened (read-only) \??\E: 64_MEcip4.exe File opened (read-only) \??\F: 64_MEcip4.exe File opened (read-only) \??\J: 64_MEcip4.exe File opened (read-only) \??\L: 64_MEcip4.exe File opened (read-only) \??\P: 64_MEcip4.exe File opened (read-only) \??\Q: 64_MEcip4.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 1452 vssadmin.exe 524 vssadmin.exe 976 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
64_MEcip4.exepid process 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe 1872 64_MEcip4.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
Processes:
vssvc.exewmic.exewmic.exewmic.exedescription pid process Token: SeBackupPrivilege 1652 vssvc.exe Token: SeRestorePrivilege 1652 vssvc.exe Token: SeAuditPrivilege 1652 vssvc.exe Token: SeIncreaseQuotaPrivilege 948 wmic.exe Token: SeSecurityPrivilege 948 wmic.exe Token: SeTakeOwnershipPrivilege 948 wmic.exe Token: SeLoadDriverPrivilege 948 wmic.exe Token: SeSystemProfilePrivilege 948 wmic.exe Token: SeSystemtimePrivilege 948 wmic.exe Token: SeProfSingleProcessPrivilege 948 wmic.exe Token: SeIncBasePriorityPrivilege 948 wmic.exe Token: SeCreatePagefilePrivilege 948 wmic.exe Token: SeBackupPrivilege 948 wmic.exe Token: SeRestorePrivilege 948 wmic.exe Token: SeShutdownPrivilege 948 wmic.exe Token: SeDebugPrivilege 948 wmic.exe Token: SeSystemEnvironmentPrivilege 948 wmic.exe Token: SeRemoteShutdownPrivilege 948 wmic.exe Token: SeUndockPrivilege 948 wmic.exe Token: SeManageVolumePrivilege 948 wmic.exe Token: 33 948 wmic.exe Token: 34 948 wmic.exe Token: 35 948 wmic.exe Token: SeIncreaseQuotaPrivilege 1808 wmic.exe Token: SeSecurityPrivilege 1808 wmic.exe Token: SeTakeOwnershipPrivilege 1808 wmic.exe Token: SeLoadDriverPrivilege 1808 wmic.exe Token: SeSystemProfilePrivilege 1808 wmic.exe Token: SeSystemtimePrivilege 1808 wmic.exe Token: SeProfSingleProcessPrivilege 1808 wmic.exe Token: SeIncBasePriorityPrivilege 1808 wmic.exe Token: SeCreatePagefilePrivilege 1808 wmic.exe Token: SeBackupPrivilege 1808 wmic.exe Token: SeRestorePrivilege 1808 wmic.exe Token: SeShutdownPrivilege 1808 wmic.exe Token: SeDebugPrivilege 1808 wmic.exe Token: SeSystemEnvironmentPrivilege 1808 wmic.exe Token: SeRemoteShutdownPrivilege 1808 wmic.exe Token: SeUndockPrivilege 1808 wmic.exe Token: SeManageVolumePrivilege 1808 wmic.exe Token: 33 1808 wmic.exe Token: 34 1808 wmic.exe Token: 35 1808 wmic.exe Token: SeIncreaseQuotaPrivilege 956 wmic.exe Token: SeSecurityPrivilege 956 wmic.exe Token: SeTakeOwnershipPrivilege 956 wmic.exe Token: SeLoadDriverPrivilege 956 wmic.exe Token: SeSystemProfilePrivilege 956 wmic.exe Token: SeSystemtimePrivilege 956 wmic.exe Token: SeProfSingleProcessPrivilege 956 wmic.exe Token: SeIncBasePriorityPrivilege 956 wmic.exe Token: SeCreatePagefilePrivilege 956 wmic.exe Token: SeBackupPrivilege 956 wmic.exe Token: SeRestorePrivilege 956 wmic.exe Token: SeShutdownPrivilege 956 wmic.exe Token: SeDebugPrivilege 956 wmic.exe Token: SeSystemEnvironmentPrivilege 956 wmic.exe Token: SeRemoteShutdownPrivilege 956 wmic.exe Token: SeUndockPrivilege 956 wmic.exe Token: SeManageVolumePrivilege 956 wmic.exe Token: 33 956 wmic.exe Token: 34 956 wmic.exe Token: 35 956 wmic.exe -
Suspicious use of WriteProcessMemory 28 IoCs
Processes:
64_MEcip4.exetaskeng.exedescription pid process target process PID 1872 wrote to memory of 1452 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 1452 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 1452 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 1452 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 948 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 948 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 948 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 948 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 524 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 524 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 524 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 524 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 1808 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 1808 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 1808 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 1808 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 976 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 976 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 976 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 976 1872 64_MEcip4.exe vssadmin.exe PID 1872 wrote to memory of 956 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 956 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 956 1872 64_MEcip4.exe wmic.exe PID 1872 wrote to memory of 956 1872 64_MEcip4.exe wmic.exe PID 1180 wrote to memory of 1084 1180 taskeng.exe svhost.exe PID 1180 wrote to memory of 1084 1180 taskeng.exe svhost.exe PID 1180 wrote to memory of 1084 1180 taskeng.exe svhost.exe PID 1180 wrote to memory of 1084 1180 taskeng.exe svhost.exe -
System policy modification 1 TTPs 3 IoCs
Processes:
64_MEcip4.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 64_MEcip4.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 64_MEcip4.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" 64_MEcip4.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\64_MEcip4.exe"C:\Users\Admin\AppData\Local\Temp\64_MEcip4.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:1872 -
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1452
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:948
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:524
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1808
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:976
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:956
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1652
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C:\Windows\system32\taskeng.exetaskeng.exe {BED40A42-45E4-4ED3-A3C5-FCA4846A9841} S-1-5-21-999675638-2867687379-27515722-1000:ORXGKKZC\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:1180 -
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe2⤵
- Executes dropped EXE
PID:1084
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
666KB
MD5bb442cfc088a89e0c353ed20fb8cbf8b
SHA11477ae595f2fb3cf7ffdee788b748db253236d0c
SHA256f0c2c9663215a97b04f1f97cb34c99c2cf06ba502fd1f1ad4922ead45fa442a6
SHA512ea2b42aa7e9aab775cf607ba0e5034edde3b07a1d913109337cd32bff4f45f6d054e434ccbccdc5a0dbf6901db7431d279c11f8dd8b1b56af1f84dfc3006f5e4
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Filesize
666KB
MD5bb442cfc088a89e0c353ed20fb8cbf8b
SHA11477ae595f2fb3cf7ffdee788b748db253236d0c
SHA256f0c2c9663215a97b04f1f97cb34c99c2cf06ba502fd1f1ad4922ead45fa442a6
SHA512ea2b42aa7e9aab775cf607ba0e5034edde3b07a1d913109337cd32bff4f45f6d054e434ccbccdc5a0dbf6901db7431d279c11f8dd8b1b56af1f84dfc3006f5e4