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Analysis
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max time kernel
162s -
max time network
164s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
28/11/2022, 18:25
Static task
static1
Behavioral task
behavioral1
Sample
0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f.exe
Resource
win10v2004-20220812-en
General
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Target
0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f.exe
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Size
1.4MB
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MD5
a3e5ec5555b57a904cc84a9b096ad420
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SHA1
6d5284c72fa32beb4a7fc7939e6b61e9d9b83eb4
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SHA256
0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f
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SHA512
134e418a2926520637a976ffc364a87a53e1d9e24ebfc5b0df9bfa701023ff6c394de5778e5e919a916218f38f51503b0580cd30121e831cba3e7f2538e7f0db
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SSDEEP
6144:AQbZvy6kqLkZLlUbHiJNnPwALifg9Ty2PoBISB5s2UJmh67OB0FARsKfpYT:A+pyXsmLlUri7PgI2XeOek671gsMps
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe" csrss.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe" winlogon.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe" winlogon.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe" csrss.exe -
Executes dropped EXE 1 IoCs
pid Process 3068 csrss.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation 0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f.exe Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation winlogon.exe -
Drops desktop.ini file(s) 2 IoCs
description ioc Process File created C:\Windows\assembly\Desktop.ini winlogon.exe File opened for modification C:\Windows\assembly\Desktop.ini winlogon.exe -
Drops file in Windows directory 3 IoCs
description ioc Process File opened for modification C:\Windows\assembly winlogon.exe File created C:\Windows\assembly\Desktop.ini winlogon.exe File opened for modification C:\Windows\assembly\Desktop.ini winlogon.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe 3068 csrss.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 4736 winlogon.exe -
Suspicious behavior: RenamesItself 1 IoCs
pid Process 3276 0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 4736 winlogon.exe Token: SeDebugPrivilege 4736 winlogon.exe Token: SeDebugPrivilege 3068 csrss.exe Token: SeDebugPrivilege 3068 csrss.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4736 winlogon.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 3276 wrote to memory of 4736 3276 0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f.exe 80 PID 3276 wrote to memory of 4736 3276 0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f.exe 80 PID 3276 wrote to memory of 4736 3276 0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f.exe 80 PID 4736 wrote to memory of 3068 4736 winlogon.exe 81 PID 4736 wrote to memory of 3068 4736 winlogon.exe 81 PID 4736 wrote to memory of 3068 4736 winlogon.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f.exe"C:\Users\Admin\AppData\Local\Temp\0c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f.exe"1⤵
- Checks computer location settings
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:3276 -
C:\Users\Admin\AppData\Roaming\winlogon.exe"C:\Users\Admin\AppData\Roaming\winlogon.exe"2⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4736 -
C:\Users\Admin\AppData\Roaming\csrss.exe"C:\Users\Admin\AppData\Roaming\csrss.exe" -reg "explorer.exe, C:\Users\Admin\AppData\Roaming\winlogon.exe" -proc 4736 C:\Users\Admin\AppData\Roaming\winlogon.exe3⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3068
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
1.4MB
MD5a3e5ec5555b57a904cc84a9b096ad420
SHA16d5284c72fa32beb4a7fc7939e6b61e9d9b83eb4
SHA2560c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f
SHA512134e418a2926520637a976ffc364a87a53e1d9e24ebfc5b0df9bfa701023ff6c394de5778e5e919a916218f38f51503b0580cd30121e831cba3e7f2538e7f0db
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Filesize
1.4MB
MD5a3e5ec5555b57a904cc84a9b096ad420
SHA16d5284c72fa32beb4a7fc7939e6b61e9d9b83eb4
SHA2560c9e091285c6d82f3c0140bb06266edb17c9cd3faab32835b1aded34f810fd3f
SHA512134e418a2926520637a976ffc364a87a53e1d9e24ebfc5b0df9bfa701023ff6c394de5778e5e919a916218f38f51503b0580cd30121e831cba3e7f2538e7f0db