Analysis
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max time kernel
150s -
max time network
124s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
18-05-2021 12:54
Static task
static1
Behavioral task
behavioral1
Sample
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe
Resource
win7v20210410
Behavioral task
behavioral2
Sample
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe
Resource
win10v20210410
General
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Target
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe
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Size
691KB
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MD5
3ae8274d34fb349448d7c6b7e735bc68
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SHA1
7f47a0075c445b26113e7122a77d9313e9770056
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SHA256
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20
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SHA512
c7729bca31a7d1da7a204e76a95a6de39fbf7bdbecb2772971a64053198aa993f8b156962f122c460ef8f39a73b2331d7f5725c7175b84fbb475ed42d71535e9
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 2 IoCs
Processes:
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe" 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe," 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe -
Modifies system executable filetype association 2 TTPs 1 IoCs
Processes:
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\drivers\\spools.exe \"%1\" %*" 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe -
Drops file in Drivers directory 2 IoCs
Processes:
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exedescription ioc process File created C:\Windows\SysWOW64\drivers\spools.exe 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe File opened for modification C:\Windows\SysWOW64\drivers\spools.exe 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe -
Sets service image path in registry 2 TTPs
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Adds Run key to start application 2 TTPs 4 IoCs
Processes:
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\cftmon.exe" 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe Set value (str) \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe Set value (str) \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\cftmon.exe" 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe -
Installs/modifies Browser Helper Object 2 TTPs
BHOs are DLL modules which act as plugins for Internet Explorer.
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Modifies WinLogon 2 TTPs 1 IoCs
Processes:
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UIHost = "logonui.exe" 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe -
Modifies registry class 1 IoCs
Processes:
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\drivers\\spools.exe \"%1\" %*" 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exedescription pid process target process PID 3400 wrote to memory of 1000 3400 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe reg.exe PID 3400 wrote to memory of 1000 3400 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe reg.exe PID 3400 wrote to memory of 1000 3400 8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe reg.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe"C:\Users\Admin\AppData\Local\Temp\8b68b523321199f5205d532860dd65ce444235a688c1771b147fd88a432f1e20.exe"1⤵
- Modifies WinLogon for persistence
- Modifies system executable filetype association
- Drops file in Drivers directory
- Adds Run key to start application
- Modifies WinLogon
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exereg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f2⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/1000-114-0x0000000000000000-mapping.dmp