Analysis
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max time kernel
118s -
max time network
121s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
25-11-2022 19:31
Behavioral task
behavioral1
Sample
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe
Resource
win10v2004-20220812-en
Errors
General
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Target
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe
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Size
590KB
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MD5
88308074e4db96772825ed3e257c0adb
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SHA1
a356c2e2ecfaade0c62b361d89eb058784f78c4d
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SHA256
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1
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SHA512
dfb45a5204250e0c35ff3775db6f2610d6b182d97258b6253fabe6c614141f2ed75168e61cbd8250f60398e9f894c8d3e713e14f1e2b529bc9d1a87ce8f63717
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SSDEEP
12288:J6Wq4aaE6KwyF5L0Y2D1PqLc0WLakcXhjtI2RTDXoLsa0P6p:fthEVaPqLCLvcXh5I2RTMCQ
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 4 IoCs
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe -
Disables RegEdit via registry modification 1 IoCs
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exedescription ioc process Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe -
Disables Task Manager via registry modification
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Processes:
resource yara_rule behavioral2/memory/3172-132-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral2/memory/3172-133-0x0000000000400000-0x00000000004BA000-memory.dmp upx -
Drops startup file 1 IoCs
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ja.lnk ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe -
AutoIT Executable 2 IoCs
AutoIT scripts compiled to PE executables.
Processes:
resource yara_rule behavioral2/memory/3172-132-0x0000000000400000-0x00000000004BA000-memory.dmp autoit_exe behavioral2/memory/3172-133-0x0000000000400000-0x00000000004BA000-memory.dmp autoit_exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies Internet Explorer Protected Mode 1 TTPs 5 IoCs
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exedescription ioc process Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0\2500 = "3" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1\2500 = "3" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2\2500 = "3" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\2500 = "3" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4\2500 = "3" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe -
Modifies Internet Explorer Protected Mode Banner 1 TTPs 1 IoCs
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exedescription ioc process Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\NoProtectedModeBanner = "1" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe -
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe -
Modifies data under HKEY_USERS 15 IoCs
Processes:
LogonUI.exedescription ioc process Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271" LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" LogonUI.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00 LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808" LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "174" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" LogonUI.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exepid process 3172 ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe 3172 ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe 3172 ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe 3172 ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exepid process 3172 ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exedescription pid process Token: SeShutdownPrivilege 3172 ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe -
Suspicious use of SetWindowsHookEx 3 IoCs
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exeLogonUI.exepid process 3172 ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe 3172 ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe 1132 LogonUI.exe -
System policy modification 1 TTPs 8 IoCs
Processes:
ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDesktop = "1" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Associations ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Associations\DefaultFileTypeRisk = "1807" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Associations\LowRiskFileTypes = ".exe" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Associations\ModRiskFileTypes = ".doc;.pdf;.xls;.exe" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoViewContextMenu = "1" ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe Key created \REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe"C:\Users\Admin\AppData\Local\Temp\ef745b3e0b695e3f29eb20e3d1a8524afabdd8eb59457239af76021556c39ca1.exe"1⤵
- Modifies WinLogon for persistence
- Disables RegEdit via registry modification
- Drops startup file
- Modifies Internet Explorer Protected Mode
- Modifies Internet Explorer Protected Mode Banner
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- System policy modification
PID:3172
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C:\Windows\system32\LogonUI.exe"LogonUI.exe" /flags:0x4 /state0:0xa39d7855 /state1:0x41c64e6d1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:1132