Analysis
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max time kernel
97s -
max time network
99s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
20-06-2024 05:48
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
电脑屏幕保护截图.exe
Resource
win7-20240419-en
windows7-x64
9 signatures
150 seconds
Behavioral task
behavioral2
Sample
电脑屏幕保护截图.exe
Resource
win10v2004-20240611-en
windows10-2004-x64
11 signatures
150 seconds
Errors
Reason
Machine shutdown
General
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Target
电脑屏幕保护截图.exe
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Size
155KB
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MD5
8f3eb752ed2948f6ac4ffe9c376c2fa4
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SHA1
c327fe1ec70e0a3f5d2123e5068b73c279f04aad
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SHA256
5b138e0c61dbfab900f60cc9baad08fde46271ce139cae25e8d3bac7d76310fc
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SHA512
f69b0ec70125d47f8043876232c22548ebfa325416b2d71207c55ac1d22bdf0525794342a5d428394114f75b6a04edf3e3cdcd6fc6e9f70594c89909eb9033c8
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SSDEEP
3072:juixvadwbOz/2usL+7O9zq+L7aGHJvbqBzN89moRFi4RaIOFjnlg7PwYd:S1wbOyJC7azqq71pve9N89J3XTK4PwYd
Score
8/10
Malware Config
Signatures
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Blocklisted process makes network request 2 IoCs
flow pid Process 14 4040 rundll32.exe 26 4040 rundll32.exe -
resource yara_rule behavioral2/memory/4040-3-0x0000000010000000-0x0000000010193000-memory.dmp upx behavioral2/memory/4040-6-0x0000000010000000-0x0000000010193000-memory.dmp upx behavioral2/memory/4040-7-0x0000000010000000-0x0000000010193000-memory.dmp upx behavioral2/memory/4040-8-0x0000000010000000-0x0000000010193000-memory.dmp upx behavioral2/memory/4040-10-0x0000000010000000-0x0000000010193000-memory.dmp upx -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft = "C:\\Users\\Admin\\AppData\\Local\\Temp\\电脑屏幕保护截图.exe" 电脑屏幕保护截图.exe -
Enumerates connected drives 3 TTPs 22 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\L: rundll32.exe File opened (read-only) \??\O: rundll32.exe File opened (read-only) \??\R: rundll32.exe File opened (read-only) \??\B: rundll32.exe File opened (read-only) \??\E: rundll32.exe File opened (read-only) \??\G: rundll32.exe File opened (read-only) \??\I: rundll32.exe File opened (read-only) \??\K: rundll32.exe File opened (read-only) \??\W: rundll32.exe File opened (read-only) \??\Z: rundll32.exe File opened (read-only) \??\U: rundll32.exe File opened (read-only) \??\H: rundll32.exe File opened (read-only) \??\M: rundll32.exe File opened (read-only) \??\N: rundll32.exe File opened (read-only) \??\S: rundll32.exe File opened (read-only) \??\T: rundll32.exe File opened (read-only) \??\J: rundll32.exe File opened (read-only) \??\Q: rundll32.exe File opened (read-only) \??\V: rundll32.exe File opened (read-only) \??\X: rundll32.exe File opened (read-only) \??\P: rundll32.exe File opened (read-only) \??\Y: rundll32.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2648 set thread context of 4040 2648 电脑屏幕保护截图.exe 85 -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz rundll32.exe -
Modifies data under HKEY_USERS 15 IoCs
description ioc Process Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00 LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" 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\EnableWindowColorization = "120" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271" LogonUI.exe 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 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271" LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent 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\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040" LogonUI.exe -
Suspicious behavior: EnumeratesProcesses 22 IoCs
pid Process 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe 4040 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeShutdownPrivilege 4040 rundll32.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1348 LogonUI.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2648 wrote to memory of 4040 2648 电脑屏幕保护截图.exe 85 PID 2648 wrote to memory of 4040 2648 电脑屏幕保护截图.exe 85 PID 2648 wrote to memory of 4040 2648 电脑屏幕保护截图.exe 85 PID 2648 wrote to memory of 4040 2648 电脑屏幕保护截图.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\电脑屏幕保护截图.exe"C:\Users\Admin\AppData\Local\Temp\电脑屏幕保护截图.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2648 -
C:\Windows\SysWOW64\rundll32.exerundll322⤵
- Blocklisted process makes network request
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4040
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C:\Windows\system32\LogonUI.exe"LogonUI.exe" /flags:0x4 /state0:0xa3978055 /state1:0x41c64e6d1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:1348