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03/05/2024, 18:03
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240503-wllncafb88 10Analysis
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max time kernel
67s -
max time network
70s -
platform
windows11-21h2_x64 -
resource
win11-20240426-en -
resource tags
arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system -
submitted
03/05/2024, 18:03
Behavioral task
behavioral1
Sample
ent.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
ent.exe
Resource
win10-20240404-en
Behavioral task
behavioral3
Sample
ent.exe
Resource
win10v2004-20240226-en
Errors
General
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Target
ent.exe
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Size
44KB
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MD5
211661398474b9c96a1d704823d0e552
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SHA1
5afcd1a87a69ea1c84a06fdf7079660133ceb28a
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SHA256
c43fa1f0bbfbb8f91d9a339b97922494bf790c6b58bf973b56836ef52a3196cd
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SHA512
51717923b8d063874d5216db14adbe506826715773845c17961c5e52ed072380ea8b9b75d55559f855e6f42c35c8dd984c055eb3d1f7bec02c62463423c96666
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SSDEEP
768:trlZa605WoOu+tpBERbGTHDUgkbZCfr2A33O3sh0l0E:tfq0u+tpKbAjXkbZCjjO3s60E
Malware Config
Extracted
xworm
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install_file
USB.exe
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pastebin_url
https://pastebin.com/raw/XzLzRHpk
Signatures
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Detect Xworm Payload 1 IoCs
resource yara_rule behavioral4/memory/3392-1-0x00000000006B0000-0x00000000006C2000-memory.dmp family_xworm -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
flow ioc 2 pastebin.com 1 pastebin.com 1 0.tcp.eu.ngrok.io -
Modifies data under HKEY_USERS 15 IoCs
description ioc Process Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365268" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365268" LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent LogonUI.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00 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\Explorer\Accent\AccentColorMenu = "4292114432" LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM 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 = "4292114432" 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\EnableWindowColorization = "118" 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 = "4290799360" 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\ColorizationBlurBalance = "1" LogonUI.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 3392 ent.exe Token: SeShutdownPrivilege 1032 shutdown.exe Token: SeRemoteShutdownPrivilege 1032 shutdown.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 760 LogonUI.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3392 wrote to memory of 1032 3392 ent.exe 82 PID 3392 wrote to memory of 1032 3392 ent.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\ent.exe"C:\Users\Admin\AppData\Local\Temp\ent.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3392 -
C:\Windows\SYSTEM32\shutdown.exeshutdown.exe /f /s /t 02⤵
- Suspicious use of AdjustPrivilegeToken
PID:1032
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C:\Windows\system32\LogonUI.exe"LogonUI.exe" /flags:0x4 /state0:0xa3a19055 /state1:0x41c64e6d1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:760