Analysis
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max time kernel
25s -
max time network
20s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
07/06/2024, 02:40
General
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Target
loader.exe
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Size
4.1MB
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MD5
9ecdc9ed1bea6c226f92d740d43400b9
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SHA1
b5b5066cd4284733d8c3f3d7de3ca6653091ae10
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SHA256
60c57f14c2e0e0df0bda16646b21dddceaee0159dafbbb8daba310d4e1b5be6c
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SHA512
30bc705a2438288e3647d5adfc6119d751823970972b9c6b39a60384a2b7ac261986026b8d1c0b0ca7ee3d7e95363c97b873fdc5fad4096c903cb4e15bf57e43
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SSDEEP
98304:vnUGAC+hqc8lqvdzw2nsNKYYURyc9JirsN4JzmUPj:PTn2qcUzp6UYeJRCxPj
Malware Config
Signatures
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ loader.exe -
Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion loader.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion loader.exe -
resource yara_rule behavioral1/memory/4936-0-0x00007FF753D60000-0x00007FF7547FF000-memory.dmp themida behavioral1/memory/4936-2-0x00007FF753D60000-0x00007FF7547FF000-memory.dmp themida behavioral1/memory/4936-3-0x00007FF753D60000-0x00007FF7547FF000-memory.dmp themida behavioral1/memory/4936-4-0x00007FF753D60000-0x00007FF7547FF000-memory.dmp themida behavioral1/memory/4936-8-0x00007FF753D60000-0x00007FF7547FF000-memory.dmp themida behavioral1/memory/4936-5-0x00007FF753D60000-0x00007FF7547FF000-memory.dmp themida behavioral1/memory/4936-7-0x00007FF753D60000-0x00007FF7547FF000-memory.dmp themida behavioral1/memory/4936-6-0x00007FF753D60000-0x00007FF7547FF000-memory.dmp themida behavioral1/memory/4936-9-0x00007FF753D60000-0x00007FF7547FF000-memory.dmp themida behavioral1/memory/4936-10-0x00007FF753D60000-0x00007FF7547FF000-memory.dmp themida -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA loader.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
pid Process 4936 loader.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 4936 loader.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4936 loader.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 4936 wrote to memory of 2736 4936 loader.exe 88 PID 4936 wrote to memory of 2736 4936 loader.exe 88 PID 2736 wrote to memory of 3836 2736 cmd.exe 90 PID 2736 wrote to memory of 3836 2736 cmd.exe 90 PID 2736 wrote to memory of 1912 2736 cmd.exe 91 PID 2736 wrote to memory of 1912 2736 cmd.exe 91 PID 2736 wrote to memory of 3136 2736 cmd.exe 92 PID 2736 wrote to memory of 3136 2736 cmd.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\loader.exe"C:\Users\Admin\AppData\Local\Temp\loader.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4936 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\loader.exe" MD5 | find /i /v "md5" | find /i /v "certutil"2⤵
- Suspicious use of WriteProcessMemory
PID:2736 -
C:\Windows\system32\certutil.execertutil -hashfile "C:\Users\Admin\AppData\Local\Temp\loader.exe" MD53⤵PID:3836
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C:\Windows\system32\find.exefind /i /v "md5"3⤵PID:1912
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C:\Windows\system32\find.exefind /i /v "certutil"3⤵PID:3136
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