Analysis
- max time kernel
150s - max time network
152s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260617-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
29/06/2026, 04:25
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe
Resource
win10v2004-20260513-en
7 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe
Resource
win11ltsc2024-20260617-en
7 signatures
150 seconds
General
- Target 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe
- Size 22.2MB
- Sample260629-e196tacz9w
- SHA256 21c7c43a8a1dd4de4537f22bce872c936a839c1fc873950ad200dadc0110104b
- MD5 a2da6c5435979561b964c7439a2427ec
- SHA1 f6444f630196ce6e9abf2f7ef7956f3474124853
- SHA512 f4c078c1507c9d8e1709f421a30a864aa0b28a4e494b30fd42ef0bf6d9be751bf9e3ec1e60bd0cec8c66f046050fd3dff6dd80b8d079243ae781d585291ab37b
- SSDEEP 393216:WJI1qj1LIX9yzxufTZLwubpBL64IUSy0Dq4brwSnGHx6alvmef7uNGc5zrA8H1rq:WJIIBUtyzxuf2WpBL67Q0W4HZnGHhzCS
- TLSH T189373345B8D8117CF0EAC731E1068EEDF986397CAC76B90F7B8249512930AE7CD12B56
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
Malware Config
Signatures
- Checks BIOS information in registry 2 TTPs 1 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe - Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
description ioc Process File opened for modification \??\PHYSICALDRIVE0 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe - Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
pid Process 5324 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe 5324 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe - Drops file in Program Files directory 1 IoCs
description ioc Process File created C:\Program Files\checkwritepermissions.exe 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe - 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 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe - Enumerates system info in registry 2 TTPs 2 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe - Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 5324 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe 5324 2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe"C:\Users\Admin\AppData\Local\Temp\2026-06-27_a2da6c5435979561b964c7439a2427ec_mespinoza.exe"1⤵
- Checks BIOS information in registry
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
PID:5324