Overview
overview
3Static
static
3Guna.UI2.dll
windows10-ltsc_2021-x64
1Guna.UI2.dll
windows11-21h2-x64
1Guna.UI2.dll
windows11-ltsc_2024-x64
1VirusBuilder.exe
windows10-ltsc_2021-x64
3VirusBuilder.exe
windows11-21h2-x64
3VirusBuilder.exe
windows11-ltsc_2024-x64
3nasm.exe
windows10-ltsc_2021-x64
3nasm.exe
windows11-21h2-x64
3nasm.exe
windows11-ltsc_2024-x64
3Analysis
- max time kernel
149s - max time network
147s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260911-en - resource tags
arch:x64arch:x86image:win10ltsc2021-20260911-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows - submitted
23/10/2026, 14:01
Static task
static1
Behavioral task
behavioral1
Sample
Guna.UI2.dll
Resource
win10ltsc2021-20260911-en
Behavioral task
behavioral2
Sample
Guna.UI2.dll
Resource
win11-20260911-en
Behavioral task
behavioral3
Sample
Guna.UI2.dll
Resource
win11ltsc2024-20260911-en
Behavioral task
behavioral4
Sample
VirusBuilder.exe
Resource
win10ltsc2021-20260911-en
Behavioral task
behavioral5
Sample
VirusBuilder.exe
Resource
win11-20260911-en
Behavioral task
behavioral6
Sample
VirusBuilder.exe
Resource
win11ltsc2024-20260911-en
Behavioral task
behavioral7
Sample
nasm.exe
Resource
win10ltsc2021-20260911-en
Behavioral task
behavioral8
Sample
nasm.exe
Resource
win11-20260911-en
Behavioral task
behavioral9
Sample
nasm.exe
Resource
win11ltsc2024-20260911-en
General
- Target VirusBuilder.exe
- Size 117KB
- Sample261023-rbwcksb14x
- SHA256 9ee86ab1d6e4d75901eaf4f2ac91c9032dc0782c36af449185ab12f4ed7a0de6
- MD5 4bd416c01b82aacc4baf4374f280823c
- SHA1 e89fc6bd2751b3b096a4ce76f0f862fe1c6313c9
- SHA512 3d00b2c6a3acf4f224ede3249da5fe9311cc7c074d2f0815b24047ec8a9cbefe31a421c7902ee4abda1371257f51c3e3c587ad51781d4ad8b1b95b7ae460413d
- SSDEEP 3072:EDLd/ftMpWbwVmXmP1uHWl6wbXV1u6ZcHsl:I/f2kbkmXc1u2lf1uYcHs
- TLSH T121C3E61036FB4967E47F49B84AF7510243B3A0236578DAD87ECD51A90FE37044AA1FAB
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language VirusBuilder.exe - Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS VirusBuilder.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer VirusBuilder.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion VirusBuilder.exe