Overview
overview
3Static
static
3Microsoft....4.appx
windows10-2004-x64
Microsoft....4.appx
windows11-21h2-x64
arm64/HEVC...RE.dll
windows10-2004-x64
1arm64/HEVC...RE.dll
windows11-21h2-x64
1arm64/mfH265Enc.dll
windows10-2004-x64
1arm64/mfH265Enc.dll
windows11-21h2-x64
1arm64/msh2...re.dll
windows10-2004-x64
1arm64/msh2...re.dll
windows11-21h2-x64
1x64/HEVCDE...RE.dll
windows10-2004-x64
1x64/mfH265Enc.dll
windows10-2004-x64
1x64/msh265...re.dll
windows10-2004-x64
1x64/msh265...re.dll
windows11-21h2-x64
1x86/HEVCDE...RE.dll
windows10-2004-x64
3x86/mfH265Enc.dll
windows10-2004-x64
3x86/msh265...re.dll
windows10-2004-x64
3x86/msh265...re.dll
windows11-21h2-x64
3Microsoft....4.appx
windows10-2004-x64
Microsoft....4.appx
windows11-21h2-x64
x64/HEVCDE...RE.dll
windows10-2004-x64
1x64/mfH265Enc.dll
windows10-2004-x64
1x64/msh265...re.dll
windows10-2004-x64
1x64/msh265...re.dll
windows11-21h2-x64
1x86/HEVCDE...RE.dll
windows10-2004-x64
3x86/mfH265Enc.dll
windows10-2004-x64
3x86/msh265...re.dll
windows10-2004-x64
3x86/msh265...re.dll
windows11-21h2-x64
3Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
08/06/2026, 13:54
Static task
static1
Behavioral task
behavioral1
Sample
Microsoft.HEVCVideoExtension_8wekyb3d8bbwe.arm64.appx
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
Microsoft.HEVCVideoExtension_8wekyb3d8bbwe.arm64.appx
Resource
win11-20260513-en
Behavioral task
behavioral3
Sample
arm64/HEVCDECODER_STORE.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral4
Sample
arm64/HEVCDECODER_STORE.dll
Resource
win11-20260513-en
Behavioral task
behavioral5
Sample
arm64/mfH265Enc.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral6
Sample
arm64/mfH265Enc.dll
Resource
win11-20260513-en
Behavioral task
behavioral7
Sample
arm64/msh265enchmft_store.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral8
Sample
arm64/msh265enchmft_store.dll
Resource
win11-20260513-en
Behavioral task
behavioral9
Sample
x64/HEVCDECODER_STORE.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral10
Sample
x64/mfH265Enc.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral11
Sample
x64/msh265enchmft_store.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral12
Sample
x64/msh265enchmft_store.dll
Resource
win11-20260513-en
Behavioral task
behavioral13
Sample
x86/HEVCDECODER_STORE.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral14
Sample
x86/mfH265Enc.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral15
Sample
x86/msh265enchmft_store.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral16
Sample
x86/msh265enchmft_store.dll
Resource
win11-20260513-en
Behavioral task
behavioral17
Sample
Microsoft.HEVCVideoExtension_8wekyb3d8bbwe.x64.appx
Resource
win10v2004-20260513-en
Behavioral task
behavioral18
Sample
Microsoft.HEVCVideoExtension_8wekyb3d8bbwe.x64.appx
Resource
win11-20260513-en
Behavioral task
behavioral19
Sample
x64/HEVCDECODER_STORE.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral20
Sample
x64/mfH265Enc.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral21
Sample
x64/msh265enchmft_store.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral22
Sample
x64/msh265enchmft_store.dll
Resource
win11-20260513-en
Behavioral task
behavioral23
Sample
x86/HEVCDECODER_STORE.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral24
Sample
x86/mfH265Enc.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral25
Sample
x86/msh265enchmft_store.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral26
Sample
x86/msh265enchmft_store.dll
Resource
win11-20260513-en
General
- Target x86/mfH265Enc.dll
- Size 970KB
- Sample260608-q7yl5sfs21
- SHA256 daa3a39274b37b0bfea0b3c5857b558d8428c1a2c76f5e209b98c51152e41d7a
- MD5 5c573adf1f29cc78dce4767155996015
- SHA1 28b6fbf648a9b92ba24271487825b648f08d370d
- SHA512 a4465942f9664c9d873202d7c6c650e6b2f8a8b9bc8644bd796646e46435feaff390abd98e363b7822ce674671f87410c9ec7ac2c97768109e107a266206d7d6
- SSDEEP 24576:D11gjb62l2n8i7aEZQ2VzjkeWAYZ5aCbyYKQGxnb2fxbhQ:p1gjRePkeWrm0wn0bhQ
- TLSH T16725BF60F48151B2D9CA24B07BAEF6A7657C17AD0B5085F712C0AAFCE8356C12633F97
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Program crash 1 IoCs
pid pid_target Process procid_target 1664 4268 WerFault.exe 86 - 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 rundll32.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 2264 wrote to memory of 4268 2264 rundll32.exe 86
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\x86\mfH265Enc.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2264 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\x86\mfH265Enc.dll,#12⤵
- System Location Discovery: System Language Discovery
PID:4268 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4268 -s 6003⤵
- Program crash
PID:1664
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4268 -ip 42681⤵PID:3728