Analysis
- max time kernel
898s - max time network
446s - platform
windows11-21h2_x64 - resource
win11-20260911-en - resource tags
arch:x64arch:x86image:win11-20260911-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
30/10/2026, 22:36
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
packages.zip
Resource
win11-20260911-en
11 signatures
900 seconds
Behavioral task
behavioral2
Sample
HealthCheckService.lnk
Resource
win11-20260911-en
4 signatures
900 seconds
Behavioral task
behavioral3
Sample
MSBuild.exe
Resource
win11-20260911-en
1 signatures
900 seconds
General
- Target HealthCheckService.lnk
- Size 1KB
- Sample261030-2jpvwaff77
- SHA256 4002b7190215f22001bd3cbaf99d77c2acb45d7cbadc05a86c06feec79e5f286
- MD5 8e92da2dd9dec1a35b68cd28ccaa9e04
- SHA1 904ed27fa486695a71755bf20750490c870295ea
- SHA512 58f97158a3a2230dc356006cc63e2ca719c45737fef67934736a9af434a102312a043380509628b65303247eaf4973c2c137967250d13c4613916f7b9c064e0d
- TLSH T18C31460C598E1B21C372C933A8AF9312D9763851FA921F9A408482C82554600BC62D1F
- MD5 SHA1 SHA512 TLSH
Malware Config
Signatures
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 2 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
pid Process 4948 cmd.exe 4816 cmd.exe - 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 MSBuild.exe - Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4948 wrote to memory of 4816 4948 cmd.exe 83 PID 4816 wrote to memory of 3340 4816 cmd.exe 84 PID 4816 wrote to memory of 4908 4816 cmd.exe 85
Processes
-
C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\HealthCheckService.lnk1⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:4948 -
C:\WINDOWS\system32\cmd.exe"C:\WINDOWS\system32\cmd.exe" /c "build.cmd"2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:4816 -
C:\Windows\system32\chcp.comchcp 650013⤵PID:3340
-
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C:\Users\Admin\AppData\Local\Temp\MSBuild.exe"C:\Users\Admin\AppData\Local\Temp\MSBuild.exe" "C:\Users\Admin\AppData\Local\Temp\HealthCheckService.csproj" /nologo /v:q /nodereuse:false /noconlog3⤵
- System Location Discovery: System Language Discovery
PID:4908
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