Analysis
- max time kernel
149s - max time network
132s - platform
windows11-21h2_x64 - resource
win11-20251015-en - resource tags
arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system - submitted
24/11/2025, 16:00
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe
Resource
win10v2004-20251016-en
windows10-2004-x64
10 signatures
150 seconds
Behavioral task
behavioral2
Sample
a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe
Resource
win11-20251015-en
windows11-21h2-x64
10 signatures
150 seconds
General
- Target a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe
- Size 8.3MB
- Sample251124-tf3csshk21
- SHA256 a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0
- MD5 920f408fdc80c5697739cda9cf9a4ca7
- SHA1 8c3e1d05b4b0fda12029f7c71e283cdca83e2b79
- SHA512 4349bc633e59c9c77cba0fc9f95c6feeeb1e89c3266cd0fe981e795895d059c592bad6a5ddbe20efc5929efbb4bc9901237aa4124e663f9eed2742a911fe5676
- SSDEEP 98304:or3s4Nso2D9lJ61MnhTxn8MiUDRriBuTGNB3UlXzPxA6D5FLOAkGkzdnEVomFHKy:o4cso2D9BB2EzPxAsFLOyomFHKnPV4
- MD5 SHA1 SHA512 SSDEEP
Score
7/10
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 964 BMSGTray.exe - Loads dropped DLL 1 IoCs
pid Process 5168 regsvr32.exe - Drops file in System32 directory 29 IoCs
description ioc Process File created C:\Windows\SysWOW64\bmsbin\defaultUI\TempPolicyHelp.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\TakeoutPolicyRequestComplete.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\FilePreCheckHelp.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\detailpolicy.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\CustomizeShowInfoWebView.json BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\OTPHelp.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\TempPolicyDenyComplete.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\TakeoutPolicyAllowComplete.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\bms-common-post.css BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\CustomizeMenu.json BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\showpolicy.js BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\detailpolicy.js BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\EXDSDenyComplete.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\bms-common.css BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\CustomizePopup.json BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\TempPolicyAllowComplete.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\TakeoutOTPHelp.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\jquery.dataTables.bms.css BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\EXDSAllowComplete.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\showpolicy.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\bootstrap.min.css BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\language.js BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\TempPolicyRequestComplete.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\TakeoutPolicyDenyComplete.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\EXDSRequestComplete.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\EXDSHelp.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\Lang.json BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\TakeoutPolicyHelp.html BMSGTray.exe File created C:\Windows\SysWOW64\bmsbin\defaultUI\CustomizeShowInfo.json BMSGTray.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 BMSGTray.exe - Delays execution with timeout.exe 1 IoCs
pid Process 2640 timeout.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION BMSGTray.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\BMSGTray.exe = "11000" BMSGTray.exe - Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 964 BMSGTray.exe 964 BMSGTray.exe - Suspicious behavior: RenamesItself 1 IoCs
pid Process 2760 a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe - Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 964 BMSGTray.exe 964 BMSGTray.exe - Suspicious use of WriteProcessMemory 13 IoCs
description pid Process procid_target PID 2760 wrote to memory of 5476 2760 a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe 78 PID 2760 wrote to memory of 5476 2760 a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe 78 PID 5476 wrote to memory of 964 5476 cmd.exe 80 PID 5476 wrote to memory of 964 5476 cmd.exe 80 PID 5476 wrote to memory of 964 5476 cmd.exe 80 PID 2760 wrote to memory of 5168 2760 a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe 81 PID 2760 wrote to memory of 5168 2760 a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe 81 PID 2760 wrote to memory of 3980 2760 a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe 82 PID 2760 wrote to memory of 3980 2760 a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe 82 PID 3980 wrote to memory of 2640 3980 cmd.exe 84 PID 3980 wrote to memory of 2640 3980 cmd.exe 84 PID 5168 wrote to memory of 3444 5168 regsvr32.exe 85 PID 5168 wrote to memory of 3444 5168 regsvr32.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe"C:\Users\Admin\AppData\Local\Temp\a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe"1⤵
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:2760 -
C:\Windows\SYSTEM32\cmd.execmd.exe /c start "" "BMSGTray.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:5476 -
C:\Users\Admin\AppData\Local\Temp\BMSGTray.exe"BMSGTray.exe"3⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:964
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C:\Windows\SYSTEM32\regsvr32.exeregsvr32.exe /s "C:\Users\Admin\AppData\Roaming\IconCache.mdf"2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:5168 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\msbuild.bat" "3⤵PID:3444
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C:\Windows\SYSTEM32\cmd.execmd.exe /c timeout /t 3 & del /q "C:\Users\Admin\AppData\Local\Temp\a4a8dc0f13ddacfad3e0ef8929aac9453759f5e77d9222412ca637bec32320d0.exe~"2⤵
- Suspicious use of WriteProcessMemory
PID:3980 -
C:\Windows\system32\timeout.exetimeout /t 33⤵
- Delays execution with timeout.exe
PID:2640
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\BMSGTray.exe
- Size 6.9MB
- SHA256 2082fa21544b1157a924982d47f7dd88e14fc0333ed63ba2636f9c11e94f30c6
- MD5 3775b1ec70a428a9c2d4b2fe46b0ad35
- SHA1 b3613ced5e181d9396853fc57f01af2a29491fc3
- SHA512 f4e0d73d89ecb44f6a94dfeeffa6ece88af4fd49ea54ad4fff3d90c3fdb8c138dddaa68ff8943fc8f17957313acc51c54255da2aaf8a9eacc58bb94f0e99f008
- SSDEEP 98304:ANso2D9lJ61MnhTxn8MiUDRriBuTGNB3UlXzPxA6D5FLOAkGkzdnEVomFHKnPrJq:Eso2D9BB2EzPxAsFLOyomFHKnPV4H
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\msbuild.bat
- Size 181B
- SHA256 e079cb60ec77a21808041fd06f192e8b1d626c59223ec2de695db3577ea2fb63
- MD5 884dd593b822fbccb531630aec0437eb
- SHA1 ab27e2941e1dc77517583b97cfc9bfb15a6d475e
- SHA512 d55bff0fb0591e60043fca127254a1d45185d6e9d1ad50806f518b1882f19a842a01956ef22a324b16a118b7656f7bf9c88d908a83fffc31770ce943db23c15c
- MD5 SHA1 SHA512