Overview
overview
5Static
static
5FSViewerSetup81.exe
windows10-2004-x64
4FSViewerSetup81.exe
windows11-ltsc_2024-x64
4$PLUGINSDI...ns.dll
windows10-2004-x64
3$PLUGINSDI...ns.dll
windows11-ltsc_2024-x64
3$PLUGINSDI...em.dll
windows10-2004-x64
3$PLUGINSDI...em.dll
windows11-ltsc_2024-x64
3EmailZipEXE.exe
windows10-2004-x64
3EmailZipEXE.exe
windows11-ltsc_2024-x64
3FSIcons.dll
windows10-2004-x64
3FSIcons.dll
windows11-ltsc_2024-x64
3FSViewer.exe
windows10-2004-x64
3FSViewer.exe
windows11-ltsc_2024-x64
3FSViewerHelp.chm
windows10-2004-x64
1FSViewerHelp.chm
windows11-ltsc_2024-x64
1Languages/...10.chm
windows10-2004-x64
1Languages/...10.chm
windows11-ltsc_2024-x64
1Languages/...11.chm
windows10-2004-x64
1Languages/...11.chm
windows11-ltsc_2024-x64
1Languages/...13.chm
windows10-2004-x64
1Languages/...13.chm
windows11-ltsc_2024-x64
1Languages/...15.chm
windows10-2004-x64
1Languages/...15.chm
windows11-ltsc_2024-x64
1Languages/...17.chm
windows10-2004-x64
1Languages/...17.chm
windows11-ltsc_2024-x64
1Languages/...18.chm
windows10-2004-x64
1Languages/...18.chm
windows11-ltsc_2024-x64
1Languages/...21.chm
windows10-2004-x64
1Languages/...21.chm
windows11-ltsc_2024-x64
1Languages/..._4.chm
windows10-2004-x64
1Languages/..._4.chm
windows11-ltsc_2024-x64
1Languages/..._5.chm
windows10-2004-x64
1Languages/..._5.chm
windows11-ltsc_2024-x64
1Analysis
- max time kernel
149s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
15/08/2026, 00:23
Behavioral task
behavioral1
Sample
FSViewerSetup81.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
FSViewerSetup81.exe
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral3
Sample
$PLUGINSDIR/InstallOptions.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral4
Sample
$PLUGINSDIR/InstallOptions.dll
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral5
Sample
$PLUGINSDIR/System.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral6
Sample
$PLUGINSDIR/System.dll
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral7
Sample
EmailZipEXE.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral8
Sample
EmailZipEXE.exe
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral9
Sample
FSIcons.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral10
Sample
FSIcons.dll
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral11
Sample
FSViewer.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral12
Sample
FSViewer.exe
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral13
Sample
FSViewerHelp.chm
Resource
win10v2004-20260513-en
Behavioral task
behavioral14
Sample
FSViewerHelp.chm
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral15
Sample
Languages/FSViewerHelp_10.chm
Resource
win10v2004-20260513-en
Behavioral task
behavioral16
Sample
Languages/FSViewerHelp_10.chm
Resource
win11ltsc2024-20260710-en
Behavioral task
behavioral17
Sample
Languages/FSViewerHelp_11.chm
Resource
win10v2004-20260513-en
Behavioral task
behavioral18
Sample
Languages/FSViewerHelp_11.chm
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral19
Sample
Languages/FSViewerHelp_13.chm
Resource
win10v2004-20260513-en
Behavioral task
behavioral20
Sample
Languages/FSViewerHelp_13.chm
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral21
Sample
Languages/FSViewerHelp_15.chm
Resource
win10v2004-20260513-en
Behavioral task
behavioral22
Sample
Languages/FSViewerHelp_15.chm
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral23
Sample
Languages/FSViewerHelp_17.chm
Resource
win10v2004-20260513-en
Behavioral task
behavioral24
Sample
Languages/FSViewerHelp_17.chm
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral25
Sample
Languages/FSViewerHelp_18.chm
Resource
win10v2004-20260513-en
Behavioral task
behavioral26
Sample
Languages/FSViewerHelp_18.chm
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral27
Sample
Languages/FSViewerHelp_21.chm
Resource
win10v2004-20260513-en
Behavioral task
behavioral28
Sample
Languages/FSViewerHelp_21.chm
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral29
Sample
Languages/FSViewerHelp_4.chm
Resource
win10v2004-20260513-en
Behavioral task
behavioral30
Sample
Languages/FSViewerHelp_4.chm
Resource
win11ltsc2024-20260710-en
Behavioral task
behavioral31
Sample
Languages/FSViewerHelp_5.chm
Resource
win10v2004-20260513-en
Behavioral task
behavioral32
Sample
Languages/FSViewerHelp_5.chm
Resource
win11ltsc2024-20260709-en
General
- Target $PLUGINSDIR/System.dll
- Size 12KB
- Sample260815-aprg4swtbx
- SHA256 8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
- MD5 cff85c549d536f651d4fb8387f1976f2
- SHA1 d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e
- SHA512 531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88
- SSDEEP 192:Zjvco0qWTlt70m5Aj/lQ0sEWD/wtYbBHFNaDybC7y+XBz0QPi:FHQlt70mij/lQRv/9VMjzr
- TLSH T126426B129BB089F2F591583814667F2A6FBE9C5D27F50563CFE304D63D212CB983A283
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Program crash 1 IoCs
pid pid_target Process procid_target 3816 4232 WerFault.exe 85 - 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 3132 wrote to memory of 4232 3132 rundll32.exe 85
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:3132 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#12⤵
- System Location Discovery: System Language Discovery
PID:4232 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4232 -s 6163⤵
- Program crash
PID:3816
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4232 -ip 42321⤵PID:4704