Overview
overview
7Static
static
3blockyfish...64.exe
windows10-2004-x64
7blockyfish...64.exe
windows11-21h2-x64
7$PLUGINSDI...in.dll
windows10-2004-x64
3$PLUGINSDI...in.dll
windows11-21h2-x64
3$PLUGINSDI...ls.dll
windows10-2004-x64
3$PLUGINSDI...ls.dll
windows11-21h2-x64
3$PLUGINSDI...em.dll
windows10-2004-x64
3$PLUGINSDI...em.dll
windows11-21h2-x64
3$PLUGINSDIR/UAC.dll
windows10-2004-x64
3$PLUGINSDIR/UAC.dll
windows11-21h2-x64
3$PLUGINSDI...ll.dll
windows10-2004-x64
3$PLUGINSDI...ll.dll
windows11-21h2-x64
3$PLUGINSDIR/app-64.7z
windows10-2004-x64
1$PLUGINSDIR/app-64.7z
windows11-21h2-x64
1Blockyfish.exe
windows10-2004-x64
7d3dcompiler_47.dll
windows10-2004-x64
1dxcompiler.dll
windows10-2004-x64
1dxil.dll
windows10-2004-x64
1ffmpeg.dll
windows10-2004-x64
1libEGL.dll
windows10-2004-x64
1libGLESv2.dll
windows10-2004-x64
1vk_swiftshader.dll
windows10-2004-x64
1vulkan-1.dll
windows10-2004-x64
1$PLUGINSDI...gs.dll
windows10-2004-x64
3$PLUGINSDI...gs.dll
windows11-21h2-x64
3$PLUGINSDI...ec.dll
windows10-2004-x64
3$PLUGINSDI...ec.dll
windows11-21h2-x64
3$PLUGINSDI...7z.dll
windows10-2004-x64
3$PLUGINSDI...7z.dll
windows11-21h2-x64
3$R0/Uninst...sh.exe
windows10-2004-x64
7$R0/Uninst...sh.exe
windows11-21h2-x64
7$PLUGINSDI...ls.dll
windows10-2004-x64
3Analysis
- max time kernel
149s - max time network
156s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
03/05/2026, 19:25
Static task
static1
Behavioral task
behavioral1
Sample
blockyfish-4.4.1-windows-x64.exe
Resource
win10v2004-20260130-en
Behavioral task
behavioral2
Sample
blockyfish-4.4.1-windows-x64.exe
Resource
win11-20260130-en
Behavioral task
behavioral3
Sample
$PLUGINSDIR/NSIS_SkinCrafter_Plugin.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral4
Sample
$PLUGINSDIR/NSIS_SkinCrafter_Plugin.dll
Resource
win11-20260130-en
Behavioral task
behavioral5
Sample
$PLUGINSDIR/StdUtils.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral6
Sample
$PLUGINSDIR/StdUtils.dll
Resource
win11-20260130-en
Behavioral task
behavioral7
Sample
$PLUGINSDIR/System.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral8
Sample
$PLUGINSDIR/System.dll
Resource
win11-20260130-en
Behavioral task
behavioral9
Sample
$PLUGINSDIR/UAC.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral10
Sample
$PLUGINSDIR/UAC.dll
Resource
win11-20260130-en
Behavioral task
behavioral11
Sample
$PLUGINSDIR/WinShell.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral12
Sample
$PLUGINSDIR/WinShell.dll
Resource
win11-20260130-en
Behavioral task
behavioral13
Sample
$PLUGINSDIR/app-64.7z
Resource
win10v2004-20260130-en
Behavioral task
behavioral14
Sample
$PLUGINSDIR/app-64.7z
Resource
win11-20260130-en
Behavioral task
behavioral15
Sample
Blockyfish.exe
Resource
win10v2004-20260130-en
Behavioral task
behavioral16
Sample
d3dcompiler_47.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral17
Sample
dxcompiler.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral18
Sample
dxil.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral19
Sample
ffmpeg.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral20
Sample
libEGL.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral21
Sample
libGLESv2.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral22
Sample
vk_swiftshader.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral23
Sample
vulkan-1.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral24
Sample
$PLUGINSDIR/nsDialogs.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral25
Sample
$PLUGINSDIR/nsDialogs.dll
Resource
win11-20260130-en
Behavioral task
behavioral26
Sample
$PLUGINSDIR/nsExec.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral27
Sample
$PLUGINSDIR/nsExec.dll
Resource
win11-20260130-en
Behavioral task
behavioral28
Sample
$PLUGINSDIR/nsis7z.dll
Resource
win10v2004-20260130-en
Behavioral task
behavioral29
Sample
$PLUGINSDIR/nsis7z.dll
Resource
win11-20260130-en
Behavioral task
behavioral30
Sample
$R0/Uninstall Blockyfish.exe
Resource
win10v2004-20260130-en
Behavioral task
behavioral31
Sample
$R0/Uninstall Blockyfish.exe
Resource
win11-20260130-en
Behavioral task
behavioral32
Sample
$PLUGINSDIR/StdUtils.dll
Resource
win10v2004-20260130-en
General
- Target $PLUGINSDIR/NSIS_SkinCrafter_Plugin.dll
- Size 5.8MB
- Sample260503-x451daf141
- SHA256 ea1552de423ed1768bace344d9a07bf529845c75fe6fc6ce3c4ba91d4aae5409
- MD5 2e13e03b7cf2d8c8338bbc3d29fd3e07
- SHA1 173e6e67c5315474765dcd303b3214d5600c48ea
- SHA512 94220a07aea2f4a45ef6b7566baba5a9ce73e70236bf97fc2489bee50b662f3fd05824d7804dd544eef85d73e69091aaae5de3094f0866bf51521024eb3d168d
- SSDEEP 98304:eF0Kg9frmFcqlMZ4vpHfOVlQnzW4Aogn/oXFdAaTZ8GcB7d0:eFFA7t2RHfYlQZJgTamGcBi
- TLSH T120569E01B2D5D8F6C26322706E2DB726A3FDAE3447345A837BC47E1D5A31982563B31B
- 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 rundll32.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 2472 wrote to memory of 4156 2472 rundll32.exe 80
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\NSIS_SkinCrafter_Plugin.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2472 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\NSIS_SkinCrafter_Plugin.dll,#12⤵
- System Location Discovery: System Language Discovery
PID:4156
-