Analysis
- max time kernel
10s - max time network
143s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
14/10/2026, 02:30
General
- Target Procurement 4902016.js
- Size 1.7MB
- Sample261014-czcstaew31
- SHA256 0d10e8c243c9d13a8deee26c21d7b4fdd824bc6c6d83a465dab25c58ec0a906f
Malware Config
Signatures
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 1 IoCs
- Command and Scripting Interpreter: JavaScript 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 1 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of WriteProcessMemory 3 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Windows\system32\wscript.exewscript.exe "C:\Users\Admin\AppData\Local\Temp\Procurement 4902016.js"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /sc minute /mo 15 /tn "WindowsSecurityUpdate" /tr "wscript.exe "C:\ProgramData\WindowsSecurityUpdate\WindowsSecurityUpdate.js"" /f2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /sc minute /mo 15 /tn "WindowsSecurityUpdate" /tr "wscript.exe "C:\ProgramData\WindowsSecurityUpdate\WindowsSecurityUpdate.js"" /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
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C:\ProgramData\App_n486uem8\thunder\thunder.exe"C:\ProgramData\App_n486uem8\thunder\thunder.exe" -run "C:\ProgramData\App_n486uem8\thunder\include\char.c"2⤵
- Executes dropped EXE
- Loads dropped DLL
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C:\Windows\system32\wscript.exewscript.exe1⤵
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
app.zip
char.c
libtcc.dll
thunder.exe
libtcc.ini
_mingw.h
ctype.h
excpt.h
stdio_s.h
string_s.h
stdarg.h
stddef.h
stdio.h
string.h
vadefs.h
basetsd.h
guiddef.h
poppack.h
pshpack1.h
pshpack2.h
pshpack4.h
pshpack8.h
winbase.h
wincon.h
windef.h
windows.h
winerror.h
wingdi.h
winnt.h
winreg.h
winuser.h
winver.h
kernel32.def
libtcc1-64.a
msvcrt.def
user32.def
memory/3612-1618-0x0000000000610000-0x0000000000667000-memory.dmp
memory/3612-1617-0x0000000000610000-0x0000000000667000-memory.dmp
memory/3612-1616-0x0000000000610000-0x0000000000667000-memory.dmp
memory/3612-1615-0x0000000000610000-0x0000000000667000-memory.dmp
memory/3612-14843-0x0000000000400000-0x000000000040B000-memory.dmp
memory/3612-14844-0x0000000062180000-0x00000000621D2000-memory.dmp