Analysis
- max time kernel
149s - max time network
154s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
10/07/2026, 12:10
General
- Target UltraVNC.1.4.3.1_x86.exe
- Size 4.6MB
- Sample260710-pcfbmsa17l
- SHA256 b115f65716e359adbef933300e2efe4776f3e28ff324c481cba0711f8975702c
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 1 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Inno Setup is an open-source installation builder for Windows applications. 2 IoCs
Inno Setup installer
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\UltraVNC.1.4.3.1_x86.exe"C:\Users\Admin\AppData\Local\Temp\UltraVNC.1.4.3.1_x86.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-E46B6.tmp\UltraVNC.1.4.3.1_x86.tmp"C:\Users\Admin\AppData\Local\Temp\is-E46B6.tmp\UltraVNC.1.4.3.1_x86.tmp" /SL5="$80216,3839323,1073152,C:\Users\Admin\AppData\Local\Temp\UltraVNC.1.4.3.1_x86.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
isskin.dll
UltraVNC.1.4.3.1_x86.tmp
memory/532-13-0x0000000000400000-0x0000000000513000-memory.dmp
memory/532-0-0x0000000000400000-0x0000000000513000-memory.dmp
memory/1924-23-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-25-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-14-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-17-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-19-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-21-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-5-0x0000000000E30000-0x0000000000E31000-memory.dmp
memory/1924-15-0x0000000000E30000-0x0000000000E31000-memory.dmp
memory/1924-27-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-29-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-31-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-33-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-35-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-37-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-39-0x0000000000400000-0x000000000074D000-memory.dmp
memory/1924-41-0x0000000000400000-0x000000000074D000-memory.dmp