Analysis
- user interaction
yes - max time kernel
149s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20260911-en - resource tags
- submitted
17/09/2026, 17:20
General
- Target Umbral.builder.exe
- Size 32KB
- Sample260917-vwtaha11ft
- SHA256 93fa1cda0ff2a77107aab055cfd72aa1719154cfd031f1a6f2462b3a12cac422
Score
10/10
Malware Config
Extracted
Family
-
xworm
C2
-
tissues-carers.tun.ply.gg:30292
Mutex
-
7CQ94l05fFeEOXUO
Attributes
-
Install_directory
%ProgramData%
-
install_file
USB.exe
aes.plain
Signatures
- Family: Xworm
Xworm is a remote access trojan written in C#.
- Detect Xworm Payload 2 IoCs
- Creates a file in the Startup directory 1 TTPs 2 IoCs
A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.
- Executes dropped EXE 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Umbral.builder.exe"C:\Users\Admin\AppData\Local\Temp\Umbral.builder.exe"1⤵
- Creates a file in the Startup directory
- Suspicious use of AdjustPrivilegeToken
-
C:\PROGRA~3\Umbral.builder.exeC:\PROGRA~3\UMBRAL~1.EXE1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
Umbral.builder.exe
memory/3928-0-0x00000000001A0000-0x00000000001AE000-memory.dmp
memory/3928-5-0x0000000002360000-0x0000000002370000-memory.dmp
memory/3928-9-0x0000000002360000-0x0000000002370000-memory.dmp