Analysis
- max time kernel
148s - max time network
153s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
07/09/2026, 08:22
General
- Target Halkbank.pdf.js
- Size 213KB
- Sample260907-j9tmmsfg63
- SHA256 8dd315436f3c560ac7ec2e56a17a957eb9af512b59ab552e31dba2fd9c0bd066
Malware Config
Extracted
-
xworm
-
5.0
-
31.56.209.234:443
-
6LTYhMtYJSwSKkQV
-
install_file
USB.exe
Signatures
- Family: Xworm
Xworm is a remote access trojan written in C#.
- Detect Xworm Payload 1 IoCs
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- Temporarily bypasses Powershell execution policy 1 TTPs 1 IoCs
Using Set-ExecutionPolicy to permit execution of unsigned or restricted scripts in that process.
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
- Suspicious use of SetThreadContext 1 IoCs
- Command and Scripting Interpreter: JavaScript 1 TTPs
- 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.
- 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.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 6 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\Halkbank.pdf.js1⤵
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C:\Windows\system32\wscript.exewscript.exe1⤵
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\r8w08a3q\tmp_106921_4ba6.cmd1⤵
- Process spawned unexpected child process
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exeC:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe -w h -nop -c "Set-ExecutionPolicy Bypass -Scope Process -Force; & 'C:\Users\Admin\AppData\Local\Temp\r8w08a3q\log_58208_4b65.ps1'"2⤵
- Temporarily bypasses Powershell execution policy
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
log_56083_4b65
log_58208_4b65.ps1
svc_24117_4b65
tmp_106921_4ba6.cmd
memory/1020-36-0x0000000004FF0000-0x000000000508C000-memory.dmp
memory/1020-35-0x0000000000400000-0x000000000040E000-memory.dmp
memory/3176-12-0x0000000005AE0000-0x0000000005B46000-memory.dmp
memory/3176-28-0x0000000007790000-0x0000000007826000-memory.dmp
memory/3176-13-0x0000000005B50000-0x0000000005BB6000-memory.dmp
memory/3176-16-0x0000000005C80000-0x0000000005FDB000-memory.dmp
memory/3176-17-0x00000000061C0000-0x00000000061DE000-memory.dmp
memory/3176-18-0x0000000006230000-0x000000000627C000-memory.dmp
memory/3176-19-0x00000000067A0000-0x00000000067D6000-memory.dmp
memory/3176-20-0x0000000070F80000-0x0000000070FCC000-memory.dmp
memory/3176-23-0x0000000006780000-0x00000000067A0000-memory.dmp
memory/3176-24-0x00000000073C0000-0x0000000007463000-memory.dmp
memory/3176-25-0x0000000007B60000-0x00000000081DC000-memory.dmp
memory/3176-26-0x0000000007520000-0x000000000753A000-memory.dmp
memory/3176-27-0x0000000007590000-0x000000000759A000-memory.dmp
memory/3176-11-0x00000000053E0000-0x0000000005402000-memory.dmp
memory/3176-29-0x0000000007710000-0x0000000007721000-memory.dmp
memory/3176-10-0x0000000074D30000-0x00000000754EC000-memory.dmp
memory/3176-8-0x0000000074D30000-0x00000000754EC000-memory.dmp
memory/3176-9-0x0000000005420000-0x0000000005A6A000-memory.dmp
memory/3176-33-0x0000000007770000-0x000000000778A000-memory.dmp
memory/3176-34-0x0000000006740000-0x0000000006748000-memory.dmp
memory/3176-7-0x0000000004CF0000-0x0000000004D26000-memory.dmp
memory/3176-6-0x0000000074D42000-0x0000000074D43000-memory.dmp
memory/3176-37-0x0000000007890000-0x00000000078B2000-memory.dmp
memory/3176-38-0x00000000087A0000-0x0000000008D5A000-memory.dmp
memory/3176-40-0x0000000074D30000-0x00000000754EC000-memory.dmp