Analysis
- max time kernel
149s - max time network
141s - platform
windows10-2004_x64 - resource
win10v2004-20251231-en - resource tags
- submitted
08/01/2026, 08:31
General
- Target ARRIVAL-NOTICE-pdf.exe
- Size 572KB
- Sample260108-keytjses4e
- SHA256 a2872a57bbad4ddbd5a46e2bd32d502b0f8e0682d89869b72613d5bd5f74b580
Malware Config
Signatures
- Formbook
Formbook is a data stealing malware which is capable of stealing data.
- Formbook family
- Formbook payload 3 IoCs
- Loads dropped DLL 2 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Drops file in Program Files directory 1 IoCs
- Drops file in Windows directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 14 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\ARRIVAL-NOTICE-pdf.exe"C:\Users\Admin\AppData\Local\Temp\ARRIVAL-NOTICE-pdf.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\ARRIVAL-NOTICE-pdf.exe"C:\Users\Admin\AppData\Local\Temp\ARRIVAL-NOTICE-pdf.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\ARRIVAL-NOTICE-pdf.exe"C:\Users\Admin\AppData\Local\Temp\ARRIVAL-NOTICE-pdf.exe"2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\ARRIVAL-NOTICE-pdf.exe"C:\Users\Admin\AppData\Local\Temp\ARRIVAL-NOTICE-pdf.exe"3⤵
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
nscBE23.tmp
nsdC047.tmp
nsdC047.tmp
nsdC047.tmp
nsdC047.tmp
nsdC047.tmp
nsdC047.tmp
nsfBA96.tmp
nsfBA96.tmp
nstC2C8.tmp
System.dll
memory/540-575-0x0000000000400000-0x0000000001654000-memory.dmp
memory/540-590-0x0000000000401000-0x0000000000404000-memory.dmp
memory/540-576-0x0000000077728000-0x0000000077729000-memory.dmp
memory/540-578-0x0000000077745000-0x0000000077746000-memory.dmp
memory/540-577-0x00000000777C9000-0x00000000777CA000-memory.dmp
memory/540-589-0x00000000776A1000-0x00000000777C1000-memory.dmp
memory/540-588-0x0000000000400000-0x0000000001654000-memory.dmp
memory/540-598-0x0000000000400000-0x0000000001654000-memory.dmp
memory/540-591-0x0000000000400000-0x0000000001654000-memory.dmp
memory/540-592-0x0000000000400000-0x0000000001654000-memory.dmp
memory/540-593-0x0000000000400000-0x0000000001654000-memory.dmp
memory/540-594-0x00000000777C9000-0x00000000777CA000-memory.dmp
memory/540-595-0x0000000000401000-0x0000000000404000-memory.dmp
memory/4596-574-0x0000000074385000-0x0000000074386000-memory.dmp