host-interaction/file-system/write
rule:
meta:
name: write file on Windows
namespace: host-interaction/file-system/write
authors:
- william.ballenthin@mandiant.com
- anushka.virgaonkar@mandiant.com
scopes:
static: function
dynamic: thread
mbc:
- File System::Writes File [C0052]
examples:
- Practical Malware Analysis Lab 01-04.exe_:0x4011FC
# ntdll
- 563653399B82CD443F120ECEFF836EA3678D4CF11D9B351BB737573C2D856299:0x1400025C4
features:
- or:
- and:
- os: windows
- optional:
- basic block:
- or:
- number: 0x40000000 = GENERIC_WRITE
- number: 0x2 = FILE_WRITE_DATA
- match: create or open file
- call:
- or:
- number: 0x40000000 = GENERIC_WRITE
- number: 0x2 = FILE_WRITE_DATA
- match: create or open file
- or:
- api: kernel32.WriteFile
- api: kernel32.WriteFileEx
- api: NtWriteFile
- api: ZwWriteFile
- api: _fwrite
- api: fwrite
- api: System.IO.File::WriteAllBytes
- api: System.IO.File::WriteAllBytesAsync
- api: System.IO.File::WriteAllLines
- api: System.IO.File::WriteAllLinesAsync
- api: System.IO.File::WriteAllText
- api: System.IO.File::WriteAllTextAsync
- api: System.IO.File::AppendAllLines
- api: System.IO.File::AppendAllLinesAsync
- api: System.IO.File::AppendAllText
- api: System.IO.File::AppendAllTextAsync
- api: System.IO.File::AppendText
- api: System.IO.FileInfo::AppendText
last edited: 2023-11-24 10:35:03