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mukul975
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Complete skill folder anatomy across all cybersecurity skills: - scripts/agent.py: 80-150 line Python agents using real libraries (impacket, boto3, azure-mgmt-*, kubernetes, pefile, yara, scapy, shodan, stix2, etc.) - references/api-reference.md: real API documentation with method signatures - LICENSE: MIT license for all skill folders
3.1 KiB
3.1 KiB
API Reference: Linux ELF Malware Analysis Tools
readelf - ELF Binary Inspection
Syntax
readelf -h <binary> # ELF header
readelf -S <binary> # Section headers
readelf -l <binary> # Program headers (segments)
readelf -s <binary> # Symbol table
readelf -d <binary> # Dynamic section
readelf -r <binary> # Relocation entries
readelf -n <binary> # Notes section
Key ELF Header Fields
| Field | Description |
|---|---|
Class |
32-bit or 64-bit |
Machine |
Architecture (x86-64, ARM, MIPS) |
Type |
EXEC (executable), DYN (shared object) |
Entry point |
Code execution start address |
pyelftools - Python ELF Parsing
Usage
from elftools.elf.elffile import ELFFile
with open("binary", "rb") as f:
elf = ELFFile(f)
elf.elfclass # 32 or 64
elf.little_endian # True/False
elf.header.e_machine # Architecture
elf.header.e_entry # Entry point
elf.num_sections() # Section count
elf.get_section_by_name(".symtab") # Symbol table
strings - String Extraction
Syntax
strings <binary> # ASCII strings (default min 4)
strings -n 8 <binary> # Minimum 8 characters
strings -e l <binary> # 16-bit little-endian (Unicode)
strings -t x <binary> # Print offset in hex
strace - System Call Tracing
Syntax
strace -f ./binary # Follow forks
strace -e trace=network ./binary # Network calls only
strace -e trace=file ./binary # File operations only
strace -e trace=process ./binary # Process operations
strace -o output.txt ./binary # Log to file
strace -c ./binary # Summary statistics
Key System Calls
| Call | Category |
|---|---|
socket, connect, bind |
Network |
fork, execve, clone |
Process |
open, read, write, unlink |
File I/O |
ptrace |
Anti-debug/injection |
ltrace - Library Call Tracing
Syntax
ltrace -f ./binary # Follow child processes
ltrace -e malloc+free ./binary # Specific functions
ltrace -o output.txt ./binary # Log to file
GDB - GNU Debugger
Syntax
gdb ./binary
(gdb) break main
(gdb) break *0x400580 # Break at address
(gdb) run
(gdb) info registers
(gdb) x/20s $rdi # Examine string at RDI
(gdb) x/10i $rip # Disassemble at RIP
(gdb) bt # Backtrace
UPX - Packer Detection/Unpacking
Syntax
upx -t <binary> # Test if packed
upx -d <binary> # Decompress/unpack
upx -l <binary> # List compression details
objdump - Disassembly
Syntax
objdump -d <binary> # Disassemble .text
objdump -D <binary> # Disassemble all sections
objdump -M intel -d <binary> # Intel syntax
objdump -t <binary> # Symbol table
nm - Symbol Listing
Syntax
nm <binary> # List symbols
nm -D <binary> # Dynamic symbols only
nm -u <binary> # Undefined (imported) symbols