Konstantin Tarasenko

About

Self-taught, focused on vulnerability research and malware analysis. Background in x86-64 and ARM assembly, bootloader internals, and web security. Tools: IDA Pro, Ghidra, NASM, QEMU.

Crackmes

• CrackMe 01 — MASM password check
  Hand-written MASM dialog app. Three strings look identical in the listing; only the API that consumes each one shows which is the password.
  Windows · x86 · 32-bit · PE32 · very easy
• CrackMe 02 - I need to be honest
  Two-stage password check, plus constants the code never touches.
  Linux · x86 · 64-bit · ELF64 · very easy
• CrackMe 03 - First iOS experience
  Five chained checks guarding a 17-character key: length, structure, a checksum over even positions only, a positional XOR table and a rolling hash.
  iOS · AArch64 · 64-bit · Mach-O · medium
• CrackMe 04 - Sigil forging ritual
  Linux ELF64, C. Keygen for a triple hash, and a format string with a missing argument.
  Linux · x86-64 · 64-bit · ELF64, PIE · medium

Malware analysis

• Ransomware.YggGuru - Go ransomware targeting Documents
  A Go-based ransomware sample packed with UPX that targets the Documents directory, encrypts files with AES-256-GCM, and exfiltrates the key over HTTP.
  Windows · x86-64 · PE32+ · Ransomware · UPX

Contact

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