CTF challenges & writeups

65 challenges in family ⊕ rev:vm-bytecode ✕ clear · browse all techniques

Challenge	CTF	Weight	Category	Has
Borrowed_Memory #bytecode-vm-emulation #xorshift-table-regeneration #checksum-guided-debugging #xor-decryption	BDSec 2026	15.62	Reverse	files wu 1
Muktir_Shongket #jit-bytecode-verifier-executor-mismatch #jmp-into-literal #shellcode	BDSec 2026	15.62	Pwn	files wu 1
AlphaCode #custom-dsl-reversing #opcode-fuzzing	BoroCTF 2026	–	Reverse	files wu 1
1+1 #reversing #vm	TRX 2026	–	Reverse	files wu 1
wandering #reversing #vm	TRX 2026	–	Reverse	files wu 1
highly-optimized #vm-reversing #bytecode-interpreter	UofTCTF 2025	23.90	Reverse	files wu 1
bubble #vm-reversing #bytecode	corCTF 2025	82.00	Reverse	files wu 1
whatever_floats_your_boat #vm-reversing #floating-point #mxcsr	corCTF 2025	82.00	Reverse	files wu 1
Obfuscation #vm-obfuscation #bytecode-devirtualization #angr #symbolic-execution	CSAW 2024 Quals	21.80	Reverse	files wu 1
All_Worbled_Up #python-bytecode-reversing #adler32	UofTCTF 2024	23.90	Reverse	files wu 3
Lunar_Unraveling_Adventure #lua-5.1-bytecode-decompilation #unluac	1337UP 2023	24.23	Reverse	files wu 1
Blue_Hens #esoteric-language #vm-reversing	BlueHens 2023	24.61	Reverse	files wu 2
dicer-visor #vm-escape #hypervisor #shellcode-injection #off-by-one #seccomp #orw	DiceCTF 2023	36.70	Pwn	files wu 1
LessEQualmore #vm-reversing	HITCON 2023 Quals	99.75	Reverse	files wu 2
SUBformore #vm-escape	HITCON 2023 Quals	99.75	Pwn	files wu 1
evmvm #evm-bytecode-crafting	LA 2023	–	Pwn	files wu 2
Reduced_Reduced_Instruction_Set_2 #custom-vm #bytecode-reversing #z3	PatriotCTF 2023	24.52	Reverse	files wu 1
Perfect_Blu #dvd-vm #reversing	SECCON 2023 Quals	100.00	Reverse	files wu 1
bypy #cpython-bytecode #oob-read	TSG 2023	–	Pwn	files wu 1
vmwhere1 #reversing #vm	UIUCTF 2023	–	Reverse	files wu 3
vmwhere2 #reversing #vm	UIUCTF 2023	–	Reverse	files wu 3
vmquack_s_vectorized_vices #vm-reversing #avx512	corCTF 2023	36.97	Reverse	files wu 1
fvm #vm-reversing #bytecode #x87-fpu	zer0pts 2023	52.62	Reverse	files wu 1
eunectes-murinus #python-bytecode	HSCTF 2022	–	Reverse	files wu 1
ordersystem #python-bytecode	Hack.lu 2022	93.70	Pwn	files wu 1
vm-v2 #systemverilog-vm-reversing	MapleCTF 2022	24.05	Reverse	files wu 1
MatrixLab1 #java-bytecode #reversing	SekaiCTF 2022	24.86	Reverse	files wu 2
vmquacks_revenge #vm-reversing #anti-tampering	corCTF 2022	24.92	Reverse	files src wu 1
compUDer #vm-reversing	BlueHens 2021	22.62	Reverse	files wu 1
ncore #verilog-softcore-reversing #custom-isa #bytecode-crafting #enclave-dump	CSAW 2021 Quals	20.54	Reverse	files wu 3
LostInYourEyes #vm-reversing #custom-bytecode #ida	DiceCTF 2021	24.82	Reverse	files wu 3
scrambler #python-bytecode	HSCTF 2021	–	Reverse	files wu 2
sneks #python-bytecode	HSCTF 2021	–	Reverse	files wu 3
pycoin #python-bytecode	Hack.lu 2021	94.48	Reverse	files wu 1
game #custom-vm #out-of-bounds (oob)	RCTF 2021	–	Pwn	files wu 1
readme #jsdom-sandbox-escape #vm-escape	corCTF 2021	24.92	Web	files wu 1
ret2cds #seccomp-bypass #process-vm-writev #shellcode-injection	corCTF 2021	24.92	Pwn	files wu 2
vmquack #vm-reversing #custom-architecture	corCTF 2021	24.92	Reverse	files wu 1
indie_vmm #vm-escape	hxp 2021	99.41	Reverse	files wu 1
m0lang #interpreter-overflow	m0leCon 2021 Quals	24.55	Reverse	files wu 1

Challenges