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vmprofiler
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added ADD profiler, added some macros to make matchers easier...

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John Doe 3 years ago
parent 599a685b9e
commit dcb8e1c96a
8 changed files with 144 additions and 77 deletions
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1
CMakeLists.txt
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@ -53,6 +53,7 @@ list(APPEND vmprofiler_SOURCES
"src/vmctx.cpp"
"src/vminstrs.cpp"
"src/vmlocate.cpp"
"src/vmprofiles/add.cpp"
"src/vmprofiles/jmp.cpp"
"src/vmprofiles/lconst.cpp"
"src/vmprofiles/lreg.cpp"

45
include/vminstrs.hpp
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@ -140,11 +140,12 @@ extern profiler_t jmp;
extern profiler_t sreg;
extern profiler_t lreg;
extern profiler_t lconst;
extern profiler_t add;
/// <summary>
/// unsorted vector of profiles... they get sorted once at runtime...
/// </summary>
inline std::vector<profiler_t*> profiles = {&jmp, &sreg, &lreg, &lconst};
inline std::vector<profiler_t*> profiles = {&add, &jmp, &sreg, &lreg, &lconst};
/// <summary>
/// no i did not make this by hand, you cannot clown upon me!
@ -249,4 +250,44 @@ vinstr_t determine(zydis_reg_t& vip, zydis_reg_t& vsp, hndlr_trace_t& hndlr);
/// <param name="mnemonic">mnemonic of the profile to get...</param>
/// <returns>pointer to the profile...</returns>
profiler_t* get_profile(mnemonic_t mnemonic);
} // namespace vm::instrs
} // namespace vm::instrs
// MOV REG, [VIP]
#define IMM_FETCH \
[&](const zydis_reg_t vip, const zydis_reg_t vsp, \
const zydis_decoded_instr_t& instr) -> bool { \
return vm::utils::is_mov(instr) && \
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER && \
instr.operands[1].type == ZYDIS_OPERAND_TYPE_MEMORY && \
instr.operands[1].mem.base == vip; \
}
// MOV [VSP], REG
#define STR_VALUE \
[&](const zydis_reg_t vip, const zydis_reg_t vsp, \
const zydis_decoded_instr_t& instr) -> bool { \
return instr.mnemonic == ZYDIS_MNEMONIC_MOV && \
instr.operands[0].type == ZYDIS_OPERAND_TYPE_MEMORY && \
instr.operands[0].mem.base == vsp && \
instr.operands[1].type == ZYDIS_OPERAND_TYPE_REGISTER; \
}
// MOV REG, [VSP]
#define LOAD_VALUE \
[&](const zydis_reg_t vip, const zydis_reg_t vsp, \
const zydis_decoded_instr_t& instr) -> bool { \
return instr.mnemonic == ZYDIS_MNEMONIC_MOV && \
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER && \
instr.operands[1].type == ZYDIS_OPERAND_TYPE_MEMORY && \
instr.operands[1].mem.base == vsp; \
}
// SUB VSP, OFFSET
#define SUB_VSP \
[&](const zydis_reg_t vip, const zydis_reg_t vsp, \
const zydis_decoded_instr_t& instr) -> bool { \
return instr.mnemonic == ZYDIS_MNEMONIC_SUB && \
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER && \
instr.operands[0].reg.value == vsp && \
instr.operands[1].type == ZYDIS_OPERAND_TYPE_IMMEDIATE; \
}

8
src/vmlocate.cpp
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@ -145,6 +145,14 @@ std::vector<vm_enter_t> get_vm_entries(std::uintptr_t module_base,
}))
continue;
// check for invalid instructions... such as INT instructions...
if (vm::locate::find(rtn, [&](const zydis_instr_t& instr) -> bool {
const auto& i = instr.instr;
return i.mnemonic >= ZYDIS_MNEMONIC_INT &&
i.mnemonic <= ZYDIS_MNEMONIC_INT3;
}))
continue;
// if code execution gets to here then we can assume this is a legit vm
// entry... its time to build a vm_enter_t... first we check to see if an
// existing entry already exits...

83
src/vmprofiles/add.cpp
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@ -0,0 +1,83 @@
#include <vminstrs.hpp>
namespace vm::instrs {
profiler_t add = {
"ADD",
mnemonic_t::add,
{{// MOV REG, [VSP]
LOAD_VALUE,
// MOV REG, [VSP+OFFSET]
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_MOV &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_MEMORY &&
instr.operands[1].mem.base == vsp &&
instr.operands[1].mem.disp.has_displacement;
},
// ADD REG, REG
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_ADD &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_REGISTER;
},
// MOV [VSP+OFFSET], REG
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_MOV &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_MEMORY &&
instr.operands[0].mem.base == vsp &&
instr.operands[0].mem.disp.has_displacement &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_REGISTER;
},
// PUSHFQ
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_PUSHFQ;
},
// POP [VSP]
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_POP &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_MEMORY &&
instr.operands[0].mem.base == vsp;
}}},
[&](zydis_reg_t& vip,
zydis_reg_t& vsp,
hndlr_trace_t& hndlr) -> std::optional<vinstr_t> {
vinstr_t res{mnemonic_t::add};
// MOV REG, [VSP]
const auto mov_reg_vsp = std::find_if(
hndlr.m_instrs.begin(), hndlr.m_instrs.end(),
[&](emu_instr_t& instr) -> bool {
const auto& i = instr.m_instr;
return i.mnemonic == ZYDIS_MNEMONIC_MOV &&
i.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
i.operands[1].type == ZYDIS_OPERAND_TYPE_MEMORY &&
i.operands[1].mem.base == vsp;
});
// MOV [VSP+OFFSET], REG
const auto mov_vsp_offset = std::find_if(
hndlr.m_instrs.begin(), hndlr.m_instrs.end(),
[&](emu_instr_t& instr) -> bool {
const auto& i = instr.m_instr;
return i.mnemonic == ZYDIS_MNEMONIC_MOV &&
i.operands[0].type == ZYDIS_OPERAND_TYPE_MEMORY &&
i.operands[0].mem.base == vsp &&
i.operands[0].mem.disp.has_displacement &&
i.operands[1].type == ZYDIS_OPERAND_TYPE_REGISTER;
});
res.stack_size = mov_vsp_offset->m_instr.operands[1].size;
res.imm.size = mov_reg_vsp->m_instr.operands[1].size;
return res;
}};
}

12
src/vmprofiles/jmp.cpp
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@ -5,14 +5,7 @@ profiler_t jmp = {
"JMP",
mnemonic_t::jmp,
{{// MOV REG, [VSP]
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_MOV &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_MEMORY &&
instr.operands[1].mem.base == vsp;
},
LOAD_VALUE,
// ADD VSP, 8
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
@ -45,9 +38,6 @@ profiler_t jmp = {
[&](zydis_reg_t& vip,
zydis_reg_t& vsp,
hndlr_trace_t& hndlr) -> std::optional<vinstr_t> {
std::printf("> found a jmp...\n");
std::getchar();
const auto& instrs = hndlr.m_instrs;
const auto xchg = std::find_if(
instrs.begin(), instrs.end(), [&](const emu_instr_t& instr) -> bool {

27
src/vmprofiles/lconst.cpp
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@ -5,32 +5,11 @@ profiler_t lconst = {
"LCONST",
mnemonic_t::lconst,
{{// MOV REG, [VIP]
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return vm::utils::is_mov(instr) &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_MEMORY &&
instr.operands[1].mem.base == vip;
},
IMM_FETCH,
// SUB VSP, OFFSET
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_SUB &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
instr.operands[0].reg.value == vsp &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_IMMEDIATE;
},
SUB_VSP,
// MOV [VSP], REG
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_MOV &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_MEMORY &&
instr.operands[0].mem.base == vsp &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_REGISTER;
}}},
STR_VALUE}},
[&](zydis_reg_t& vip,
zydis_reg_t& vsp,
hndlr_trace_t& hndlr) -> std::optional<vinstr_t> {

27
src/vmprofiles/lreg.cpp
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@ -5,14 +5,7 @@ profiler_t lreg = {
"LREG",
mnemonic_t::lreg,
{{// MOV REG, [VIP]
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return vm::utils::is_mov(instr) &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_MEMORY &&
instr.operands[1].mem.base == vip;
},
IMM_FETCH,
// MOV REG, [RSP+REG]
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
@ -24,23 +17,9 @@ profiler_t lreg = {
instr.operands[1].mem.index != ZYDIS_REGISTER_NONE;
},
// SUB VSP, OFFSET
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_SUB &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
instr.operands[0].reg.value == vsp &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_IMMEDIATE;
},
SUB_VSP,
// MOV [VSP], REG
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_MOV &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_MEMORY &&
instr.operands[0].mem.base == vsp &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_REGISTER;
}}},
STR_VALUE}},
[&](zydis_reg_t& vip,
zydis_reg_t& vsp,
hndlr_trace_t& hndlr) -> std::optional<vinstr_t> {

18
src/vmprofiles/sreg.cpp
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@ -5,14 +5,7 @@ profiler_t sreg = {
"SREG",
mnemonic_t::sreg,
{{// MOV REG, [VSP]
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return instr.mnemonic == ZYDIS_MNEMONIC_MOV &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_MEMORY &&
instr.operands[1].mem.base == vsp;
},
LOAD_VALUE,
// ADD VSP, OFFSET
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
@ -23,14 +16,7 @@ profiler_t sreg = {
instr.operands[1].type == ZYDIS_OPERAND_TYPE_IMMEDIATE;
},
// MOV REG, [VIP]
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,
const zydis_decoded_instr_t& instr) -> bool {
return vm::utils::is_mov(instr) &&
instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
instr.operands[1].type == ZYDIS_OPERAND_TYPE_MEMORY &&
instr.operands[1].mem.base == vip;
},
IMM_FETCH,
// MOV [RSP+REG], REG
[&](const zydis_reg_t vip,
const zydis_reg_t vsp,

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