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Add x86_84 shellcode

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This commit is contained in:
cocay 2023-11-08 22:26:55 +07:00
parent f88861a87e
commit 54f61f36ab
3 changed files with 86 additions and 40 deletions
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3
macho-go/go.mod
View File

@ -5,10 +5,11 @@ go 1.17
require (
github.com/alecthomas/kong v0.2.16
github.com/sirupsen/logrus v1.8.0
google.golang.org/protobuf v1.26.0
google.golang.org/protobuf v1.31.0
)
require (
github.com/golang/protobuf v1.5.3 // indirect
github.com/magefile/mage v1.10.0 // indirect
github.com/pkg/errors v0.8.1 // indirect
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 // indirect

4
macho-go/go.sum
View File

@ -3,6 +3,8 @@ github.com/alecthomas/kong v0.2.16/go.mod h1:kQOmtJgV+Lb4aj+I2LEn40cbtawdWJ9Y8QL
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/magefile/mage v1.10.0 h1:3HiXzCUY12kh9bIuyXShaVe529fJfyqoVM42o/uom2g=
@ -22,3 +24,5 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=

119
macho-go/pkg/ios/macho/edit.go
View File

@ -467,50 +467,91 @@ func (mc *MachoContext) ReworkForObjc() {
ldr x9, [x8, #8]
br x9
*/
// TODO: fix to work with offset larger than 0xffff
shellcode := []uint32{
0x10000008,
0, // x9 = (offset end of __DATA) - (offset shellcode)
0x8B090108,
0xA8BF23FE,
0xA8BF0BE3,
0xA8BF03E1,
0xF9400109,
0xD63F0120,
0xA9C103E1,
0xA9C10BE3,
0xA9C123FE,
0xF9400509,
0xD61F0120,
}
shellcode := []uint32{}
ins_size_byte := 4
shellcode_offset := text_start - (ins_size_byte * len(shellcode))
main_offset := int(mc.entryoff)
var shellcode_offset int
if mc.header.cputype == 12{
shellcode := []uint32{
0x10000008,
0, // x9 = (offset end of __DATA) - (offset shellcode)
0x8B090108,
0xA8BF23FE,
0xA8BF0BE3,
0xA8BF03E1,
0xF9400109,
0xD63F0120,
0xA9C103E1,
0xA9C10BE3,
0xA9C123FE,
0xF9400509,
0xD61F0120,
}
shellcode_offset = text_start - (ins_size_byte * len(shellcode))
encode_movz := func(v int) uint32 {
return uint32(uint32(v)<<5 | uint32(0x694)<<21 | uint32(0x09))
}
// movz_shellcode_offset := encode_movz(shellcode_offset)
// movz_main_offset := encode_movz(main_offset)
// movz_data_end_offset := encode_movz(data_end)
movz_calculate_offset := encode_movz(data_end - shellcode_offset)
shellcode[1] = movz_calculate_offset
// shellcode[10] = movz_data_end_offset
// shellcode[19] = movz_main_offset
fmt.Printf("// shellcode_offset=%x\n", shellcode_offset)
fmt.Printf("// main_offset=%x\n", main_offset)
fmt.Printf("// data_end=%x\n", data_end)
fmt.Printf("// movz_calculate_offset=%x\n", movz_calculate_offset)
// fmt.Printf("// movz_shellcode_offset=%x\n", movz_shellcode_offset)
// fmt.Printf("// movz_main_offset=%x\n", movz_main_offset)
// fmt.Printf("// movz_data_end_offset=%x\n", movz_data_end_offset)
fmt.Printf("// lc_main_offset=%x\n", lc_main_offset)
} else {
// TODO: fix to work with offset larger than 0xffff
shellcode := []uint32{
0x00058d4c,
0x66000000,
0, // offset
0x57c8014d,
0x41515256,
0x088b4d50,
0x41d1ff41,
0x5e5a5958,
0x488b4d5f,
0xe1ff4108,
}
encode_movz := func(v int) uint32 {
return uint32(uint32(v)<<5 | uint32(0x694)<<21 | uint32(0x09))
shellcode_offset = text_start - (ins_size_byte * len(shellcode))
encode_movz := func(v int) uint32 {
return uint32(uint32(v-7)<<16 | uint32(0xb941))
}
// movz_shellcode_offset := encode_movz(shellcode_offset)
// movz_main_offset := encode_movz(main_offset)
// movz_data_end_offset := encode_movz(data_end)
movz_calculate_offset := encode_movz(data_end - shellcode_offset)
shellcode[2] = movz_calculate_offset
// shellcode[10] = movz_data_end_offset
// shellcode[19] = movz_main_offset
fmt.Printf("// shellcode_offset=%x\n", shellcode_offset)
fmt.Printf("// main_offset=%x\n", main_offset)
fmt.Printf("// data_end=%x\n", data_end)
// fmt.Printf("// movz_calculate_offset=%x\n", movz_calculate_offset)
// fmt.Printf("// movz_shellcode_offset=%x\n", movz_shellcode_offset)
// fmt.Printf("// movz_main_offset=%x\n", movz_main_offset)
// fmt.Printf("// movz_data_end_offset=%x\n", movz_data_end_offset)
fmt.Printf("// lc_main_offset=%x\n", lc_main_offset)
}
// movz_shellcode_offset := encode_movz(shellcode_offset)
// movz_main_offset := encode_movz(main_offset)
// movz_data_end_offset := encode_movz(data_end)
movz_calculate_offset := encode_movz(data_end - shellcode_offset)
shellcode[1] = movz_calculate_offset
// shellcode[10] = movz_data_end_offset
// shellcode[19] = movz_main_offset
fmt.Printf("// shellcode_offset=%x\n", shellcode_offset)
fmt.Printf("// main_offset=%x\n", main_offset)
fmt.Printf("// data_end=%x\n", data_end)
fmt.Printf("// movz_calculate_offset=%x\n", movz_calculate_offset)
// fmt.Printf("// movz_shellcode_offset=%x\n", movz_shellcode_offset)
// fmt.Printf("// movz_main_offset=%x\n", movz_main_offset)
// fmt.Printf("// movz_data_end_offset=%x\n", movz_data_end_offset)
fmt.Printf("// lc_main_offset=%x\n", lc_main_offset)
offset := int64(shellcode_offset)
{
// fix main to point to our newly created shellcode