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ADD exercices week 1

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This commit is contained in:
Rémi Heredero 2025-02-24 16:05:42 +01:00
parent f00f74c81f
commit 9df5ce5b66
Signed by: Klagarge
GPG Key ID: 735B36B074A65F0F
32 changed files with 225 additions and 0 deletions
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14
01-VeryEasy1/VE1.txt Normal file
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1. What compiler was used to build this executable?
GCC
2. What is the target platform for this executable?
x86_64
3. Is this executable linked statically or dynamically?
dynamically linked
4. What kind of reverse-engineering information is still embedded in this executable?
?
5. What is the secret password hardcoded into this executable? You need to email this value to pascal+sre25@mod-p.ch before Feb 24th, 2025, 12h00 CET to validate this lab and receive 1 point.
+3kfRmlG1rqb

0
01-VeryEasy1/VeryEasy01.gpr Normal file
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11
01-VeryEasy1/VeryEasy01.rep/idata/00/00000000.prp Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<FILE_INFO>
<BASIC_INFO>
<STATE NAME="CONTENT_TYPE" TYPE="string" VALUE="Program" />
<STATE NAME="PARENT" TYPE="string" VALUE="/" />
<STATE NAME="FILE_ID" TYPE="string" VALUE="a801f6f84e95338696086533" />
<STATE NAME="FILE_TYPE" TYPE="int" VALUE="0" />
<STATE NAME="READ_ONLY" TYPE="boolean" VALUE="false" />
<STATE NAME="NAME" TYPE="string" VALUE="VE1" />
</BASIC_INFO>
</FILE_INFO>

BIN
01-VeryEasy1/VeryEasy01.rep/idata/00/~00000000.db/db.2.gbf Normal file
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5
01-VeryEasy1/VeryEasy01.rep/idata/~index.bak Normal file
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VERSION=1
/
00000000:VE1:a801f6f84e95338696086533
NEXT-ID:1
MD5:d41d8cd98f00b204e9800998ecf8427e

5
01-VeryEasy1/VeryEasy01.rep/idata/~index.dat Normal file
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VERSION=1
/
00000000:VE1:a801f6f84e95338696086533
NEXT-ID:1
MD5:d41d8cd98f00b204e9800998ecf8427e

6
01-VeryEasy1/VeryEasy01.rep/project.prp Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<FILE_INFO>
<BASIC_INFO>
<STATE NAME="OWNER" TYPE="string" VALUE="remi" />
</BASIC_INFO>
</FILE_INFO>

15
01-VeryEasy1/VeryEasy01.rep/projectState Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<PROJECT>
<PROJECT_DATA_XML_NAME NAME="DISPLAY_DATA">
<SAVE_STATE>
<ARRAY NAME="EXPANDED_PATHS" TYPE="string">
<A VALUE="VeryEasy01:" />
</ARRAY>
<STATE NAME="SHOW_TABLE" TYPE="boolean" VALUE="false" />
</SAVE_STATE>
</PROJECT_DATA_XML_NAME>
<TOOL_MANAGER ACTIVE_WORKSPACE="Workspace">
<WORKSPACE NAME="Workspace" ACTIVE="true" />
</TOOL_MANAGER>
</PROJECT>

11
01-VeryEasy1/VeryEasy01.rep/user/00/00000000.prp Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<FILE_INFO>
<BASIC_INFO>
<STATE NAME="CONTENT_TYPE" TYPE="string" VALUE="ProgramUserData" />
<STATE NAME="PARENT" TYPE="string" VALUE="/" />
<STATE NAME="FILE_ID" TYPE="string" VALUE="a801f6f822125986500653561" />
<STATE NAME="FILE_TYPE" TYPE="int" VALUE="0" />
<STATE NAME="READ_ONLY" TYPE="boolean" VALUE="false" />
<STATE NAME="NAME" TYPE="string" VALUE="udf_a801f6f84e95338696086533" />
</BASIC_INFO>
</FILE_INFO>

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01-VeryEasy1/VeryEasy01.rep/user/00/~00000000.db/db.1.gbf Normal file
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4
01-VeryEasy1/VeryEasy01.rep/user/~index.bak Normal file
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VERSION=1
/
NEXT-ID:0
MD5:d41d8cd98f00b204e9800998ecf8427e

5
01-VeryEasy1/VeryEasy01.rep/user/~index.dat Normal file
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VERSION=1
/
00000000:udf_a801f6f84e95338696086533:a801f6f822125986500653561
NEXT-ID:1
MD5:d41d8cd98f00b204e9800998ecf8427e

2
01-VeryEasy1/VeryEasy01.rep/user/~journal.bak Normal file
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IADD:00000000:/udf_a801f6f84e95338696086533
IDSET:/udf_a801f6f84e95338696086533:a801f6f822125986500653561

4
01-VeryEasy1/VeryEasy01.rep/versioned/~index.bak Normal file
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VERSION=1
/
NEXT-ID:0
MD5:d41d8cd98f00b204e9800998ecf8427e

4
01-VeryEasy1/VeryEasy01.rep/versioned/~index.dat Normal file
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VERSION=1
/
NEXT-ID:0
MD5:d41d8cd98f00b204e9800998ecf8427e

0
02-Easy1/E1 Normal file → Executable file
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12
02-Easy1/E1.txt Normal file
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Questions
1. What compiler was used to build this executable?
GCC
2. What is the target platform for this executable?
x86_64
3. Is this executable linked statically or dynamically?
dynamically linked
4. What is the secret password hardcoded into this executable? You must email this value to pascal+sre25@mod-p.ch before Feb 24th, 2025, 12h00 CET to validate this lab and receive 5 points.
DwMxRPg1cjmVTHdV

0
02-Easy1/Easy01.gpr Normal file
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02-Easy1/Easy01.rep/idata/00/00000000.prp Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<FILE_INFO>
<BASIC_INFO>
<STATE NAME="CONTENT_TYPE" TYPE="string" VALUE="Program" />
<STATE NAME="PARENT" TYPE="string" VALUE="/" />
<STATE NAME="FILE_ID" TYPE="string" VALUE="a801f6f9e1526096743070060" />
<STATE NAME="FILE_TYPE" TYPE="int" VALUE="0" />
<STATE NAME="READ_ONLY" TYPE="boolean" VALUE="false" />
<STATE NAME="NAME" TYPE="string" VALUE="E1" />
</BASIC_INFO>
</FILE_INFO>

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02-Easy1/Easy01.rep/idata/~index.bak Normal file
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VERSION=1
/
00000000:E1:a801f6f9e1526096743070060
NEXT-ID:1
MD5:d41d8cd98f00b204e9800998ecf8427e

5
02-Easy1/Easy01.rep/idata/~index.dat Normal file
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VERSION=1
/
00000000:E1:a801f6f9e1526096743070060
NEXT-ID:1
MD5:d41d8cd98f00b204e9800998ecf8427e

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02-Easy1/Easy01.rep/project.prp Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<FILE_INFO>
<BASIC_INFO>
<STATE NAME="OWNER" TYPE="string" VALUE="remi" />
</BASIC_INFO>
</FILE_INFO>

15
02-Easy1/Easy01.rep/projectState Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<PROJECT>
<PROJECT_DATA_XML_NAME NAME="DISPLAY_DATA">
<SAVE_STATE>
<ARRAY NAME="EXPANDED_PATHS" TYPE="string">
<A VALUE="Easy01:" />
</ARRAY>
<STATE NAME="SHOW_TABLE" TYPE="boolean" VALUE="false" />
</SAVE_STATE>
</PROJECT_DATA_XML_NAME>
<TOOL_MANAGER ACTIVE_WORKSPACE="Workspace">
<WORKSPACE NAME="Workspace" ACTIVE="true" />
</TOOL_MANAGER>
</PROJECT>

11
02-Easy1/Easy01.rep/user/00/00000000.prp Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<FILE_INFO>
<BASIC_INFO>
<STATE NAME="CONTENT_TYPE" TYPE="string" VALUE="ProgramUserData" />
<STATE NAME="PARENT" TYPE="string" VALUE="/" />
<STATE NAME="FILE_ID" TYPE="string" VALUE="c0a82f6b4fd12437693729253" />
<STATE NAME="FILE_TYPE" TYPE="int" VALUE="0" />
<STATE NAME="READ_ONLY" TYPE="boolean" VALUE="false" />
<STATE NAME="NAME" TYPE="string" VALUE="udf_a801f6f9e1526096743070060" />
</BASIC_INFO>
</FILE_INFO>

BIN
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02-Easy1/Easy01.rep/user/~index.bak Normal file
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VERSION=1
/
NEXT-ID:0
MD5:d41d8cd98f00b204e9800998ecf8427e

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02-Easy1/Easy01.rep/user/~index.dat Normal file
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VERSION=1
/
00000000:udf_a801f6f9e1526096743070060:c0a82f6b4fd12437693729253
NEXT-ID:1
MD5:d41d8cd98f00b204e9800998ecf8427e

2
02-Easy1/Easy01.rep/user/~journal.bak Normal file
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IADD:00000000:/udf_a801f6f9e1526096743070060
IDSET:/udf_a801f6f9e1526096743070060:c0a82f6b4fd12437693729253

4
02-Easy1/Easy01.rep/versioned/~index.bak Normal file
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VERSION=1
/
NEXT-ID:0
MD5:d41d8cd98f00b204e9800998ecf8427e

4
02-Easy1/Easy01.rep/versioned/~index.dat Normal file
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VERSION=1
/
NEXT-ID:0
MD5:d41d8cd98f00b204e9800998ecf8427e

55
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#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <sys/types.h>
ulong SECRETPASSWORD;
int main(int param_1, int *param_2) {
char* foo = "Hello";
uint8_t string_equality;
uint8_t output_value;
size_t input_length;
uint8_t local_20;
uint8_t itr;
local_20 = 1;
if (true /*param_1 == 2*/) {
itr = 0;
while( true ) {
//input_length = strlen((char *)param_2[1]); // 16
input_length = strlen(foo); // 16
if (16 <= itr) break;
local_20 = (local_20 * 3) % 257;
itr = itr + 1;
}
string_equality = strncmp(
// SECRETPASSWORD = 00402e82
// SECRETPASSWORD + ( (249+226)%257 ) * 8
// SECRETPASSWORD + (475%257) * 8
// SECRETPASSWORD + 218 * 8
// SECRETPASSWORD + 1744
*(char **)(SECRETPASSWORD + (ulong)((local_20 + 226) % 257) * 8),
foo,
16
);
// => DwMxRPg1cjmVTHdV
if (string_equality == 0) {
fprintf(stderr,"\nCongratulations ! The right password is indeed %s :-)\n\n",param_2[1]);
output_value = 0;
}
else {
fwrite("\nWrong password ! Try again...\n\n", 1, 32, stderr);
output_value = 1;
}
}
else {
fwrite("\nMSE-SRE Challenge E1 --- Enjoy !\n", 1, 34, stderr);
fprintf(stderr, "\nUsage: %s <password>\n\n", *param_2);
output_value = 1;
}
return output_value;
}