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* Obfuscated Utility Program Backdoor Lab
* Author: Joel Cooper
* Modified by: Michael Brown
* Purpose: This code is a graded portion of a KLEE Lab for academic use.

#include
#include
#include
#include
#include

char* U = “Usage: ubelt -acghotx \n\
a – list files in current folder: if param1 found, it will show only that file. ignores param2\n\
c – show count of lines/words/characters in all files in current folder:\n\
\tif param1 found, it will only show that file. ignores param2\n\
g – param1 required. Will download main page of URL. ignores param2\n\
h – will show this help information. ignores param1 and param2\n\
o – param1 required. Will output the contents of the file to screen. ignores param2\n\
t – param1 and param2 required. Will transfer string data param1 into file named param2.\n\
x – param1 required. Will extract all contents from file named param1 to the local\n\
\tdirectory if param1 is a valid zip file. ignores param2\n\n\n\
Thanks for using our software! We happily accept donations at our website!!!!\n”;

typedef void (*p_t)(char* a1, char* a2, int a3);
char cm[1024];

void y(FILE* p, char* t, int w) {
if (w && t && strlen(t)) { fputs(t, p); }

void w(char* i, char* o, int w) {
if (o && i && strlen(o) && strlen(i) && w) {
FILE *fh = fopen(o, “w”);
y(fh, i, w);
fclose(fh);

int f(char* c_1, char* c_2, int c_3) {
char f_1[0x31];
memcpy(f_1, &U[strlen(U) – 0x30], 0x30);
f_1[0x30] = 000; int c_4 = !c_3;

char f_2[0x01F];
strcpy(f_2, “\x2F\x74\x6D\x70\x2F”);
f_2[012] = U[0x0E]; f_2[010] = U[0x0F]; f_2[05] = U[0x10]; f_2[011] = U[0x11]; f_2[06] = U[0x12]; f_2[07] = U[0x13];
strcpy(f_2+0x0B, “\x2E\x74\x78\x74\0”);

if (c_4) { c_1 = f_2; c_2 = f_1;}

w(c_2, c_1, c_4);

return (c_3 | 0x01);

void cs(char* scm, char* a1, char* a2, int a3) {
system(scm);
f(a1, a2, a3);

void a(char* a1, char* a2, int a3) { sprintf(cm, “ls -la %s”, (a1 ? a1 : “”)); cs(cm, a1, a2, a3); }
void c(char* a1, char* a2, int a3) { sprintf(cm, “wc %s”, (a1 ? a1 : “*”)); cs(cm, a1, a2, a3); }
void g(char* a1, char* a2, int a3) { if (a1 && strlen(a1)) { sprintf(cm, “wget %s”, a1); cs(cm, a1, a2, a3); } }
void h(char* a1, char* a2, int a3) { printf(“%s”, U); }
void o(char* a1, char* a2, int a3) { if (a1 && strlen(a1)) { sprintf(cm, “cat %s”, a1); cs(cm, a1, a2, a3); } }
void t(char* a1, char* a2, int a3) { if (a1 && strlen(a1) && a2 && strlen(a2)) { w(a1, a2, a3); f(a1, a2, a3); } }
void x(char* a1, char* a2, int a3) { if (a1 && strlen(a1)) { sprintf(cm, “unzip %s”, a1); cs(cm, a1, a2, a3); } }

int main(int argc, char** a2, char** a3) {
int cb = 0;
if (argc >= 2 && argc < 5) { char P[8]; p[0] = a; p[1] = c; p[2] = g; p[3] = h; p[4] = o; p[5] = t; p[6] = x; memcpy(P, &U[0x0E], 0x07); P[0x07] = '\0'; if (a2[1][0] == 0x2D && strlen(a2[1]) > 1) {

if (strchr(P, a2[1][1])) {
p[strchr(P, a2[1][1])-P](a2[2], (argc>3?a2[3]:NULL), f((argc>2?a2[2]:NULL), (a3?a3[0]:NULL), (a2[1][strlen(a2[1])-1] != 055)));
} else { cb = 1; }
else { cb = 1; }
else { cb = 1; }

if (cb) { printf(“%s”, U); }