reversing a binary

[x7r0n]

can anyone help solve this problem.I have a binary which was upx packed and embedded with anti-debugging.when i did a strace after removing antidebugging this was the result:

execve("/bin/ls", ["ls", "RenoRobert_10"], [/* 32 vars */]) = 0

brk(0)                                  = 0x95b7000

access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)

mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb778d000

access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)

open("/etc/ld.so.cache", O_RDONLY)      = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=74776, ...}) = 0

mmap2(NULL, 74776, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb777a000

close(3)                                = 0

access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)

open("/lib/tls/i686/cmov/librt.so.1", O_RDONLY) = 3

read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300\30\0\0004\0\0\0"..., 512) = 512

fstat64(3, {st_mode=S_IFREG|0644, st_size=30684, ...}) = 0

mmap2(NULL, 33364, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb7771000

mmap2(0xb7778000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6) = 0xb7778000

close(3)                                = 0

access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)

open("/lib/libselinux.so.1", O_RDONLY)  = 3

read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0@G\0\0004\0\0\0"..., 512) = 512

fstat64(3, {st_mode=S_IFREG|0644, st_size=104148, ...}) = 0

mmap2(NULL, 109432, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb7756000

mmap2(0xb776f000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18) = 0xb776f000

close(3)                                = 0

access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)

open("/lib/libacl.so.1", O_RDONLY)      = 3

read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\320\26\0\0004\0\0\0"..., 512) = 512

fstat64(3, {st_mode=S_IFREG|0644, st_size=30312, ...}) = 0

mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7755000

mmap2(NULL, 28964, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb774d000

mmap2(0xb7753000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6) = 0xb7753000

close(3)                                = 0

access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)

open("/lib/tls/i686/cmov/libc.so.6", O_RDONLY) = 3

read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0000m\1\0004\0\0\0"..., 512) = 512

fstat64(3, {st_mode=S_IFREG|0755, st_size=1405508, ...}) = 0

mmap2(NULL, 1411496, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb75f4000

mmap2(0xb7747000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x153) = 0xb7747000

mmap2(0xb774a000, 10664, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb774a000

close(3)                                = 0

access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)

open("/lib/tls/i686/cmov/libpthread.so.0", O_RDONLY) = 3

read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0 J\0\0004\0\0\0"..., 512) = 512

fstat64(3, {st_mode=S_IFREG|0755, st_size=117086, ...}) = 0

mmap2(NULL, 98792, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb75db000

mmap2(0xb75f0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14) = 0xb75f0000

mmap2(0xb75f2000, 4584, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb75f2000

close(3)                                = 0

access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)

open("/lib/tls/i686/cmov/libdl.so.2", O_RDONLY) = 3

read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0@\n\0\0004\0\0\0"..., 512) = 512

fstat64(3, {st_mode=S_IFREG|0644, st_size=9736, ...}) = 0

mmap2(NULL, 12408, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb75d7000

mmap2(0xb75d9000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1) = 0xb75d9000

close(3)                                = 0

access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)

open("/lib/libattr.so.1", O_RDONLY)     = 3

read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\360\r\0\0004\0\0\0"..., 512) = 512

fstat64(3, {st_mode=S_IFREG|0644, st_size=17860, ...}) = 0

mmap2(NULL, 20588, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb75d1000

mmap2(0xb75d5000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3) = 0xb75d5000

close(3)                                = 0

mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb75d0000

mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb75cf000

set_thread_area({entry_number:-1 -> 6, base_addr:0xb75cf720, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0

mprotect(0xb75d5000, 4096, PROT_READ)   = 0

mprotect(0xb75d9000, 4096, PROT_READ)   = 0

mprotect(0xb75f0000, 4096, PROT_READ)   = 0

mprotect(0xb7747000, 8192, PROT_READ)   = 0

mprotect(0xb7753000, 4096, PROT_READ)   = 0

mprotect(0xb776f000, 4096, PROT_READ)   = 0

mprotect(0xb7778000, 4096, PROT_READ)   = 0

mprotect(0x8060000, 4096, PROT_READ)    = 0

mprotect(0xb77ab000, 4096, PROT_READ)   = 0

munmap(0xb777a000, 74776)               = 0

set_tid_address(0xb75cf788)             = 1804

set_robust_list(0xb75cf790, 0xc)        = 0

futex(0xbfbd9c50, FUTEX_WAKE_PRIVATE, 1) = 0

futex(0xbfbd9c50, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1, NULL, bfbd9c60) = -1 EAGAIN (Resource temporarily unavailable)

rt_sigaction(SIGRTMIN, {0xb75df410, [], SA_SIGINFO}, NULL, 8) = 0

rt_sigaction(SIGRT_1, {0xb75df8f0, [], SA_RESTART|SA_SIGINFO}, NULL, 8) = 0

rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0

getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0

uname({sys="Linux", node="bt", ...})    = 0

statfs64("/selinux", 84, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=4996876, f_bfree=2069191, f_bavail=1818542, f_files=1253376, f_ffree=790204, f_fsid={-375224842, -865194323}, f_namelen=255, f_frsize=4096}) = 0

brk(0)                                  = 0x95b7000

brk(0x95d8000)                          = 0x95d8000

open("/proc/filesystems", O_RDONLY|O_LARGEFILE) = 3

fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0

mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb778c000

read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tb"..., 1024) = 315

read(3, "", 1024)                       = 0

close(3)                                = 0

munmap(0xb778c000, 4096)                = 0

open("/usr/lib/locale/locale-archive", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)

open("/usr/share/locale/locale.alias", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=2570, ...}) = 0

mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb778c000

read(3, "# Locale name alias data base.\n#"..., 4096) = 2570

read(3, "", 4096)                       = 0

close(3)                                = 0

munmap(0xb778c000, 4096)                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_IDENTIFICATION", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=373, ...}) = 0

mmap2(NULL, 373, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb778c000

close(3)                                = 0

open("/usr/lib/gconv/gconv-modules.cache", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=26048, ...}) = 0

mmap2(NULL, 26048, PROT_READ, MAP_SHARED, 3, 0) = 0xb7785000

close(3)                                = 0

futex(0xb7749a8c, FUTEX_WAKE_PRIVATE, 2147483647) = 0

open("/usr/lib/locale/en_US.UTF-8/LC_MEASUREMENT", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_MEASUREMENT", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=23, ...}) = 0

mmap2(NULL, 23, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7784000

close(3)                                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_TELEPHONE", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_TELEPHONE", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=59, ...}) = 0

mmap2(NULL, 59, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7783000

close(3)                                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_ADDRESS", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_ADDRESS", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=155, ...}) = 0

mmap2(NULL, 155, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7782000

close(3)                                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_NAME", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_NAME", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=77, ...}) = 0

mmap2(NULL, 77, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7781000

close(3)                                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_PAPER", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_PAPER", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=34, ...}) = 0

mmap2(NULL, 34, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7780000

close(3)                                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_MESSAGES", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_MESSAGES", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0

close(3)                                = 0

open("/usr/lib/locale/en_US.utf8/LC_MESSAGES/SYS_LC_MESSAGES", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=57, ...}) = 0

mmap2(NULL, 57, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb777f000

close(3)                                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_MONETARY", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_MONETARY", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=286, ...}) = 0

mmap2(NULL, 286, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb777e000

close(3)                                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_COLLATE", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_COLLATE", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=1170770, ...}) = 0

mmap2(NULL, 1170770, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb74b1000

close(3)                                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_TIME", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_TIME", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=2454, ...}) = 0

mmap2(NULL, 2454, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb777d000

close(3)                                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_NUMERIC", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_NUMERIC", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=54, ...}) = 0

mmap2(NULL, 54, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb777c000

close(3)                                = 0

open("/usr/lib/locale/en_US.UTF-8/LC_CTYPE", O_RDONLY) = -1 ENOENT (No such file or directory)

open("/usr/lib/locale/en_US.utf8/LC_CTYPE", O_RDONLY) = 3

fstat64(3, {st_mode=S_IFREG|0644, st_size=256324, ...}) = 0

mmap2(NULL, 256324, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7472000

close(3)                                = 0

ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0

ioctl(1, TIOCGWINSZ, {ws_row=24, ws_col=80, ws_xpixel=0, ws_ypixel=0}) = 0

stat64("RenoRobert_Contest10", {st_mode=S_IFREG|0766, st_size=802824, ...}) = 0

lstat64("RenoRobert_Contest10", {st_mode=S_IFREG|0766, st_size=802824, ...}) = 0

fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0

mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7471000

write(1, "RenoRobert_10\n", 21RenoRobert_10

)  = 21

close(1)                                = 0

munmap(0xb7471000, 4096)                = 0

close(2)                                = 0

exit_group(0)

note : this is a static binary.