If you encounter the following error, the issue is pcaprub uses a hardcoded path for Winpcap.  I downloaded winpcap v4.1.3 and downloaded the dev kit for Winpcap and put it in c:\WpdPack.   Additionally, since I use an x64 machine I had to copy the file C:\WpdPack\Lib\x64\*.lib into C:\WpdPack\Lib and then the compilation worked.

You need pcaprub for things like msf.

C:\dev\kit>gem install pcaprub
Temporarily enhancing PATH for MSYS/MINGW...
Building native extensions. This could take a while...
ERROR: Error installing pcaprub:
ERROR: Failed to build gem native extension.

current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/pcaprub-0.13.0/ext/pcaprub_c
C:/Ruby24-x64/bin/ruby.exe -r ./siteconf20181112-2628-1wqgu6f.rb extconf.rb

[*] Running checks for pcaprub_c code...
platform is x64-mingw32
checking for -lws2_32... yes
checking for -liphlpapi... yes
checking for windows.h... yes
checking for winsock2.h... yes
checking for iphlpapi.h... yes
checking for ruby/thread.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_thread_call_without_gvl()... yes
checking for pcap_open_live() in -lwpcap... no
checking for pcap_setnonblock() in -lwpcap... no
creating Makefile

current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/pcaprub-0.13.0/ext/pcaprub_c
make "DESTDIR=" clean

current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/pcaprub-0.13.0/ext/pcaprub_c
make "DESTDIR="
generating pcaprub_c-x64-mingw32.def
compiling pcaprub.c
In file included from C:/WpdPack/include/pcap/pcap.h:41,
from C:/WpdPack/include/pcap.h:45,
from pcaprub.c:11:
C:/WpdPack/include/pcap-stdinc.h:64: warning: "snprintf" redefined
#define snprintf _snprintf

In file included from C:/Ruby24-x64/include/ruby-2.4.0/ruby/ruby.h:2429,
from C:/Ruby24-x64/include/ruby-2.4.0/ruby.h:33,
from pcaprub.c:1:
C:/Ruby24-x64/include/ruby-2.4.0/ruby/subst.h:6: note: this is the location of the previous definition
#define snprintf ruby_snprintf

In file included from C:/WpdPack/include/pcap/pcap.h:41,
from C:/WpdPack/include/pcap.h:45,
from pcaprub.c:11:
C:/WpdPack/include/pcap-stdinc.h:65: warning: "vsnprintf" redefined
#define vsnprintf _vsnprintf

In file included from C:/Ruby24-x64/include/ruby-2.4.0/ruby/ruby.h:2429,
from C:/Ruby24-x64/include/ruby-2.4.0/ruby.h:33,
from pcaprub.c:1:
C:/Ruby24-x64/include/ruby-2.4.0/ruby/subst.h:7: note: this is the location of the previous definition
#define vsnprintf ruby_vsnprintf

pcaprub.c: In function 'rbpcap_each_data':
pcaprub.c:992:9: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
fno = (int)pcap_getevent(rbp->pd);
^
pcaprub.c:992:7: warning: assignment to 'HANDLE' {aka 'void *'} from 'int' makes pointer from integer without a cast [-W
int-conversion]
fno = (int)pcap_getevent(rbp->pd);
^
pcaprub.c: In function 'rbpcap_each_packet':
pcaprub.c:1034:9: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
fno = (int)pcap_getevent(rbp->pd);
^
pcaprub.c:1034:7: warning: assignment to 'HANDLE' {aka 'void *'} from 'int' makes pointer from integer without a cast [-
Wint-conversion]
fno = (int)pcap_getevent(rbp->pd);
^
pcaprub.c: In function 'rbpcap_thread_wait_handle':
pcaprub.c:1274:7: warning: passing argument 1 of 'rb_thread_call_without_gvl' from incompatible pointer type [-Wincompat
ible-pointer-types]
rbpcap_thread_wait_handle_blocking,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from pcaprub.c:4:
C:/Ruby24-x64/include/ruby-2.4.0/ruby/thread.h:28:7: note: expected 'void * (*)(void *)' but argument is of type 'VALUE
(*)(void *)' {aka 'long long unsigned int (*)(void *)'}
void *rb_thread_call_without_gvl(void *(*func)(void *), void *data1,
^~~~~~~~~~~~~~~~~~~~~~~~~~
linking shared-object pcaprub_c.so
pcaprub.o:pcaprub.c:(.text+0x1a0): undefined reference to `pcap_lib_version'
pcaprub.o:pcaprub.c:(.text+0x1e0): undefined reference to `pcap_findalldevs'
pcaprub.o:pcaprub.c:(.text+0x2b8): undefined reference to `pcap_freealldevs'
pcaprub.o:pcaprub.c:(.text+0x32f): undefined reference to `pcap_lookupnet'
pcaprub.o:pcaprub.c:(.text+0x43d): undefined reference to `pcap_close'
pcaprub.o:pcaprub.c:(.text+0x45a): undefined reference to `pcap_dump_close'
pcaprub.o:pcaprub.c:(.text+0x67c): undefined reference to `pcap_set_timeout'
pcaprub.o:pcaprub.c:(.text+0x6ce): undefined reference to `pcap_list_datalinks'
pcaprub.o:pcaprub.c:(.text+0x707): undefined reference to `pcap_datalink_val_to_name'
pcaprub.o:pcaprub.c:(.text+0x76d): undefined reference to `pcap_free_datalinks'
pcaprub.o:pcaprub.c:(.text+0x782): undefined reference to `pcap_geterr'
pcaprub.o:pcaprub.c:(.text+0x828): undefined reference to `pcap_datalink_name_to_val'
pcaprub.o:pcaprub.c:(.text+0x895): undefined reference to `pcap_set_datalink'
pcaprub.o:pcaprub.c:(.text+0x8b3): undefined reference to `pcap_geterr'
pcaprub.o:pcaprub.c:(.text+0x93f): undefined reference to `pcap_set_snaplen'
pcaprub.o:pcaprub.c:(.text+0x9d4): undefined reference to `pcap_set_promisc'
pcaprub.o:pcaprub.c:(.text+0xae1): undefined reference to `pcap_lookupnet'
pcaprub.o:pcaprub.c:(.text+0xb57): undefined reference to `pcap_compile'
pcaprub.o:pcaprub.c:(.text+0xb6d): undefined reference to `pcap_geterr'
pcaprub.o:pcaprub.c:(.text+0xb9f): undefined reference to `pcap_setfilter'
pcaprub.o:pcaprub.c:(.text+0xbaf): undefined reference to `pcap_freecode'
pcaprub.o:pcaprub.c:(.text+0xbc1): undefined reference to `pcap_geterr'
pcaprub.o:pcaprub.c:(.text+0xbe9): undefined reference to `pcap_freecode'
pcaprub.o:pcaprub.c:(.text+0xc62): undefined reference to `pcap_compile'
pcaprub.o:pcaprub.c:(.text+0xc75): undefined reference to `pcap_geterr'
pcaprub.o:pcaprub.c:(.text+0xc9d): undefined reference to `pcap_freecode'
pcaprub.o:pcaprub.c:(.text+0xccf): undefined reference to `pcap_activate'
pcaprub.o:pcaprub.c:(.text+0xd33): undefined reference to `pcap_close'
pcaprub.o:pcaprub.c:(.text+0xe0b): undefined reference to `pcap_close'
pcaprub.o:pcaprub.c:(.text+0xe43): undefined reference to `pcap_create'
pcaprub.o:pcaprub.c:(.text+0x109e): undefined reference to `pcap_close'
pcaprub.o:pcaprub.c:(.text+0x110d): undefined reference to `pcap_open_live'
pcaprub.o:pcaprub.c:(.text+0x129f): undefined reference to `pcap_open_offline'
pcaprub.o:pcaprub.c:(.text+0x1419): undefined reference to `pcap_open_dead'
pcaprub.o:pcaprub.c:(.text+0x1532): undefined reference to `pcap_dump_open'
pcaprub.o:pcaprub.c:(.text+0x15d9): undefined reference to `pcap_dump_close'
pcaprub.o:pcaprub.c:(.text+0x171e): undefined reference to `pcap_dump'
pcaprub.o:pcaprub.c:(.text+0x17e7): undefined reference to `pcap_sendpacket'
pcaprub.o:pcaprub.c:(.text+0x17fa): undefined reference to `pcap_geterr'
pcaprub.o:pcaprub.c:(.text+0x18ea): undefined reference to `pcap_setnonblock'
pcaprub.o:pcaprub.c:(.text+0x1912): undefined reference to `pcap_dispatch'
pcaprub.o:pcaprub.c:(.text+0x19fd): undefined reference to `pcap_setnonblock'
pcaprub.o:pcaprub.c:(.text+0x1a25): undefined reference to `pcap_dispatch'
pcaprub.o:pcaprub.c:(.text+0x1b35): undefined reference to `pcap_getevent'
pcaprub.o:pcaprub.c:(.text+0x1be3): undefined reference to `pcap_getevent'
pcaprub.o:pcaprub.c:(.text+0x1c91): undefined reference to `pcap_datalink'
pcaprub.o:pcaprub.c:(.text+0x1cdc): undefined reference to `pcap_major_version'
pcaprub.o:pcaprub.c:(.text+0x1d27): undefined reference to `pcap_minor_version'
pcaprub.o:pcaprub.c:(.text+0x1d72): undefined reference to `pcap_snapshot'
pcaprub.o:pcaprub.c:(.text+0x1dca): undefined reference to `pcap_stats'
collect2.exe: error: ld returned 1 exit status
make: *** [Makefile:259: pcaprub_c.so] Error 1

make failed, exit code 2

Gem files will remain installed in C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/pcaprub-0.13.0 for inspection.
Results logged to C:/Ruby24-x64/lib/ruby/gems/2.4.0/extensions/x64-mingw32/2.4.0/pcaprub-0.13.0/gem_make.out

In metasploit there’s a plugin admin/backupexec/dump. This plugin uses the default credentials to login to Veritas backupexec agent and download an arbitrary file. The catch is it downloads it in the MTF (Microsoft Tape Format) file. You need a utility called NTBackup to restore this file. Metasploit authors have conveniently made this available for us at http://metasploit.com/tools/msbksrc.tar.gz.
However, if you compile this file you get an error:
msqic.c:814: error: conflicting types for ‘bques’
This happens because the function prototype is missing.
Goto line 169 of msqic.c file in the source code and add the following line:
int bques(char);
Once you add this, you should be able to make the client and should be able to extract the file from the .mtf file.

So the other day I was on a pen test and I got hold of the hashes. Since my laptop got fried I needed a new version of SMBProxy. There were a few issues that I had with the compilation though. I got a few errors in the file crypto.c.
Moreover, SMBProxy ues crypto library libdes written by Eric Young available here.
I give here a guide to compiling SMBProxy that worked for me.

First, compile and install libdes

1. Download libdes 4.01
2. tar zxvf libdes-4.01.tar.gz
3. cd libdes
4. make gcc
5. sudo make install

Now, you’ll find that the file libdes.a is now in /usr/local/lib.
Second, compile and install SMBProxy. Now here there were a couple of compilation errors that I had to deal with.
Here’s the diff output for crypto.c

trance@z0n3:~/Desktop$ diff smbproxy/crypto.c smbproxy-orig-src/crypto.c
40,41c40
< #include
< #define MD4_SIGNATURE_SIZE 16 --- >
46c45
<> static u_char Get7Bits(UCHAR *input, int startBit) {
58c57
<> static void MakeKey(UCHAR *key, UCHAR *des_key) {
74c73
<> void DesEncrypt(UCHAR *clear, UCHAR *key, UCHAR *cipher) {
85c84
<> void mkResponse(UCHAR **ntlmhash, UCHAR hash[MD4_SIGNATURE_SIZE], UCHAR* challenge) {
88c87
<> UCHAR ntlm_response[24];

Having done this there were still a few issues with the make comand.
The Makefile can be generated by running the following command:

trance@z0n3:~/Desktop/smbproxy-orig-src$ ./configure

Here’s the diff output of the Makefile:

trance@z0n3:~/Desktop$ diff smbproxy/Makefile smbproxy-orig-src/Makefile
10,11c10,11
< smbbf_include =" -Iinclude">
< libs ="">
—
> SMBBF_INCLUDE = -Iinclude
> LIBS = des
31c31
< $(LIBDES) $(LIBS)
—
> $(LIBDES)

The following libraries are required: openssl, openssl-dev, libdes for successfully compiling SMBProxy.

apt-get install openssl openssl-dev