def cuckoo_dnsserve(host, port, nxdomain, hardcode):
try:
from scapy.layers.dns import DNS, DNSQR, DNSRR
except ImportError:
sys.exit(
"Currently the DNS serve script is not available due to issues "
"in upstream Scapy for Windows "
"(https://github.com/secdev/scapy/issues/111).")
udps = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udps.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
udps.bind((host, port))
log.info("Listening for DNS queries at %s:%d", host, port)
while True:
data, addr = udps.recvfrom(1024)
p = DNS(data)
rp = DNS(id=p.id, qr=1, qdcount=p.qdcount, ancount=1, rcode=0)
rp.qd = p[DNSQR]
# IN A, actually look the domain up.
if p.opcode == 0 and p[DNSQR].qtype == 1 and p[DNSQR].qclass == 1:
if hardcode:
answer_ip = hardcode
else:
try:
answer_ip = socket.gethostbyname(p.qd[0].qname)
except:
if nxdomain:
answer_ip = nxdomain
else:
rp.ancount = 0
rp.rcode = 3
answer_ip = None
if answer_ip:
rp.an = DNSRR(rrname=p.qd[0].qname,
ttl=60,
rdlen=4,
rdata=answer_ip)
log.debug("IN A %s -> %s.", p.qd[0].qname, answer_ip)
# IN PTR, we reply with NXDOMAIN.
elif p.opcode == 0 and p[DNSQR].qtype == 12 and p[DNSQR].qclass == 1:
rp.ancount = 0
rp.rcode = 3
log.info("IN PTR %s -> NXDOMAIN.", p.qd[0].qname)
else:
rp.ancount = 0
rp.rcode = 2
log.warn(
"Unhandled query %s for %s/%s,%s - answering with servfail.",
p.opcode, p.qd[0].qname, p[DNSQR].qtype, p[DNSQR].qclass)
udps.sendto(rp.build(), addr)
def cuckoo_dnsserve(host, port, nxdomain, hardcode):
if not HAVE_SCAPY:
sys.exit(
"Currently the DNS serve script is not available due to issues "
"in upstream Scapy for Windows "
"(https://github.com/secdev/scapy/issues/111)."
)
udps = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udps.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
udps.bind((host, port))
log.info("Listening for DNS queries at %s:%d", host, port)
while True:
data, addr = udps.recvfrom(1024)
p = DNS(data)
rp = DNS(id=p.id, qr=1, qdcount=p.qdcount, ancount=1, rcode=0)
rp.qd = p[DNSQR]
# IN A, actually look the domain up.
if p.opcode == 0 and p[DNSQR].qtype == 1 and p[DNSQR].qclass == 1:
if hardcode:
answer_ip = hardcode
else:
try:
answer_ip = socket.gethostbyname(p.qd[0].qname)
except:
if nxdomain:
answer_ip = nxdomain
else:
rp.ancount = 0
rp.rcode = 3
answer_ip = None
if answer_ip:
rp.an = DNSRR(
rrname=p.qd[0].qname, ttl=60, rdlen=4, rdata=answer_ip
)
log.debug("IN A %s -> %s.", p.qd[0].qname, answer_ip)
# IN PTR, we reply with NXDOMAIN.
elif p.opcode == 0 and p[DNSQR].qtype == 12 and p[DNSQR].qclass == 1:
rp.ancount = 0
rp.rcode = 3
log.info("IN PTR %s -> NXDOMAIN.", p.qd[0].qname)
else:
rp.ancount = 0
rp.rcode = 2
log.warn(
"Unhandled query %s for %s/%s,%s - answering with servfail.",
p.opcode, p.qd[0].qname, p[DNSQR].qtype, p[DNSQR].qclass
)
udps.sendto(rp.build(), addr)
def dns_serve(args):
udps = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udps.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
udps.bind((args.bind, args.port))
while True:
data, addr = udps.recvfrom(1024)
p = DNS(data)
rp = DNS(id=p.id, qr=1, qdcount=p.qdcount, ancount=1, rcode=0)
rp.qd = p[DNSQR]
# IN A, actually look the domain up.
if p.opcode == 0 and p[DNSQR].qtype == 1 and p[DNSQR].qclass == 1:
if args.hardcode:
answer_ip = args.hardcode
else:
try:
answer_ip = socket.gethostbyname(p.qd[0].qname)
except:
if args.nxdomain:
answer_ip = args.nxdomain
else:
rp.ancount = 0
rp.rcode = 3
answer_ip = None
if answer_ip:
rp.an = DNSRR(
rrname=p.qd[0].qname, ttl=60, rdlen=4, rdata=answer_ip
)
log.debug("IN A %s -> %s.", p.qd[0].qname, answer_ip)
# IN PTR, we reply with NXDOMAIN.
elif p.opcode == 0 and p[DNSQR].qtype == 12 and p[DNSQR].qclass == 1:
rp.ancount = 0
rp.rcode = 3
log.info("IN PTR %s -> NXDOMAIN.", p.qd[0].qname)
else:
rp.ancount = 0
rp.rcode = 2
log.warn(
"Unhandled query %s for %s/%s,%s - answering with servfail.",
p.opcode, p.qd[0].qname, p[DNSQR].qtype, p[DNSQR].qclass
)
udps.sendto(rp.build(), addr)
