blackflag/IMSI-catcher
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Merge pull request #31 from petterreinholdtsen/track-imsis

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Added code to track how long a IMSI has been seen.
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Oros42 2017-09-17 16:09:56 +02:00 committed by GitHub
commit b5503a757f
1 changed files with 39 additions and 10 deletions
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31
simple_IMSI-catcher.py
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@ -70,6 +70,7 @@ import socket
imsitracker = None
class tracker:
imsistate = {}
# phones
imsis=[] # [IMSI,...]
tmsis={} # {TMSI:IMSI,...}
@ -214,6 +215,8 @@ class tracker:
def register_imsi(self, arfcn, imsi1="", imsi2="", tmsi1="", tmsi2="", p=""):
do_print=False
n=''
if imsi1: self.imsi_seen(imsi1, arfcn)
if imsi2: self.imsi_seen(imsi2, arfcn)
if imsi1 and (not self.imsi_to_track or imsi1[:self.imsi_to_track_len] == self.imsi_to_track):
if imsi1 not in self.imsis:
# new IMSI
@ -260,7 +263,13 @@ class tracker:
if imsi2:
self.pfields(str(n), self.str_tmsi(tmsi1), self.str_tmsi(tmsi2), imsi2, str(self.mcc), str(self.mnc), str(self.lac), str(self.cell), p)
if not imsi1 and not imsi2 and self.show_all_tmsi:
if not imsi1 and not imsi2:
# Register IMSI as seen if a TMSI believed to
# belong to the IMSI is seen.
if tmsi1 and tmsi1 in self.tmsis \
and ""!= self.tmsis[tmsi1]:
self.imsi_seen(self.tmsis[tmsi1], arfcn)
if self.show_all_tmsi:
do_print=False
if tmsi1 and tmsi1 not in self.tmsis:
do_print=True
@ -270,6 +279,26 @@ class tracker:
self.tmsis[tmsi2]=""
if do_print:
self.pfields(str(n), self.str_tmsi(tmsi1), self.str_tmsi(tmsi2), None, str(self.mcc), str(self.mnc), str(self.lac), str(self.cell), p)
def imsi_seen(self, imsi, arfcn):
now = datetime.datetime.utcnow().replace(microsecond=0)
imsi, mcc, mnc = self.decode_imsi(imsi)
if imsi in self.imsistate:
self.imsistate[imsi]["lastseen"] = now
else:
self.imsistate[imsi] = {
"firstseen" : now,
"lastseen" : now,
"imsi" : imsi,
"arfcn" : arfcn,
}
self.imsi_purge_old()
def imsi_purge_old(self):
now = datetime.datetime.utcnow().replace(microsecond=0)
maxage = datetime.timedelta(minutes=10)
limit = now - maxage
for imsi in self.imsistate.keys():
if limit > self.imsistate[imsi]["lastseen"]:
del self.imsistate[imsi]
class gsmtap_hdr(ctypes.BigEndianStructure):
_pack_ = 1