who is it

~# cat Question

Someone just sent you an email claiming to be Google's co-founder Larry Page but you suspect a scam. Can you help us identify whose mail server the email actually originated from? Flag Format: picoCTF{FirstnameLastname}
FILE: email-export.eml

Opening email-export.eml, will gives us what looks to be a scam email. To get the flag we need to find who sent this email. This is what the email looked like.

Received-SPF: pass (google.com: domain of lpage@onionmail.org designates 173.249.33.206 as permitted sender) client-ip=173.249.33.206;
Content-Type: multipart/mixed; boundary="--_NmP-426c22a2e0d8fc9a-Part_1"
From: Larry Page <lpage@onionmail.org>
To: francismanzi@gmail.com
Subject: One million Prize
Date: Fri, 08 Jul 2022 06:19:47 +0000
Message-ID: <03c11cd1-8fd9-584e-c9d7-e53df0faeccc@onionmail.org>
MIME-Version: 1.0

----_NmP-426c22a2e0d8fc9a-Part_1
Content-Type: multipart/alternative;
 boundary="--_NmP-426c22a2e0d8fc9a-Part_2"

----_NmP-426c22a2e0d8fc9a-Part_2
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

Hello dear user, I am Larry Page and I am delighted to announce to you that=
 you
are the 99999999th GMAIL account and for that we want to reward you. =
You've
earned $1,000,000. To claim your prize open the attached file.
----_NmP-426c22a2e0d8fc9a-Part_2
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable

<p>Hello dear user, I am Larry Page and I am delighted to announce to you =
that you are the 99999999th GMAIL account and for that we want to reward =
you. You've earned $1,000,000. To claim your prize open the attached file.=
<br></p>
----_NmP-426c22a2e0d8fc9a-Part_2--

----_NmP-426c22a2e0d8fc9a-Part_1
Content-Type: text/plain; name=attachment.txt
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=attachment.txt

QW1vdW50OiAgJDEsMDAwLDAwMAo=
----_NmP-426c22a2e0d8fc9a-Part_1--

We are able to find the First and Last name of the sender by finding a IP address in the email.

IP Address of Sender: 173.249.33.206

We can use the whois command to find more information about this IP address. Scrolling down will result in the name of the sender, which is our flag.

┌──(tev㉿kali)-[~/pico]
└─$ whois 173.249.33.206

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2024, American Registry for Internet Numbers, Ltd.
#


NetRange:       173.249.0.0 - 173.249.63.255
CIDR:           173.249.0.0/18
NetName:        RIPE
NetHandle:      NET-173-249-0-0-1
Parent:         NET173 (NET-173-0-0-0-0)
NetType:        Early Registrations, Transferred to RIPE NCC
OriginAS:       
Organization:   RIPE Network Coordination Centre (RIPE)
RegDate:        2017-09-14
Updated:        2017-09-14
Ref:            https://rdap.arin.net/registry/ip/173.249.0.0

ResourceLink:  https://apps.db.ripe.net/search/query.html
ResourceLink:  whois://whois.ripe.net


OrgName:        RIPE Network Coordination Centre
OrgId:          RIPE
Address:        P.O. Box 10096
City:           Amsterdam
StateProv:      
PostalCode:     1001EB
Country:        NL
RegDate:        
Updated:        2013-07-29
Ref:            https://rdap.arin.net/registry/entity/RIPE

ReferralServer:  whois://whois.ripe.net
ResourceLink:  https://apps.db.ripe.net/search/query.html

OrgAbuseHandle: ABUSE3850-ARIN
OrgAbuseName:   Abuse Contact
OrgAbusePhone:  +31205354444 
OrgAbuseEmail:  abuse@ripe.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE3850-ARIN

OrgTechHandle: RNO29-ARIN
OrgTechName:   RIPE NCC Operations
OrgTechPhone:  +31 20 535 4444 
OrgTechEmail:  hostmaster@ripe.net
OrgTechRef:    https://rdap.arin.net/registry/entity/RNO29-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2024, American Registry for Internet Numbers, Ltd.
#



Found a referral to whois.ripe.net.

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://apps.db.ripe.net/docs/HTML-Terms-And-Conditions

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '173.249.32.0 - 173.249.63.255'

% Abuse contact for '173.249.32.0 - 173.249.63.255' is 'abuse@contabo.de'

inetnum:        173.249.32.0 - 173.249.63.255
netname:        CONTABO
descr:          Contabo GmbH
country:        DE
org:            ORG-GG22-RIPE
admin-c:        MH7476-RIPE
tech-c:         MH7476-RIPE
status:         ASSIGNED PA
mnt-by:         MNT-CONTABO
created:        2018-08-22T07:28:02Z
last-modified:  2018-08-22T07:28:02Z
source:         RIPE

organisation:   ORG-GG22-RIPE
org-name:       Contabo GmbH
country:        DE
org-type:       LIR
remarks:        * Please direct all complaints about Internet abuse like Spam, hacking or scans *
remarks:        * to abuse@contabo.de . This will guarantee fastest processing possible. *
address:        Aschauer Strasse 32a
address:        81549
address:        Munchen
address:        GERMANY
phone:          +498921268372
fax-no:         +498921665862
abuse-c:        MH12453-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MNT-CONTABO
mnt-ref:        MNT-OCIRIS
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MNT-CONTABO
created:        2009-12-09T13:41:08Z
last-modified:  2021-09-14T10:49:04Z
source:         RIPE # Filtered

person:         Wilhelm Zwalina
address:        Contabo GmbH
address:        Aschauer Str. 32a
address:        81549 Muenchen
phone:          +49 89 21268372
fax-no:         +49 89 21665862
nic-hdl:        MH7476-RIPE
mnt-by:         MNT-CONTABO
mnt-by:         MNT-GIGA-HOSTING
created:        2010-01-04T10:41:37Z
last-modified:  2020-04-24T16:09:30Z
source:         RIPE

% Information related to '173.249.32.0/23AS51167'

route:          173.249.32.0/23
descr:          CONTABO
origin:         AS51167
mnt-by:         MNT-CONTABO
created:        2018-02-01T09:50:10Z
last-modified:  2018-02-01T09:50:10Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.109.1 (SHETLAND)

Flag: picoCTF{WilhelmZwalina}

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Last updated 7 months ago