I got the exact same letter in my e-mail a few days ago, and I was glad that I came across your post before I was suckered into giving the any information. Anyway, I also know a few people that work for Haliburton and they said the same, they will never send a contract or any other information to you before they have a face to face interview. And they also told that in this scam they want your passport information so they can use it to make fake passports for illegal's.
Their letter follows:

----- Forwarded Message ----
From: "[email protected]" <[email protected]>

Sent: Thu, December 31, 2009 11:47:38 AM
Subject: Re: LETTER OF AGREEMENT


ATTENTION

we have confirmed your mail, and in the attachment you will find the
letter of agreement form. You need not courier the hard copy of any
filled form as the copy you emailed to me is enough. All
you need do is send back to me via email. We do not want to be a burden on you.

All the positions includes the benefits listed below:

1. Three Bedroom Flat Duplex
2. Medical & Travel Insurance
3. 10 Days Leave / break/ Vacation after every 90 working days
4. Flight Fares (Air Tickets)
5. Education Scheme to expatriates children/family
6. Toyota Camry 2008 2.0 V Model.
7. Your Job Position with our company is the place of Senior Field
supervisor as the Head of department of every foreign Contractors both
on shore and offshore.
8. SALARY IS THE TOTAL SUM OF $29, 000.00 USD (TWENTY NINE
THOUSANDUNITED STATES DOLLARS)
9. WORKING SCHEDULE; MONDAY - THURSDAY.

Note: The nature of your job, is the place of Senior Field supervisor,
as right now our company is currently having a new Refinery
Plant here in Malaysia, And since you will
be the New Senior field supervisor every foreign contractors here
in Malaysia will have to report to you, so you can authorize the report
to the united states of America, for work previews.
You are to send us these documents:
A. A copy of Reference Letter.
B. Scanned copy of your International Passport.
The Documents should be provide to us through scan e-mail
attachment for fast processing, because all
the positions need expatriates who
can be able to start up employment on 25 Jan 2010, and
all the arrangements need to be made as fast as possible.

Further Information:-
Below are more information about the nature of your job and
further more information about provision of Halliburton Oil & Gas Inc.

1. Accommodation & Location -;
Be informed that you will be living in our
base in Sarawak, Malaysia, which is even more closer to office,
If you take this job offer. You will be living alone with your Family if
any in a duplex in Halliburton Finest
Estate Sarawak.
Note: The apartment is fully Furnished has every necessary requirement in it.

2. Nature of Job &
Responsibilities -; Your Job position is the place of SENIOR FIELD SUPERVISOR
Responsibilities- ;
(a.) Assist and support the company in getting reports from
our new plant construction currently going on.
(b.) Get full details of reports from Sub-supervisor from every department
(c.) If satisfied, With the presented reports or documents,
Authorize and sign for approval, But if not satisfied with the reports
or documents, Decline reports and documents for proper completion of
reports or documents.
(d.) Supervision must be done every duty time (Working Hours only).
(e.) All reports must be sent to
Halliburton Oil & Gas Headquarters, in United
states for international preview.

3. Work vacation-; Having your leave depends on when and what
time you want it, as your leave / vacation can be accumulated for you to
have your vacation at the time you want. It must not be after
90 days, After 90 days, if you want you can have your leave but if not
you can have it when you really want.
4. Salary/ Payment-; Salaries are paid every month, which indications
that your salary for a month’s is the total sum of $29, 000.00 USD
(Twenty Nine thousand United States Dollars). Pay Check must be
received every 27th Day of the month with additional monthly
allowance ($5, 500.00 USD).
5.Contract Duration / Contract Renewal -; After contract is over
for the duration of contract signed, we have a lots of
opportunity to either renew contract with the
company or become fully employed, but
certainly Halliburton has a good record of retaining
Contractors/workers. As we are entitled to reduce Unemployment around the world.
6. Airfare / Transportation-;Note: Our company will help send
to you an appointment & invitation letter to be send to the
Malaysia Immigration contacts that will be given to you. Our company
wouldn't be responsible for visa/work permit charges as this is
clearly stated in the Letter of Agreement. But Immediately the Immigration
visa / work permit is approved, Halliburton Oil & Gas Inc. will send Flight tickets,
as noted already Toyota Camry 2008 2.4G model in on standby upon employee's
arrival.
7. Reimbursement -; If it happens that Employee made any charges
on company's half, It's stated in company's policy, that employee/
worker must be reimbursed with additional 10% of the total Funds
spent. So every Worker / employee is well guarantee of reimbursement.
8. Hospitality & Medical Aid -; Every employee working with
Halliburton Oil is entitle to Full health requirements, As there is always
free Medical Aid/Free hospitals for employee & Family to ensure proper
health functions for our workers. Every Hospital Bills are being
taking care of by Halliburton Oil & Gas Inc.
9 Education –; Halliburton provide free education for every employee's child/
Children, At the same time Halliburton will help to give workers more
training and further education of necessary.

Regards
Bar. Najib Mohamed