Moiraine WAS a darkfriend but was no longer by the time of her disappearance. You may tell yourself, "Not another one of these!" but hear me out.

1. This suspicion was first introduced in TGH when she went on her little retreat the same time the Dark Friend Social was taking place. We saw 2 women there with great serpant rings. Later in TGH we see that the ring was on a different finger than it originally had been.

2. She knows weaves that are forbidden like baelfire. She may have connected with a past life inadvertantly in a time of GREAT need and without knowing what she was doing, figured it out on her own.

3. She knew that it was Sammael that resided in Illian. How? The prophecies werent that specific. I dont think Sammael would have introduced himself to her.

I beleive that Moiraine was a darkfriend, that she turned over to the shadow after the prequel New Spring because she began to feel that the light had no chance over the dark.

This is the same reason that the hardcore shinarean Ingtar turned over. However, I think that by the time she disappeared in TFoH, she had been turned over to the light. She may have begun to question her allegiance to the shadow at the end of TEoTW. She saw that it was possible for rand to defeat and destroy the forsaken. That the light CAN overcome the dark if the wheel wills. If she was a darkfriend, she would know that the Dark One wasnt going to be free for a while. She would know that It was a forsaken that was after Rand in TEoTW. She said "before the dark one has you" because that was who Rand and Co thought was after them. The DO himself.

This now brings us to the fact of who she was employed by. We know that she could have in no way been employed by Ishy. She was trying to keep Rand and Co. from him. She said that she would kill Rand and Co. before she let the Dark One/Balzamon/Ishy have them.

She could have been employed by Sammael which would explain how she knew that it was he that was in Illian and he set the Darkhounds after her to kill her for betraying him in not bringing rand to him. But I doubt that is the case. Why would Sammael want Rand rather than have him killed? For this same reason, i dont think Moiraine was employed by any male forsaken or she would have killed him and the story would be over.

Now, who is the female forsaken that wanted to build rand up because she knew that through him she could rule the world. Lanfear. When Moiraine turned over to the shadow, she could have been picked up by Lanfear and told to continue in her search. She could have been directed to the Two Rivers. She did find him at the same time Ishy did. She was instructed to find Rand, Guide and protect him from any other forsaken that wanted him. This would explain why she didnt kill him when she found him. She could have known that the Raven atop winespring in was sent as a spy for Ishy.

I believe that Fain was working for Ishy and Moiraine for Lanfear.

Lan doesnt know she is a darkfriend. When Rand asked him why she had disappeared, he replied that it wasnt for him or anyone to question, that she likes to take time to herself and retreat. She can mask the bond, her whereabouts/feelings. Allowing her to visit the DF meeting. She does it occasionally, by lan's comment its nothing out of the ordinary any more. She can go to darkfriend socials anytime she wants now. One of the 13 rebel sisters who fled to tear was masking her bond with her warder rather than kill him(due to pain and anguish of doing so). She let the bond slip a few times and found him trying to kill her. He didnt know she was black ajah. Why were there 2 aes sedai at the Social? 1 would have been leader of Black Ajah and the other would have been Moiraine. Black Ajah leader passes all necessary instruction down to each member. There was really only 1 person from each major place in RandLand: Seafolk, domani royal blood, children of the light, etc... They then pass all necessary instruction down to those who follow them. So, why 2 aes sedai that obviosly dont know eachother? 1 is moiraine who isnt black ajah but who has connection's to Rand and the other is the leader of Black Ajah.

Now, we may have a question:

Why was Moiraine at the DF meeting gathered by Ishy if she had opposed him prior. Wouldnt he have tried to kill her instead of giving her instructions? I believe that he didnt know that she was the Aes Sedai that was aiding Rand. Many darkfriends get snatched up by other forsaken even while employed by another. It is possible she received a summons she could not refuse. By this time though, she had already begun to shift back over to the light and her orders were ignored. Ingtar wasnt in the service of Ishy until after TEoTW. Otherwise he would have played a bigger opposing part in book #1. Ishy thought that Rand and Co were going to Tar Valon. He didnt need agents in Fal Dara yet. Another point of view is that according to Ishy when rand talks to him at the end of book #1 is that EVERYTHING went according to his plan. Why kill moiraine if she only played into his plan? Plan went wrong though, take her up since she has connections with rand.

She knew baelfire. Probably taught by Lanfear to use when in dire need. She was taught the affects it would have on the patern in reversing time so to say. If anything did happen to rand, she could have still undone it by using baelfire. When the need is great enough, the forsaken have been known to teach weaves to the "children".

I believe that it was possible for moiraine to have been a darkfriend(not necessarily BA). I believe the clues layed down in TGH were meant to give us the suspicion that would later be battered down and then turn out to be true. It is definately like RJ to do something like this. And Moiraine being turned back over to the light would definately

explain her POVs. In book 1 when Nyn overhears moiraine talking about rand we feel we learn her true intention. It's as good as a POV. Maybe Lanfear's plan is to defeat DO with rand at the last battle. With the CK she knew it was possible. Thus moiraines strong conviction in helping rand to the last battle. We've seen another aes sedai with a conviction to help rand for a smiliar reason. Help rand to last battle so the DO could defeat rand.