Paul McGinley completed a round of 70 on Friday. He was joined by Gregory Hanrahan at 6-under-par 138. Terry Price, Thomas Levet and Prayad Marksaeng were one shot further back at 5-under-par 139.
Several players were able to get their rounds in early, but the afternoon brought heavy rains that forced the suspension of the second round. Play is scheduled to resume at 8:00 AM local time Saturday.
Lee, who is deaf, picked up his first birdie of the day on the opening hole of the Palm Course at Saujana Golf & Country Club. He then birdied the par-5 third but found trouble with a bogey at the fifth.
The Korean chipped in for a birdie at the ninth and moved to 6 under with a birdie at the 15th. At the par-4 17th, Lee dropped his approach inside four feet for another birdie to move to 7 under.
Wiratchant started on the 10th with a birdie but stumbled with bogeys on his next two holes. He recovered with a birdie at the 13th and added another at the 15th to reach 3 under.
At the par-5 18th, Wiratchant picked up the first of four consecutive birdies to begin a charge up the leaderboard.
He faltered with consecutive bogeys from the fourth, however, but came right back with back-to-back birdies starting at the sixth en route to a round of 67.
'It's a very tough course, always going up and down, so I am very happy with that score,' said Wiratchant. 'Luckily, I am playing well and when you play well you don't feel tired.'
Colin Montgomerie is among those who were left on the course when the rains came, and the Scot was certainly on a roll.
'I was playing very, very well,' said Montgomerie, who stands at 4 under par through 13 holes. 'So I will sleep better tonight than I did last. I have a long day tomorrow. But I am very confident now.'
Montgomerie collected three birdies over his first six holes before finding trouble with a bogey at the 11th.
He countered with a birdie at the 12th and managed to pick up an eagle at the par-5 13th before play was halted.