One often hears of a believer being "under attack" by Satan. It might be a family, group, church, city, country or denomination. Although it does happen (and I think more frequently than most know), I don't like the term or the claim in regards to a situation, at least as I normally hear it applied to anything other than perfectly smooth sailing in life. Why?
But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation: Because they said, He hath an unclean spirit. (Mark 3:29-30)
Matthew 12:31-32 and Luke 12:10 have similar verses but I find this one the clearest, because it most clearly states that attributing the works of the Spirit to Satan is the unpardonable sin. Remember that God will also correct us and that it is a correction to be borne:
Thou shalt also consider in thine heart, that, as a man chasteneth his son, so the LORD thy God chasteneth thee. Therefore thou shalt keep the commandments of the LORD thy God, to walk in his ways, and to fear him. (Deuteronomy 8:5-6)
My son, despise not the chastening of the LORD; neither be weary of his correction: For whom the LORD loveth he correcteth; even as a father the son in whom he delighteth.
And ye have forgotten the exhortation which speaketh unto you as unto children, My son, despise not thou the chastening of the Lord, nor faint when thou art rebuked of him: For whom the Lord loveth he chasteneth, and scourgeth every son whom he receiveth. If ye endure chastening, God dealeth with you as with sons; for what son is he whom the father chasteneth not? But if ye be without chastisement, whereof all are partakers, then are ye bastards, and not sons. Furthermore we have had fathers of our flesh which corrected us, and we gave them reverence: shall we not much rather be in subjection unto the Father of spirits, and live? For they verily for a few days chastened us after their own pleasure; but he for our profit, that we might be partakers of his holiness. Now no chastening for the present seemeth to be joyous, but grievous: nevertheless afterward it yieldeth the peaceable fruit of righteousness unto them which are exercised thereby. (Hebrews 12:5-11)
Is the struggle you face now the Lord chastising you? Is it the Lord strengthening you for further duties down the road? Is it the Spirit working on you for your growth? If yes, then by claiming it as a "Satanic attack", you are skirting closely to blaspheming the Spirit at the very least.
Remember, this isn't to say that Satan isn't attacking you, but don't fall into the habit of blaming Satan for everything that happens to you.