Creaked adverbs are provided in this article. The words listed here are commonly found along with the verb creaked in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb CREAKED.
dismally, loudly
ominously, slightly
slowly, softly
Hope this word list had the creaked adverb you were looking for. In addition to adverbs used with creaked, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.