1) For dressing, whisk together vinegar, oil, sugar, cumin, oregano, salt and black pepper in a small bowl, whisk and set aside.
2) For salad, drain and rinse beans using a large colander. Place beans in a large bowl. Drain corn. Chop bell pepper; add corn and bell pepper to beans.
3) Chop onion and jalapeno peppers. Snip cilantro using kitchen shears. Add onion, jalapeno peppers, cilantro and dressing to bean mixture. Mix gently. Cover and refrigerate 2-3 hours to allow flavors to blend.