Terrorist groups - home based:
Harakat ul-Jihad-i-Islami/Bangladesh (HUJI-B): aim(s): install an Islamic state in Bangladesh
area(s) of operation: headquartered in Bangladesh and mostly active in the southeast; maintains a network of madrassas in Bangladesh; has links with al-Qa'ida and Pakistan-based terror groups advocating similar objectives, including Harakat-ul Jihad Islami (HUJI) and Lashkar e-Tayibba (LeT) (2019)
Islamic State of Iraq and ash-Sham (ISIS) networks in Bangladesh: aim(s): replace the Bangladesh Government with an Islamic state and implement ISIS's strict interpretation of Sharia; ISIS operates in Bangladesh under the name Islamic State in Bangladesh (ISB)
area(s) of operation: operates primarily in Dhaka
note: targets foreigners, foreign aid workers, university professors, students, and secular bloggers for assassination; core ISIS refers to its Bangladesh branch as Bengal (2019)

Terrorist groups - foreign based:
al-Qa'ida (AQ): aim(s): overthrow the Bangladesh Government and, ultimately, establish a pan-Islamic caliphate under a strict Salafi Muslim interpretation of sharia
area(s) of operation: operates in collaboration with its al-Qa'ida in the Indian Subcontinent affiliate
note:  also known as Ansar al-Islam in Bangladesh (2019)
al-Qa'ida in the Indian Subcontinent (AQIS): aim(s): protect Muslims in Bangladesh from perceived injustices and, ultimately, establish an Islamic caliphate in the Indian subcontinent
area(s) of operation: active throughout the country, targeting primarily Military personnel, but also activists, bloggers, academics, and religious minorities
note:  also known as Ansar al-Islam in Bangladesh (2019)