arjarj

arj is a Unix living-off-the-land binary catalogued by the GTFOBins. Documented abuse functions: file-read, file-write. Mapped ATT&CK techniques (per LOLBAS / GTFOBins → MITRE crosswalk): T1005, T1565. Defenders should monitor execution of arj under non-administrative or sudo contexts and alert when its arguments match the abuse-function signatures.