This assignment can be first obtained from a server node in the upper level of the ExoGeni headquarters on Feros. The terminal is located next to the PSI controls used to sever the Geth Dropship's claw; you will need a good Decryption skill to decrypt it. When you access this node the assignment will first be called Investigate Samples.
The personal log will point you to Chasca in the Matano system of the Maroon Sea cluster. You can also gain this assignment simply by landing there and investigating one of the research stations. As soon as you do the assignment the name will change.
Since all the fighting in this assignment will involve groups of Husks, consider bringing physics-based biotic attacks to keep them off their feet. Singularity, Lift, Throw, Neural Shock, shotguns, Hammerhead Rounds, and Sledgehammer Rounds will all come in handy.
There are two civilian structures and a research base to the southwest of your landing zone. The two structures are on the flats and the base is on the plateau above them. They were originally used by a colonial pioneer team, but the colony has fallen out of contact. Proceed to the structures and when you get close, one of your squadmates will make a comment along the lines of where is everyone. The other will always respond, "I have a bad feeling about this." The two structures have Dragon's teeth around them, so take a guess what you will be facing. One of the structures will have Husks outside it while the other will be clear. Once you have cleared the outside of the structures head inside one.
Southern Structure EditTip: When you see a Husk starting its electrical burst attack, if you immediately knock the husk off its feet by any means the attack will do no damage even though the burst effect will still appear.
Once they all fall, check around the building for crates. The side rooms in this structure are locked and inaccessible. The upper level of this structure only contains two Aid Stations, two medi-gel apiece, and a weapons locker. There is an upgrade kit up here as well if you mount the boxes on the left past the weapons locker. The lower level contains a container in the far corner directly in line with the entrance door, two crates near the farthest pillar from the entrance, a crate near the stairs going to the upper level, and finally a malfunctioning object near the entrance. Once you have everything head out and to the other structure.
Northern Structure Edit
Again this building will have about 10 Husks and the cover is different. Move around to take out the Husks. Just make sure they don't get too close to you. Once they are all dead, move around the room to collect loot. As with the other structure, the side rooms are locked and are inaccessible. The upper level here has more loot in the form of a wetware kit, an upgrade kit, and three storage lockers. The lower level only has a med kit near the side room, which is locked, and a crate in the corner across from the entrance door on the far wall. Once you have everything head to the science station.
Science Station Edit
Once you manage to get up to the plateau, there will be more Husks and Dragon's Teeth outside the entrance of the science station. Take them all out then proceed into the structure. When you enter the science station head to the first room. Don't worry you will not encounter any Husks in this room. So head into the main hold and take out the Husks there. Make sure they don't get near you and backpedal into the entry room if you need to. Once all the Husks are down head to the pillar to the right of the entryway, on the near side for a med kit then into the back rooms. The back room to the left is completely empty, of anything and everything it is just an empty room. So head to the right and in this room are five crates and a terminal. Accessing it will reveal that the entire pioneer team is dead, and whatever 'samples' were provided to Cerberus (possibly referring to the Dragon's Teeth scattered around) effectively murdered dozens of people. Acquiring this information ends the assignment.