Evidence hunting forensic 4 unsolved case code

As soon as he entered the office, Lin Dong received a call from Hou Chu, asking him to call a meeting with the team members, saying that the infection path of the mobile phone virus had some clues.

"This virus infected your mobile phone through the printer in your office."

Hou Chu has been busy with their affairs for the past few days, and all the electronic equipment in the office has been taken away for inspection.After testing, the office computer of the unsolved case team was not infected due to strong protection, and malicious code was detected in the background program of the printer alone.This MSPC60 printer can be connected to a mobile phone for printing operations. Through the interaction with the mobile phone, the virus is implanted in every mobile phone that can use this printer.Fortunately, it did not cause widespread spread. The printer is connected to the office LAN, and only members of the unsolved case team can use it.

Although this matter had nothing to do with Luo Jianan, as a bystander, he was still shocked.Unexpectedly, he could hack into the printer in the dark, this hacker is too awesome!In the past, I only knew that I could query the source of the device and the printing time through the dark spot tracking function that comes with the printer. Now, the printer has become a source of poison.

Listening to Luo Jianan talking to the side, "Even printers are unreliable these days", Hou Chu patiently explained: "Theoretically speaking, any electronic product with a running program can be implanted with a virus. It is a printer driver, as long as the interactive operation is performed, the virus can replicate, and this machine has its own hard disk, and the content you have printed will have stored information, and the person who planted the virus does not need to hijack the phone to get relevant information about the case. "

"I have never used this printer, Hou Chu, I have always used the one in our office." Luo Jianan immediately clarified himself, then remembered something, and asked: "Then the machine in our serious crime office is okay?"

Hou Chu's eyebrows twitched: "All the machines in the world have to be checked, so let us work hard!"

"Then how did the printer get infected with the virus?" Lin Dong was concerned about the source of the virus. As for how much trouble and increased workload the problems in his department caused the technical department, he had no time to take care of them for the time being.

"Currently, it seems that one of you got infected first, and then printed something with the printer, and the virus was passed to the printer, and then the others printed—" Hou Chu clapped his hands, "The whole army overwhelmed."

Ou Jian rubbed his hands secretly and raised his hand: "Then...check the system log and see when it was infected, so you know whose mobile phone it is?"

"Hey, Xiao Ou is right, but this virus is definitely here—" Hou Chu's tone was faintly sympathetic, "It can regularly delete the system log in the background of the printer, and the earliest process that can be found now It was 7 days ago, and whoever sent the print command at that time had a virus process, and it was impossible to tell."

Lin Dong looked around the office. Apart from Yue Lin who was on sick leave at home, Tang Zhexue, Yang Kelin, He Lan and Wen Yingjie were members of the unsolved case team present.However, Yang Kelin's mobile phone was not infected with the virus, so the source was on other people.This "other" includes himself.From taking over the "Sunflower Case" to the present, they have contacted hundreds of people in the process of investigating various cases for several months. Which link, which time and which person went wrong?

"Okay, everyone, I think the technical issues are handled by Hou. He is a big name in the industry, so we have to trust him wholeheartedly, don't we? Let's focus on the case at hand first."

Hearing Luo Jianan praise himself in front of a room full of people, Hou Chu raised his hand and nodded at him—this kid is like that when he attracts people's pain, but when he attracts people's hatred, a thief is not a thing.

Before leaving the house, Hou Chu left a message: "Okay, you guys are busy, I'll go back to work first, Luo Jianan, take your group's computer printers to the Technical Office, and start investigating your serious cases first. "

Luo Jianan slapped the back of Ou Jian's head back: "Go, move the computer."

Ou Jian covered his head in astonishment, with a look of grievance on his face but he didn't dare to say anything - you usually just treat me as a network administrator, why is this a porter? !How many heads do I have and how many hands are enough for you to command?It's better to dismember the body directly!

Waiting for Hou Chu and Ou Jian to leave the house, Lin Dong and Tang Zhexue simultaneously investigated the progress with everyone.According to Yang Kelin's feedback, Tao Zhihui may not be the one who wrote the embedded virus, but he still has the ability to hack the intranet of the mental hospital and open and close the access control of the safe passage through the central control system.And Zhou Wei is his girlfriend and a patient in a mental hospital, so it is very likely that the two will join forces to commit the crime.Lin Dong thought that it was still necessary to get in touch with Zhou Wei. If she could be confirmed to be the "Sunflower Girl" who entered Chen Jun's ward that day, then it would be logical to mention her.

The people Luo Jianan arranged to guard Tao Zhihui's house had never seen Zhou Wei go out, so they couldn't compare it with the screenshot of the video.Tang Zhexue couldn't make an appointment with Tao Zhihui, so he sent a message to say Juju, and the other party replied, "I'm busy recently, I don't have time."

Wen Yingjie had an idea about how to contact Zhou Wei: "Isn't Tao Zhihui's house rented? Why don't you contact the landlord and say that the house is going to be sold, and you need to bring someone over to look at the house or something."

good idea.

Lin Dong nodded to confirm: "Er Ji, you contact the landlord and cooperate with us in the performance. Yingjie, you recognize the person. When the contact is made, you and Lan Lan pretend to be husband and wife and come to the house to inspect the house."

—

At night, Tao Zhihui seemed a little resistant to the landlord's uninvited visit.When he heard that the other party wanted to sell the house, he immediately objected: "The lease was signed for two years, and now I have lived in it for less than half a year. You cannot violate the lease contract."

Seeing that the landlord was at a loss for words for a while, He Lan responded wittily: "Business does not break the lease. We are not in a hurry to live. We just want to buy it when the house price is low. If you want to live, we are willing to continue renting it to you."

Tao Zhihui turned his gaze and stared at He Lan's face, wondering, "What do you do?"

"Ah? I... I'm a lawyer..."

He Lan was a little nervous at first, but after being stared at by him, she subconsciously grabbed Wen Yingjie's hand.Although it was not the first time to work as a make-up reconnaissance, most of the people she faced before were people who had no anti-reconnaissance awareness, and Tao Zhihui was a police student, so she was afraid that she would miss the trick and go back to Lin Dong's training.

Tao Zhihui couldn't tell from the expression what he was thinking, then he turned to Wen Yingjie and asked, "What about you?"

"I'm an interior designer." Wen Yingjie smiled, and held He Lan's hand to give her psychological support, "Sir, we won't bother you too much, just 10 minutes, check the layout of the apartment, I'll go back Good for drawing."

"Wait a minute, I'll get you shoe covers."

With that said, Tao Zhihui opened the door of the shoe cabinet and took out a roll of plastic shoe covers from inside.Wen Yingjie took a quick look and saw a pair of women's flat sandals.So Luo Jianan's judgment is correct, there is indeed a woman living in this house.

Wen Yingjie and He Lan pretended to be discussing where to put what, how to decorate the kitchen and bathroom, what patterns to paste on the tiles, whether to use split air conditioners or not. Central air-conditioning and other problems to reduce Tao Zhihui's vigilance.In order to increase credibility, Wen Yingjie even prepared several sets of interior decoration pictures in the photo album of his mobile phone in advance, and deliberately discussed them in front of Tao Zhihui, so that the other party thought that they were really a young couple who bought a house sincerely.

The door of the second bedroom was closed, and Wen Yingjie asked to open it, but Tao Zhihui refused, because "my roommate is sleeping, so please don't disturb me."It's time for Biao's acting skills, He Lan suddenly became more refined, pulled his face, and challenged Wen Yingjie: "Look at it! I said that this kind of house with tenants is not good for viewing! The one I chose is so good! It also has a And the terrace!"

"Don't be angry, dear, the one you chose is good, but I can't afford it." Wen Yingjie tried his best to act like a worthless son-in-law who was suppressed by his mother-in-law, "Your mother always looked down on me." , Said that I climbed into your house, and I want to borrow money from her to buy a house. She even said that this house type is the most perfect within my ability. When we have children in the future, we can put a house on the balcony. Children's slide."

He Lan refused to let go, and shouted to Wen Yingjie, "What's wrong with my mother? My mother is also doing it for my own good".Tao Zhihui frowned as he listened, and after a stalemate for a while, he spoke to mediate: "Stop arguing, you two, I'll go in and call someone first, you guys wait."

The two who were arguing so loudly shut up for a second, holding their breaths and waiting for the door of the second bedroom to open.

Tao Zhihui stayed in the room for a quarter of an hour, the door of the second bedroom was opened again, but He Lan and Wen Yingjie were not allowed to enter the room, they were only allowed to watch from the door.Soon, the situation in the house was transmitted to Lin Dong's tablet computer through the pinhole camera on He Lan's satchel. There was a person lying on the single bed, with his back facing everyone, and the quilt covered the back of his head, almost covering his entire body.

Still can't tell the difference.In desperation, He Lan pretended to trip and fell into the second bedroom with a "thump".The picture on the tablet continued to shake for a while, and most of the pictures were taken of the floor.When calm was restored again, the people on the bed were still facing the camera with their backs, but there was a little difference from before—the quilt no longer covered the back of the head, but only covered the shoulders.

This means that the person on the bed has moved.

Lin Dong and Tang Zhexue guarded the tablet, anxiously waiting for Wen Yingjie and He Lan to come back with news.After about 10 minutes, the figures of the two finally appeared at the door of the building, and hurried towards Lin Dong's car.

"I've confirmed it, it's Zhou Yuan!"

Wen Yingjie's quick breath and the sound of closing the door sounded at the same time, and He Lan next to him added: "I just fell and startled her, she got up, Yingjie took the opportunity to take a look."

"The cooperation is good, thank you for your hard work." Lin Dong let out a sigh of relief, and then asked concerned: "You didn't hurt from the fall, did you, Lan Lan?"

"No, no, I'm working hard." Fulfilling the mission, He Lan was full of joy, and secretly clamped her scratched hands between her legs.

"It's good that you fight with Yingjie." Tang Zhexue added a compliment, and then asked, "Team leader? Can you mention Tao Zhihui?"

As soon as his eyes sank, Lin Dong closed the tablet, turned his head and looked at the third floor of Building 7——

"Bring it up, even Zhou Qi."

TBC

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I'm sorry I've been a little busy recently, I've run out of manuscripts, try to keep updating~

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