HTB x Uni CTF 2022 Finals

The latest wave of phishing documents has our team stumped. Figure out what they are doing and get the flag. Category: Forensics Solver: lmarschk, mp455 Flag: HTB{hT4_j4V@sCr1pT_vBs_0h_mY!} Writeup Summary: Deobfuscate the Makro and the JS Script We get a phishing document airship_incognito.doc. When we open the document we get the notification that this document contains macros. Inside the document we see an image that invotes us to the “unveiling of the airship incognito”....

“Random nonces? Where we’re going, we don’t need random nonces!” - D. Brown Category: crypto Solver: 3mb0, nh1729 Flag: HTB{buzzw0rd_s0up_h45_n3v3r_t45t3d_s0_g00d} Writeup For this challenge, we were given a python script that processes the flag and some other file alongside its output and additional files used . import random from Crypto.Util.number import bytes_to_long from functools import reduce def buzzor(b1, b2): return bytes([_b1 ^ _b2 for _b1, _b2 in zip(b1, b2)]) def buzzrandom(): return bytes([random....

New Era Now that Microsoft will disable Macros coming from the web, APT groups look for alternative ways to bypass MOTW. Thus, our SOC team analyses daily, dozens of different container-based malicious document in different file formats. Make sure you analyse this document properly although it seems to be safe. Category: Forensics Solver: 3mb0, mp455 Flag: HTB{sch3dul1ng_t4sks_1s_c00l_but_p0w3rsh3ll_w1th0ut_p0w3rsh3ll_1s_c00l3r} Writeup Summary: Decompile and deobfuscate the VBA p-code. Microsoft wants to fight the macro malware incident rate by denying all macros from documents that are downloaded from the web and therefore have the “Mark of the Web” (MOTW) [1]....

We just launched our brand new pierce inventory which has wide variety of antique jewellery collection. Order before we run out of the stock. Category: Cloud Solver: rgw, linaScience Flag: HTB{f0rg3ry_t0_IMDS_1s_fun!!!} Writeup We get an IP address and run a full port scan with host detection (nmap -p- -A). We see three open ports: PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 8.2p1 Ubuntu 4ubuntu0.2 (Ubuntu Linux; protocol 2.0) | ssh-hostkey: | [....

Relic In some long-forgotten cave, you’ve come across a strange relic of the distant past. Can you reawake it and uncover its secrets? Category: rev Solver: lmarschk, t0b1 Flag: HTB{c0r3_dump5_4r3_c00l_f0r_d3bugg1ng} Writeup Coredump and original script given. Script encrypts a flag, then aborts to generate coredump. Coredump still contains the key. We can get the start of the key by XORing the HTB{ string with the given encrypted flag. Using the start of the key, we can search the coredump for the original key....

In order to automate our procedures, we have created this data collector steam robot that will go out and ask questions on random citizens and store the data in his memory. Our only problem is that we do not have a template of questions to insert to the robot and begin our test. Prepare some questions and we are good to go! Category: pwn Solver: t0b1 Flag: HTB{r0b0fl0w_tc4ch3_p01s0n} Writeup Libc given, 2....

I see you are new in town adventurer! Here you can pick whatever you want to continue your journey. Need a pet companion? Our arachnoids are the best. Ready to fight? Our pistols are here for you. Lost in time? Our watch will definately save you! Category: pwn Solver: t0b1, s3rp3ntL0v3r Flag: HTB{00b_4nd_p1v0t_2_th3_st34m_w0rld!} Writeup See solve script below. Solver from pwn import * LOCAL = False HOST = '167.172.52.221' PORT = 30371 CHALLENGE = '....

Sometimes, you can find patterns in seemingly random things… Category: crypto Solver: 3mb0, nh1729 Flag: HTB{n01sy_LF5R-1s_n0t_l0ud_3n0ugh} Writeup For this challenge, we were given a python script that processes the flag alongside its output. import random from hashlib import sha512 class LFSR: def __init__(self, state, taps): self.state = list(map(int, list("{:0128b}".format(state)))) self.taps = taps def clock(self): outbit = self.state[0] newbit = sum([self.state[t] for t in self.taps]) & 1 self.state = self.state[1:] + [newbit] return outbit key = random....

We just launched an online password management, we would like you to look into our infrastructue and spot any issues. Category: Cloud Solver: rgw, linaScience Flag: HTB{ph00L_T4k3_tHy_pl345UR3_ri9ht_0r_WR0n9!} Writeup We get an IP address and run a full port scan with host detection (nmap -A -p-) and see a few open ports: PORT STATE SERVICE REASON VERSION 22/tcp open ssh syn-ack OpenSSH 8.4p1 Debian 5 (protocol 2.0) | ssh-hostkey: | [....

Steam Door Steam-security analysts have spotted a new unknown persistence technique used in the wild. But they are not able to understand how it works since steam-technology is involving at very fast rates. Please analyse this memory dump and find the persistence mechanism used by the malicious steam actors. Flag format: HTB{md5sum }. For example: HTB{55e7dd3016ce4ac57b9a0f56af12f7c2} Download: drive.google.com/file/d/1OP_r3c9Crvym28suH9K7ro5JNN0Pzx5_ Category: Forensics Solver: lmarschk, mp455 Flag: HTB{db042f659831045cc3748324b481507e} Writeup Summary: Analysis of windows memory dump and file extraction out of it....

UniLab Category: unilab Solver: rgw, linaScience, nh1729 Writeup We get an IP address and run a port scan using nmap. We see only one open port, 80 We open the IP in our browser and get redirected to http://moodle.unilab.htb/. We also the header Server: Microsoft-IIS/10.0. After adding the domain and IP to our hosts file, we see a moodle index page: We register and enroll in the only course available, Linear Algebra 1:...