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letsdefend-write-up-yara-rule libvirt lightsail lightweight distro linkding linkerd linux Linux linux development linux from scratch linux kernel linux kernel compilation linux system linux-kernel Linux-Kernel linux-security Linux-Security LiveData liveness lkl Llama-3.1 Llama3 llm LLM llm-activations llm-agents llm-alignment llm-coding llm-distillation llm-guard llm-guardrails llm-influence llm-privacy llm-reliability llm-safety llm-steering llm-translation llms load-balancing load-testing Lockdown-Mode log log-analysis Log-Analysis Log-Analytics Log-Collection log-ingestion log-management Log-Management log-parsing Log-Processing LogcatUDP logging logs Logstash Logwatch lolbas lolbins low-latency lsm LSM lstm lunarvim lxss MAC Machine Learning machine-learning Machine-Learning machine-translation machine-unlearning machinelearning macos macOS macOS-development macOS-security Maintenance malware Malware Malware Analysis malware-analysis malware-detection Malware-Detection 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thm-blue-teaming thm-write-up-apiwizards-breach thm-write-up-benign thm-write-up-blizzard thm-write-up-block thm-write-up-boogeyman-1 thm-write-up-boogeyman-2 thm-write-up-boogeyman-3 thm-write-up-carnage thm-write-up-dead-end- thm-write-up-disgruntled thm-write-up-disk-analysis-&-autopsy thm-write-up-diskfiltration thm-write-up-diskrupt thm-write-up-exfilnode thm-write-up-hunt-me-i-payment-collectors thm-write-up-investigating-with-splunk thm-write-up-ironshade thm-write-up-itsybitsy thm-write-up-juicy-details thm-write-up-memory-forensics thm-write-up-new-hire-old-artifacts thm-write-up-parrotpost-phishing-analysis thm-write-up-phishing-analysis-tools-(case-1-3) thm-write-up-ps-eclipse thm-write-up-retracted thm-write-up-revil-corp thm-write-up-secret-recipe thm-write-up-slingshot thm-write-up-snapped-phish-ing-line thm-write-up-tardigrade thm-write-up-tempest thm-write-up-the-greenholt-phish thm-write-up-unattended threading Threat Detection Threat Hunting Threat Mitigation 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LetsDefend Write up Malicious Doc
LetsDefend - Malicious Doc#
Created: 10/01/2024 14:04 Last Updated: 05/06/2024 20:03
Malicious Doc
Analyze malicious .doc file
File link: factura.zip
File: /root/Desktop/ChallengeFiles/factura.zip
Password: infected
NOTE: Do not open on your local environment. It is malicious file.
Start Investigation#
VirusTotal#
Uploaded sample doc file to VirusTotal or if you prefer you can use this anyrun report as an alternative
41 security venders flagged this file as malicious and it might exploit a system using CVE-2017-11882
This type of exploit is rtf.exploit
It contacts a HTTP C2 server to download a payload stage as a real malware.
It writes aro.exe after it runs.
File that dropped is also flagged as malcious by 55 security vendors
What type of exploit is running as a result of the relevant file running on the victim machine?
1rtf.exploitWhat is the relevant Exploit CVE code obtained as a result of the analysis?
1CVE-2017-11882What is the name of the malicious software downloaded from the internet as a result of the file running?
1jan2.exeWhat is the ip address and port information it communicates with?
1185.36.74.48:80What is the exe name it drops to disk after it runs?
1aro.exeSummary#
This doc file is a crafted rtf file to exploit remote code execution vulnerability to a system using CVE-2017-11882. It is a stager that once it opened it tries to download an actual malware from a certain URL using HTTP GET method and It also drops a file after it runs.
Badge Acquired
LetsDefend Write up Malicious Doc
https://mranv.pages.dev/posts/letsdefend-write-up-malicious-doc/