Wednesday, July 24, 2024
EHA

Beware of Malicious Word Documents that Downloads the Ursnif Malware and GandCrab Ransomware

A new phishing email campaign contained a malicious word document with macros downloads and executes Ursnif malware and GandCrab ransomware.

Security researchers from Carbon Black observed the campaign in wild and roughly 180 variants detected.

The first stage of attack starts in delivering of weaponized MS word document to deliver the initial stages, according to metadata it appears the documents prepared on December 17, 2018, and continues up to January 21, 2019. Documents found embedded with VBS macros that contain 18 lines of VBScript.

The Second stage starts with the execution of PowerShell script that creates a web client instances and looks for DownloadString to communicate with C2 server and stores the data in the CommonApplicationData directory.

The attack if successful delivers multiple payloads in the infected machine, “the overall attack leverages several different approaches, which are popular techniques amongst red teamers, espionage focused adversaries, and large scale criminal campaigns,” reads Carbon Black analysis report.

GandCrab Ransomware

The first payload downloaded via the DownloadString method analyzes the system architecture of the compromised system and downloads additional payload from pastebin which is the GandCrab Variant.

The Gandcrab Ransomware is a widespread Ransomware, nowadays it evolves with newly updated futures under constant development to target various countries.

Ursnif Malware

The second payload is the Ursnif executable which harvest the system information, once executed it performs credential harvesting, gathering system and process information, and deploying additional malware samples.

Researchers observed more than 120 different Ursnif variants were hosted and the file name continiously changes in the campaign.

“While researching this campaign approximately 180 variants were located in the wild. Using the VirusTotal Graph functionality these variants could be organized into several groups that were commonly associated by either metadata or document structures.”

Ursnif campaign also spotted by the security researchers from Cisco Talos, the malicious macro contains a single command encoded with base64 and it downloads the Ursnif executable.

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity updates also you can take the Best Cybersecurity courses online to keep your self-updated.

Website

Latest articles

ShadowRoot Ransomware Attacking Organizations With Weaponized PDF Documents

A rudimentary ransomware targets Turkish businesses through phishing emails with ".ru" domain sender addresses....

BreachForumsV1 Database Leaked: Private messages, Emails & IP Exposed

BreachForumsV1, a notorious online platform for facilitating illegal activities, has reportedly suffered a massive...

250 Million Hamster Kombat Players Targeted Via Android And Windows Malware

Despite having simple gameplay, the new Telegram clicker game Hamster Kombat has become very...

Beware Of Malicious Python Packages That Steal Users Sensitive Data

Malicious Python packages uploaded by "dsfsdfds" to PyPI infiltrated user systems by exfiltrating sensitive...

Chinese Hackers Using Shared Framework To Create Multi-Platform Malware

Shared frameworks are often prone to hackers' abuses as they have been built into...

BlueStacks Emulator For Windows Flaw Exposes Millions Of Gamers To Attack

A significant vulnerability was discovered in BlueStacks, the world's fastest Android emulator and cloud...

Google Chrome 127 Released with a fix for 24 Security Vulnerabilities

Google has unveiled the latest version of its Chrome browser, Chrome 127, which is...
Guru baran
Guru baranhttps://gbhackers.com
Gurubaran is a co-founder of Cyber Security News and GBHackers On Security. He has 10+ years of experience as a Security Consultant, Editor, and Analyst in cybersecurity, technology, and communications.

Free Webinar

Low Rate DDoS Attack

9 of 10 sites on the AppTrana network have faced a DDoS attack in the last 30 days.
Some DDoS attacks could readily be blocked by rate-limiting, IP reputation checks and other basic mitigation methods.
More than 50% of the DDoS attacks are employing botnets to send slow DDoS attacks where millions of IPs are being employed to send one or two requests per minute..
Key takeaways include:

  • The mechanics of a low-DDoS attack
  • Fundamentals of behavioural AI and rate-limiting
  • Surgical mitigation actions to minimize false positives
  • Role of managed services in DDoS monitoring

Related Articles