Hackers Using Weaponized ZIP File To Steal NTLM Hashes

Probability actors exercise ZIP files to weaponize them since they can with out issues bring malicious payloads within compressed archives, making it now not easy for safety programs to detect and witness the file’s contents.

These files might well well furthermore be outdated skool to state quite a lot of files to the target users so as that attackers can take dangle of ultimate thing about vulnerabilities or build a decision of assorted malicious operations as rapidly as these files are extracted.

Unbiased recently, the cybersecurity analysts at ANY.RUN learned that hackers actively exercise the weaponized ZIP file to rob NTLM hashes.

You too can analyze a malware file, network, module, and registry exercise with the ANY.RUN malware sandbox, and the Probability Intelligence Search for that enable you to accept as true with interaction with the OS straight some distance from the browser.

Weaponized ZIP File Rob NTLM Hashes

Cybersecurity researchers warned of a brand recent chance between February 23, 2024, and the latest 2d, when they noticed a mass attack on users.

Right here, all of the scenario begins with the receipt of an e-mail having a ZIP attachment and an inquiry in both English and German that claims, “I sent cloth to your aspect final day accept as true with you in a trouble to to find it?” Amongst these compressed files are two assorted documents, one of which turns out to be a weaponized HTML page”.

The trick right here is that this HTML page might possibly be very unheard of intricately crafted upon a 450-byte template. Extra namely, redirection transfers encrypted HTTP online page traffic by quite a lot of nodes.

Right here is accomplished with the abet of Google App Script (GAS) because it receives requests from compromised programs, and this merchandise employs the SMB protocol for its implementation.

Nonetheless, these attackers accept as true with implemented impacket-smbserver tool on their servers. It provides complexity and sophistication that facets to a successfully-deliberate strategy of their cyber activities.

The following particular person data is obtained by the attackers when the HTML announce material is opened:-

• IP address
• NTLM field data
• Username
• Sufferer’s computer name

MITRE

• Phishing (T1566)
• User and PC name enumeration (T1589)
• NTLM compromise (T1187)

Queries

Right here under, we now accept as true with talked about all of the queries that the consultants recommend:-

• SuricataID:”8001377″
• SuricataID:”8001065″
• SuricataID:”8000547″

Besides this, researchers will help an glimpse on the development of this attack in the hopes that it might possibly possibly well enable users to observe their e-mail attachments on the platform.

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