Office (OLE) / .XLSX malware analysis — malicious · dcb9415e6829bd73

MALICIOUS

Office (OLE) / .XLSX

96.5 KB First seen: 2022-08-06

MD5: 0992935f720f08c833dad3571f5ed989 SHA-1: 7e8c8339816aadd863e87ca9342f0e68b11a99dd SHA-256: dcb9415e6829bd734e7d1f96033c3273488f02d7f55acb19f5c77c239ffecf50

142 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing Link

The sample is a password-encrypted Office document containing an OLE object that exploits CVE-2017-0199. This vulnerability allows the document to act as a remote loader, downloading and executing a payload from the embedded URL. The URL http://jmcglone.com@l-inky.com/hvwJp is the primary indicator of the malicious payload's origin.

Heuristics 5

OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199

Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
Default-encrypted OOXML exploit carrier layout high OOXML_ENCRYPTED_EXPLOIT_CARRIER_SHAPE

Default-password encrypted OOXML package contains embedded OLE object parts and additional activation/decoy parts. This layout is common in malicious Excel exploit delivery and requires inspecting the decrypted package.
Office document is password-encrypted medium OFFICE_ENCRYPTED_PACKAGE

OLE container holds MS-OFFCRYPTO encrypted package (Standard Encryption (Office 2007, AES)).
Office OOXML encrypted with default VelvetSweatshop password medium OFFICE_DEFAULT_PASSWORD_ENCRYPTED_OOXML

OLE EncryptedPackage decrypts with Excel's built-in VelvetSweatshop password. Office opens this transparently, and malware uses it to hide OOXML exploit parts from scanners that only inspect the outer OLE container.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://jmcglone.com@l-inky.com/hvwJp

Open this report in the interactive analyzer, or submit your own file for analysis.