Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 7f8c3780744584bc…

MALICIOUS

Office (OLE) / .XLS

200.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d923dc9f1abd640e545d1992bef70fb4 SHA-1: 1c69fd2c258f80163dde3aa3b6e96ae9b4a42fa1 SHA-256: 7f8c3780744584bc15d10cd35195cad98506691e51f75714f35a295e7d4ed638
130 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2017-0199 indicates that the OLE object is designed to exploit this vulnerability to download a remote payload. The embedded URL, https://provit.uk/OAffUi?&chairlift=busy&cockpit=blushing&precipitation=honorable&skill=quizzical&timeout, is the likely source of this payload. Although VBA macros are present, they contain no executable statements, suggesting the exploit is directly leveraged by the OLE structure.

Heuristics 4

  • 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.
  • ClamAV: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • 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 https://provit.uk/OAffUi?&chairlift=busy&cockpit=blushing&precipitation=honorable&skill=quizzical&timeout

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes

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