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

Static analysis result for SHA-256 dc7cc79ffff2276f…

MALICIOUS

Office (OLE) / .XLS

487.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-08
MD5: de5e36fbe8c1c159d7bb294233de2ca9 SHA-1: 9a64841182b71373665713b5a70b6856ecaa2828 SHA-256: dc7cc79ffff2276f35bfb22d6c90a3a5ff5084f1f223e067a931a4a2c04b5363
70 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing for CVE_2017_0199 indicates the exploitation of a known vulnerability in OLE2Link to download a remote payload. The embedded URL points to a suspicious domain and IP address, likely serving the secondary stage. No VBA macros were found to be executable, but the vulnerability itself is sufficient for initial compromise.

Heuristics 3

  • 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.
  • 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 http://yyyyyYYYYUUSUUUUUUU3243242UUU23U423U4UU2UWWWWW8W8W7W8WWWWWWW878W8W8WW78WWWW87W87W88WEEW787888W88W8W@154.22.40.229/m...............m......doc

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