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

Static analysis result for SHA-256 91eb3a0224776c18…

MALICIOUS

Office (OLE) / .XLS

445.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-30
MD5: 9efc50489bec2ee331599c6033a7d5d4 SHA-1: c3145a2c00f3870a8395eb9216a6280c4c60e8e2 SHA-256: 91eb3a0224776c18f0e8be0fdef3132fe9beb93ad29141e2c06c56e1631df06d
70 Risk Score

Malware Insights

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

The sample is an Excel file that exploits CVE-2017-0199 via a URL moniker to download a remote document. The embedded VBA macro, while not containing executable statements itself, is part of the exploit chain. The primary IOC is the URL used for the remote loader, which points to a potentially malicious document.

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://dgdfghfjfghfghfghgfhfghfgsdgfggdfgdfgertdfgdfgdfg@212.193.30.4/h.doc
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
0e74f03b42dbfb73650ae77db35efc03f254670fe5c220fbf54bacb45cb41486		 ole-package OLE Ole10Native stream: MBD00B218AF/Ole10Native 50530 bytes

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