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

Static analysis result for SHA-256 a1a6c4461475244f…

MALICIOUS

Office (OLE) / .XLS

299.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-27
MD5: 5288ef731294938ff80eaa1a29fd4b72 SHA-1: 951ec77e8f249d1a98eb5eeacf74418a2a7b44d1 SHA-256: a1a6c4461475244ff974e46da90a9466be92447d36d2412c2f0c70c9af68c782
70 Risk Score

Malware Insights

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

The sample is an Excel spreadsheet that exploits CVE-2017-0199 via an OLE2Link object. This vulnerability allows it to download and execute a secondary payload from the embedded URL: http://1234567890OOOOOOOOOOOOOOOOOOOOOOO@146.70.145.168/00000000000_OOOOOOO_ooooooo_ooOOOOOOO_OOOOO/OOOOOOOOOO_OOOOOOO_OOO.doc. Although the VBA project itself contains no executable statements, the exploit mechanism is clearly identified.

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://1234567890OOOOOOOOOOOOOOOOOOOOOOO@146.70.145.168/00000000000_OOOOOOO_ooooooo_ooOOOOOOO_OOOOO/OOOOOOOOOO_OOOOOOO_OOO.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: MBD021ED58F/Ole10Native 50530 bytes

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