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

Static analysis result for SHA-256 17636b34a3a87106…

MALICIOUS

Office (OLE) / .XLS

1.14 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 04c072eec3c1baece536f532635c85f8 SHA-1: cf84a6abee308c2536be845d47f6bf38a1e0f822 SHA-256: 17636b34a3a87106e373cbcaa40bc58893edc8bda18e402ee94299705d8d2856
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 Visual Basic

The sample is an OLE file identified as malicious due to the CVE-2017-0199 vulnerability. This vulnerability is leveraged to download and execute a remote loader from the URL 'https://go.sunrek.org/kq6Zd5?&walk=loud&hallway=uninterested&monitor=mysterious&sled'. Although VBA macros were extracted, they do not contain executable statements, indicating the exploit relies on the OLE vulnerability itself rather than macro execution.

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 https://go.sunrek.org/kq6Zd5?&walk=loud&hallway=uninterested&monitor=mysterious&sled

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