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

Static analysis result for SHA-256 53be83153f52721d…

MALICIOUS

Office (OLE) / .XLS

246.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-04-01
MD5: 371680e8fb0df514e745cdf764ca5555 SHA-1: f15f4758cb4ea453db6b0da95b959da93899beed SHA-256: 53be83153f52721d8718730f4b8c5e73ce40b782d16b678020cce09bdea2b621
70 Risk Score

Malware Insights

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

The sample is an OLE file that exploits CVE-2017-0199 via a URL moniker to download and execute a remote loader. The embedded URL points to a suspicious domain and path, likely serving the second-stage payload. No VBA macros were found to be executable, but the exploit 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://KKKKKK2K3K3K3K3K3K3K3KK3K3K3KK3K3K3K3KK3K34K4KK5KK5K5K5K5KK5L5K5K5L5KL5K5L5K5LK5L5K5LK5L5K5ERKLERKRELREKLLERKLRLERK4L4K3L4K4L4@107.174.45.106/85..................85.................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