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

Static analysis result for SHA-256 d1f45f9c1eaf080a…

MALICIOUS

Office (OLE) / .XLS

973.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 0d0aa5f5fa4a280434f14f579a805bd3 SHA-1: 84b8cac5cefc690e0e1aa0ae7f36e8a1e0af9de0 SHA-256: d1f45f9c1eaf080a0677d456f77703ab9771bad512d52f8c1b72b47f544200ac
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: User Execution of Malicious File T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing for CVE_2017_0199 indicates that the OLE object is designed to exploit a vulnerability to load remote content. The extracted URL is highly suspicious and likely serves as the source for a second-stage payload. The ClamAV detection further confirms the malicious nature of the file, identifying it as a downloader. No VBA scripts were extracted, but the exploit itself is sufficient to classify the attack pattern.

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.
  • ClamAV: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
382fc1344a2f0cf6eda18645d41def8d571debc6637bc7fe02a5c83715a51bef
vba-macro oletools.olevba.extract_macros (decoded VBA source) 2112 bytes