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

Static analysis result for SHA-256 1b58259710ba75a5…

MALICIOUS

Office (OLE) / .XLSX

165.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 24395dfa2156fef540691474d4fd54b3 SHA-1: 9fb718f60fc802dddb62d1d440fe08430f659365 SHA-256: 1b58259710ba75a56335e707da29a5e0c1924a4d782f18d0f264d68e5389d6f8
60 Risk Score

Malware Insights

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

The file contains Excel 4.0 (XLM) macros, specifically an Auto_Open macro that utilizes dangerous functions like RUN. This indicates an attempt to execute arbitrary code upon opening the document. The presence of an embedded URL, http://www.chipmania.it/mails/open, strongly suggests that the macro is intended to download and execute a second-stage payload from this location. The document body's content is minimal and appears to be a lure.

Heuristics 3

  • XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • 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://www.iec.ch
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
f72194058b5d1131257adb8047540ae2ca5a2f68446b9907dc98eadcb54b4687		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 1999 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.