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

Static analysis result for SHA-256 2e64aef4d796f317…

MALICIOUS

Office (OLE) / .XLS

70.0 KB Created: 2020-09-20 21:17:44
MD5: ae85a1a76c3d440dcc5422e4b757a63d SHA-1: dd928b314efd7edaff5ccbcc1adda3a2ba607118 SHA-256: 2e64aef4d796f317c923abdb1fb2b868683952bb38f20f7abcfe2074410b634d
60 Risk Score

Malware Insights

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

The file is an Excel 4.0 macro-enabled spreadsheet. Heuristics indicate the presence of an Auto_Open macro that uses dangerous functions, specifically the RUN function, which is highly indicative of executing arbitrary code. The embedded URL, although labeled benign, is likely the initial stage for downloading a secondary payload. The macro sheet's structure and the use of XLM macros point towards a downloader or initial access mechanism.

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 https://cutt.ly/6hmPjp2

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
6706ef840e7060228964da1354cfb7d09f3ad98c654978237516a483046991ce
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 1947 bytes