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

Static analysis result for SHA-256 3c76bd8fd68f63f6…

MALICIOUS

Office (OLE) / .XLSX

136.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: b96b32f844b74fec0c540e548fd11a37 SHA-1: 299d0f8b705bdb48bd2d8db508894800af873cf4 SHA-256: 3c76bd8fd68f63f63680669b0e98ecf46fc48d023783646cdc7f38e69bc826f3
162 Risk Score

Malware Insights

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

The file is an Excel document containing VBA macros, including Auto_Open and Auto_Close, which are commonly used to initiate malicious actions upon opening or closing the document. The ClamAV detection 'Doc.Downloader.Docusign112100-9908075-0' strongly suggests a downloader functionality. The embedded URLs are likely used to fetch and execute a secondary payload. No document body text was available for analysis, but the presence of macros and downloader heuristics indicates a malicious intent to compromise the user's system.

Heuristics 5

  • ClamAV: Doc.Downloader.Docusign112100-9908075-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Docusign112100-9908075-0
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://188.165.62.61/
    • http://79.141.171.170/
    • http://185.244.150.138/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
954b17b40618c472edefb57d86095b1fb0c0b22bc019811f22885378cc130af1
vba-macro oletools.olevba.extract_macros (decoded VBA source) 5040 bytes