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

Static analysis result for SHA-256 fbb74b940d6b2fe2…

MALICIOUS

Office (OLE) / .XLS

133.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 892e3dd9b3ea64ab60203a47a877ab74 SHA-1: 6bd92ecfccb7272f43a135ca2018166f898c20ec SHA-256: fbb74b940d6b2fe209916c4d724717bbc168d3827ae5f70ebbace76d9023b7f2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an Excel spreadsheet containing VBA macros, with both Auto_Open and Auto_Close subroutines present. The Auto_Open macro attempts to run a command from a specific sheet and cell ('Niola'!H1), and the Auto_Close macro appears to be a placeholder. The presence of embedded URLs suggests the macro is intended to download and execute a second-stage payload. The ClamAV detection name 'Doc.Downloader.Docusign112100-9908075-0' further supports this downloader functionality.

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://5.196.247.6/�
    • http://94.140.112.149/
    • http://84.246.85.196//

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
57dbf314ba8d8e0cd5ae01430a1b3452bf5356fd0c3f739414504ecdf5e48acc		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3568 bytes

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