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

Static analysis result for SHA-256 d6f991e55ea5d187…

MALICIOUS

Office (OLE) / .XLS

1.68 MB Created: 2015-06-05 18:19:34 Authoring application: Microsoft Excel
MD5: 19ae0e75e490606363567ab7ac5d01fe SHA-1: c8256b4d36cfe9417b55358300d05f66a6db9a52 SHA-256: d6f991e55ea5d1878a577c97a0f6aa3164571b0ed2897136ae93d15737d8113c
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The critical heuristic firing indicates the presence of an Excel 4.0 Auto_Open macro, which is a strong indicator of malicious intent. The document body contains URLs that are likely used to download and execute a second-stage payload, as suggested by the presence of 'RLDownloadToFileA' and the file path '..\GVer.iks'. The XLM macro sheet confirms the auto-execution capability.

Heuristics 3

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • 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://ravepsychiatry.com/t/optonline.php
    • http://ravepsychiatry.com/t/sore.php�
    • http://ravepsychiatry.com/t/sore.php

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
8dc0696af778b4720cf9b83a683d4982f5831ab48e06935822f0139385499d0f		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3130 bytes

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