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

Static analysis result for SHA-256 9b258c01f3e2939a…

MALICIOUS

Office (OLE) / .XLS

367.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 95d6b8dd68e3bbd508aec366aed0e926 SHA-1: 401a2110256708937094018cd58be4d414ef3050 SHA-256: 9b258c01f3e2939ae058ae95584cbbc86f81f737cfceda78a37fc2e3bd4b7b34
102 Risk Score

Malware Insights

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

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro, indicating it will execute automatically when the file is opened. The document body contains text that appears to be part of a URL, and two full URLs were extracted. The presence of an 'enable lure' heuristic suggests the document prompts the user to enable macros. The XLM macro sheet likely contains code to download and execute a payload from one of the provided URLs.

Heuristics 4

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://stateoftheartacademy.com.br/E4V8njAb2/ue.html
    • https://dsafarm.com/h03itpGP/ue.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
e808156aa76369abc653ef5da0e4637a11444d74c8ce4e627b8f3942d60b3178
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 8209 bytes