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

Static analysis result for SHA-256 1aa8c43b91427bcf…

MALICIOUS

Office (OLE) / .XLS

367.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 33cd28f8fc07977b363885323bf84662 SHA-1: 3dc759eeb3a85a173effb7027e73de308f6b41ca SHA-256: 1aa8c43b91427bcfb8804d1bed0b2a4e50daa3e59f54e9f44fba6cf18908043b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Service Execution: Visual Basic T1204.002 Malicious File: Malicious Link

The file is an Excel spreadsheet containing Excel 4.0 (XLM) macros, specifically an Auto_Open macro, which is a strong indicator of malicious intent. The document body contains text that appears to be a deconstructed URL, and two full URLs were extracted. These URLs are likely used to download a second-stage payload. The presence of an 'enable lure' heuristic further supports the attack pattern of tricking the user into enabling macros.

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