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

Static analysis result for SHA-256 69a6217c548edb26…

MALICIOUS

Office (OLE) / .XLS

380.5 KB Created: 2015-06-05 18:19:34 Authoring application: Microsoft Excel
MD5: 86d4e74ef747dd8f69509ebeb9ea999c SHA-1: f093155c01a39ec32c7e1407c673272d20dac349 SHA-256: 69a6217c548edb264124be01bdcaa9acd0bc1825861e0de9ad95a1733db81807
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

The sample is an Excel 4.0 (XLM) macro-enabled workbook that contains an Auto_Open macro. It also includes a lure to enable macros or editing. The macro appears to be designed to download and execute a second-stage payload from one of the two embedded URLs, likely using commands like CALL and RUN. The reconstructed strings from the DOC BODY section, such as 'LOADT File', 'Regi', and 'Server', suggest the execution of downloaded code.

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://thedeformo.com/zrbLAqMKy21Y/lena.html
    • https://faithfulroofingco.com/nmsY1dCNaBRO/lena.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
13ea4a1fd330f9266fa91027043baa61f334e3ac691e10ce14b7c7fee97c551c
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 8812 bytes