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

Static analysis result for SHA-256 1959aeaa132bd1f3…

MALICIOUS

Office (OLE) / .XLS

380.5 KB Created: 2015-06-05 18:19:34 Authoring application: Microsoft Excel
MD5: 075aee1750011e7b583ce80133ea8678 SHA-1: 7842c7e6d4a621844dfab7ebdb78da259abc6dd3 SHA-256: 1959aeaa132bd1f340bd1728f237b28beb9144ba564032fb0ba7448dd5939077
102 Risk Score

Malware Insights

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

The presence of Excel 4.0 macros, specifically an Auto_Open defined name, indicates an attempt to automatically execute code upon opening the document. The document body contains obfuscated strings that appear to be URLs and commands related to downloading and executing a file, likely a second-stage payload. The heuristic 'SE_ENABLE_LURE' further supports that the document is designed to trick the user into enabling macro execution.

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