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

Static analysis result for SHA-256 07cf11ef78b1daac…

MALICIOUS

Office (OLE) / .XLS

70.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 602e35f154205b05229790f479e16610 SHA-1: bfed707d7ec9c82770e40d8136082910709df4bb SHA-256: 07cf11ef78b1daacebb01f915f96d3b08e3ce8a14597a616e0adff0ffd5c6c2a
170 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file contains Excel 4.0 macros with an Auto_Open entry, which is a known technique for executing malicious code upon opening. The macros utilize dangerous API functions like RUN, suggesting an attempt to download and execute a second-stage payload from the provided URLs. The presence of an 'enable macros' lure further supports the malicious intent.

Heuristics 6

  • 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.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • 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
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • 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://arixplanet.ir/hcjophefnp/D�
    • http://arixplanet.ir/hcjophefnp/238428.png
    • http://arixplanet.ir/hcjophefnp/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
e573c1d8ad546b6d6fe12f76ac457539e7c9fcfef0650d765e6634d3478be772		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3702 bytes
macros.bas
8f1da3b9cfde2aea8d3e5eefb2ed308ddd13ef0003e05a3e9976c57190d9580d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2647 bytes

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