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

Static analysis result for SHA-256 d7e679017bae3d7a…

MALICIOUS

Office (OLE) / .XLS

49.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 1229a7ca9e16bbdc6b60a3654d85530f SHA-1: 278cb85ffaf2f0f0aa5550137608e905a7623984 SHA-256: d7e679017bae3d7ab05e80e406bb6ff06a3e46ba3078d007ae70065ec43d74f5
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1071.001 Web Protocols

The sample is an Excel 4.0 (XLM) macro sheet. The 'OLE_XLM_DANGEROUS_FN' heuristic indicates the presence of a risky formula, specifically 'RUN=0', which is used to execute external commands. The 'SE_ENABLE_LURE' heuristic confirms that the document attempts to trick the user into enabling macros. The macro sheet contains formulas that construct a URL and a file path, 'http://pramars.xyz/psswhqxs/222222.png' and 'C:\ProgramData\Triolexplorer\222222.png' respectively. The macro likely downloads a file from the URL and saves it to the specified path, intending to execute it as a second-stage payload.

Heuristics 4

  • XLM Auto_Open with dangerous formula APIs high 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
  • 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://pramars.xyz/psswhqxs/222222.png�
    • http://pramars.xyz/psswhqxs/222222.png

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
b85a04030ee15a5823afbe8a5c58782f7c760714b2f75fcf902d376138ea1320		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 2772 bytes

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