Xls.Trojan.Laroux-28 — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 5e30b4658176eb1b…

MALICIOUS

Office (OLE) / .XLS

46.0 KB Created: 2007-02-05 15:21:38 Authoring application: Microsoft Excel
MD5: 33e1e00a6c40712a6a74093ad31ca358 SHA-1: 14ea86204e31a29a06f80daa774f89edad8c92f3 SHA-256: 5e30b4658176eb1b58f51dc30a9d4a7c84b28b2ce6d9c6f887fe172f8ac2c076
242 Risk Score

Malware Insights

Xls.Trojan.Laroux-28 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is an Excel XLS document containing a VBA macro with an Auto_Open subroutine, a common technique for executing malicious code upon opening. Heuristics indicate it is a known macro-virus (Laroux-CV) and ClamAV confirms this detection. The macro attempts to save itself as 'PLDT.XLS' in the startup path, indicating an attempt to establish persistence and likely download further malicious content.

Heuristics 6

  • Excel 5 Laroux/Larou-CV macro-virus marker cluster critical OLE_XLS5_LAROUX_MACRO_VIRUS
    Legacy Excel workbook contains a Laroux/Larou-CV macro-virus marker cluster including auto_open execution and workbook/module replication strings. This is a narrow indicator for an infected legacy Excel macro workbook.
  • ClamAV: Xls.Trojan.Laroux-28 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Laroux-28
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://www.apple.com/DTDs/PropertyList-1.0.dtd

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d7bf2f91b353bf5927efeaa76fe4f5c61a829bc6c713bdb600e6d42600339b8f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2334 bytes
Detection
ClamAV: Xls.Trojan.Laroux-28
Obfuscation or payload: unlikely

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