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

Static analysis result for SHA-256 5add9d8cb23a5d9e…

MALICIOUS

Office (OLE) / .XLS

35.0 KB Created: 2004-01-05 16:51:41 Authoring application: Microsoft Excel
MD5: 753b248117905927561e89b73504ba4b SHA-1: 838adb215f59289fe154ec777450d9217d19e226 SHA-256: 5add9d8cb23a5d9ece10787d5505a5f74051409f3240534b47448acb5b544d17
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 identified as a malicious Excel 5 macro-virus (Laroux-CV) by multiple critical heuristics, including ClamAV detections. The auto_open macro in macros.bas is designed to copy itself to the startup path as 'PLDT.XLS', indicating an attempt to establish persistence and likely download a second-stage payload. The presence of the Auto_Open macro and the specific file name 'PLDT.XLS' are strong indicators of this malware family.

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
1ab6eecef12ad4852e62fbd2aaaacd824258ad494f2943ad3bc657703635aee5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2028 bytes
Detection
ClamAV: Xls.Trojan.Laroux-28
Obfuscation or payload: unlikely

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