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

Static analysis result for SHA-256 b9162340a53f47e9…

MALICIOUS

Office (OLE) / .XLS

45.5 KB Created: 2009-12-29 13:51:17 Authoring application: Microsoft Excel
MD5: c7521be81aae87a4dc59ca732e448e55 SHA-1: d67f6e7bbce9576bf8afdc69f9ba801636f0d0b2 SHA-256: b9162340a53f47e97453e6c32080e5ba2033f10b8aef81b1830ec5d6d894e213
180 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 spreadsheet containing VBA macros, specifically an Auto_Open macro, which is a common technique for executing malicious code upon opening. ClamAV identified this as Xls.Trojan.Laroux-28. The presence of the Auto_Open macro strongly suggests the intent is to download and execute a second-stage payload. No specific URLs or other IOCs were extracted beyond the macro filename itself.

Heuristics 5

  • 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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