Xls.Trojan.Laroux-32 — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 67f2dacb7401dc04…

MALICIOUS

Office (OLE) / .XLS

82.5 KB Created: 2000-05-16 17:04:54
MD5: 87401b8446c2f8095e1771111ca5db02 SHA-1: f9b063bb2ede7af0e2d4dead2885478d9c7db594 SHA-256: 67f2dacb7401dc0430e323b4139f805698c7602606714dc0ed2006ae21b9ffa6
180 Risk Score

Malware Insights

Xls.Trojan.Laroux-32 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The file is identified as malicious by ClamAV with the signature Xls.Trojan.Laroux-32. It contains an Auto_Open VBA macro that copies the workbook to the Excel startup directory as RESULTS.XLS. This behavior is consistent with malware designed to establish persistence or download and execute a second-stage payload.

Heuristics 4

  • ClamAV: Xls.Trojan.Laroux-32 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Laroux-32
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
555d74d946a9ec8ec2398ad329caa3dc802543a0ec11164a835c5596c3ce472a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2217 bytes
Detection
ClamAV: Xls.Trojan.Laroux-32
Obfuscation or payload: unlikely

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