Xls.Trojan.Laroux-1 — Office (OLE) / .EXE malware analysis

Static analysis result for SHA-256 ec0e5e646a056507…

MALICIOUS

Office (OLE) / .EXE

51.0 KB Created: 1998-04-08 10:23:40 Authoring application: Microsoft Excel
MD5: 6fb4a620e3df9273b681b6d876892eba SHA-1: 7d7203957fef34a5563aa2a6b920254608b6f655 SHA-256: ec0e5e646a056507f9a6e4b73bd4b3c2c94c62f34817bb2ab6033ab612fcebc5
180 Risk Score

Malware Insights

Xls.Trojan.Laroux-1 · confidence 95%

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

The file is identified as malicious by ClamAV with the signature Xls.Trojan.Laroux-1. Static analysis revealed the presence of VBA macros, specifically an Auto_Open macro, which is a common technique for executing malicious code upon opening the document. The document body contains sheet names typical of Excel files, but no further user-facing content is available for analysis. The primary attack vector is likely through the execution of the embedded VBA macro.

Heuristics 4

  • ClamAV: Xls.Trojan.Laroux-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Laroux-1
  • 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
38b8eb72f08558e6cb746bac40a97963d25540e659ce10b13a8fc6bd163d5f4b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1876 bytes
Detection
ClamAV: Xls.Trojan.Laroux-1
Obfuscation or payload: unlikely

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