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

Static analysis result for SHA-256 99d5ed78e8b114db…

MALICIOUS

Office (OLE) / .EXE

18.5 KB Created: 1980-01-04 13:53:40 Authoring application: Microsoft Excel
MD5: 193266c37d40caab75fa1d776770d412 SHA-1: 66e14a075dc52cf4057d84bd14fa4db68eb5e3ee SHA-256: 99d5ed78e8b114db37d914c3453e9a42e80acae757e04363da9cde612b10d728
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 embedded artifact 'macros.bas' contains the VBA source code. The document body 'laroux, Foglio1' is minimal and does not provide further context on the lure.

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
2c6a42cb4f0b59a04d9fc0e5ff719fdf6d2e357757549708cedc1bf8a7bf18b3		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1908 bytes
Detection
ClamAV: Xls.Trojan.Laroux-1
Obfuscation or payload: unlikely

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