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

Static analysis result for SHA-256 c341e4683eddb2fe…

MALICIOUS

Office (OLE) / .EXE

46.0 KB Created: 1998-04-09 11:22:57 Authoring application: Microsoft Excel
MD5: 80c21b416fc6d91d652c11d0e9392366 SHA-1: d1f7b2a4b9273e0a4cd4212d5b13edc518081eee SHA-256: c341e4683eddb2fe055ae54daffd51b1d62073254660aa1ebd1ad751573681e4
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 identified as malicious by ClamAV with the signature Xls.Trojan.Laroux-28. 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 macro source is 1998 bytes, indicating a significant amount of code. The document body contains only sheet names, providing no further context on the lure.

Heuristics 4

  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
bf71574956bf9f5504c300f31a0621e050d0dc8a67e11ed8b6e81afccc3cd699		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1998 bytes
Detection
ClamAV: Xls.Trojan.Laroux-28
Obfuscation or payload: unlikely

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