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

Static analysis result for SHA-256 85d9bf27885a7688…

MALICIOUS

Office (OLE)

81.5 KB Created: 1999-03-03 18:27:26
MD5: df73286d025f89ad8aa20b71f7abe454 SHA-1: 4fe349f2c76754d1d879ba0de67d673c03bcc0bb SHA-256: 85d9bf27885a768848214255746c7bb5e325ade537a444560fea283f205cd22d
180 Risk Score

Malware Insights

Xls.Trojan.Laroux-28 · confidence 95%

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

The file is identified as malicious by ClamAV with the signature Xls.Trojan.Laroux-28. Static analysis detected 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 content appears to be tabular data related to mapping or surveying projects, which is likely a lure to disguise the malicious macro.

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
71149df7d135795b239029a927afd506bbdc599c394cb1616c19b473c9789048		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 7082 bytes
Detection
ClamAV: Xls.Trojan.Laroux-28
Obfuscation or payload: unlikely

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