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

Static analysis result for SHA-256 5395e6762ba00160…

MALICIOUS

Office (OLE) / .XLS

25.5 KB Created: 2009-02-26 00:29:05 Authoring application: Microsoft Excel
MD5: e9fe784a618aa24eeac97042c31914ca SHA-1: eec86e38407ab79b12550850f97c6c8483980f53 SHA-256: 5395e6762ba001600d8195de612932ec03d2181df41df3141ee6953aa9067b1f
180 Risk Score

Malware Insights

Xls.Trojan.Laroux-32 · 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-32. Static analysis detected VBA macros, specifically an Auto_Open macro, which is a common technique for executing malicious code upon opening the document. The presence of the Auto_Open macro strongly suggests the intent is to immediately run the embedded malicious script, likely to download and execute a second-stage payload. The document body content appears to be unrelated financial/tax Q&A, suggesting it's a lure.

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
7fd4563796bcd1ebde8da316aeaaaf7bc3e2249e243681153492406f3622230d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1899 bytes
Detection
ClamAV: Xls.Trojan.Laroux-32
Obfuscation or payload: unlikely

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