Xls.Trojan.Laroux-29 — Office (OLE) / .EXE malware analysis

Static analysis result for SHA-256 a3524e418cf678b3…

MALICIOUS

Office (OLE) / .EXE

37.0 KB Created: 1980-01-04 11:38:01 Authoring application: Microsoft Excel
MD5: 6c5d36505641030ef7e2b0c1e59d6ff1 SHA-1: fe65bca0d7070c6a4a07ca38ec1bd7e10f7cba81 SHA-256: a3524e418cf678b32da01fd4a8da4e1e100c6ed505de7c2d8f9a48cca14db2c6
180 Risk Score

Malware Insights

Xls.Trojan.Laroux-29 · 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-29. 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 1864 bytes, indicating a significant amount of code is present. The file is an OLE Excel file, further supporting the macro-based attack vector.

Heuristics 4

  • ClamAV: Xls.Trojan.Laroux-29 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Laroux-29
  • 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
65711b85b1b003bb3519d4fba32349030d21b5c168236ebfee27cbba59ae3af3		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1864 bytes
Detection
ClamAV: Xls.Trojan.Laroux-29
Obfuscation or payload: unlikely

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