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

Static analysis result for SHA-256 76349f91afddfc66…

MALICIOUS

Office (OLE) / .EXE

23.5 KB Created: 1999-09-08 05:49:21 Authoring application: Microsoft Excel
MD5: 13bb0ba13ad81a0dfa3b747c2aedb01e SHA-1: cc65bf66ba86833bd8cede0b89c5a331f4916c44 SHA-256: 76349f91afddfc66c98d8cf99a357dc2053e4c1607ff92a037bce084303fc70b
240 Risk Score

Malware Insights

Xls.Trojan.Laroux-28 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

This file is identified as Xls.Trojan.Laroux-28, a known macro virus. The Auto_Open macro is configured to execute upon opening, and the script attempts to save a copy of itself as 'PLDT.XLS' in the Excel startup path, indicating a persistence mechanism. The presence of 'laroux' markers and the specific ClamAV detection name strongly support this classification.

Heuristics 5

  • Excel 5 Laroux/Larou-CV macro-virus marker cluster critical OLE_XLS5_LAROUX_MACRO_VIRUS
    Legacy Excel workbook contains a Laroux/Larou-CV macro-virus marker cluster including auto_open execution and workbook/module replication strings. This is a narrow indicator for an infected legacy Excel macro workbook.
  • 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
bf6f76991289dd905c7f37b01ccfeacf87dcd5d7f7b1e26f0274945323b14753		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1999 bytes
Detection
ClamAV: Xls.Trojan.Laroux-28
Obfuscation or payload: unlikely

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