Malicious Office (OLE) / .EXE — malware analysis report

Static analysis result for SHA-256 5804360fc1689005…

MALICIOUS

Office (OLE) / .EXE

51.5 KB Created: 1998-06-16 14:57:35 Authoring application: Microsoft Excel
MD5: 1aa000acfa4f6c6a58ab3bec6a2134a7 SHA-1: e632e581f09c16c17521cf510a82a08339672b38 SHA-256: 5804360fc1689005daa6bc5b593c77d8a57cf26d1d9a00b2ecf4123f2f942cea
180 Risk Score

Malware Insights

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

The file is an Excel document containing a malicious VBA macro, specifically an Auto_Open macro, which is a common technique for initial execution. ClamAV identifies this as Xls.Trojan.Laroux-28, a known macro-based malware family. The macro source is 3066 bytes, indicating significant malicious code. The document body contains 'laroux', further supporting the family identification.

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
1bcadc6fd9f4ed7dcd6681c5c9994f76884e9b0228f2e1c6deed515ec956cda6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3066 bytes
Detection
ClamAV: Xls.Trojan.Laroux-28
Obfuscation or payload: unlikely

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