Xls.Trojan.Laroux-23 — Office (OLE) / .EXE malware analysis

Static analysis result for SHA-256 2706d986cde3e407…

MALICIOUS

Office (OLE) / .EXE

20.5 KB Created: 1980-01-04 13:51:43 Authoring application: Microsoft Excel
MD5: 9576706099152e2eec44c3d562c7a161 SHA-1: f3f6b9944f11a285cc4c4e4f25888b1dbf7cd16e SHA-256: 2706d986cde3e4078e334d2740ca876a2f834aa354e0fd73c02fce0821462129
180 Risk Score

Malware Insights

Xls.Trojan.Laroux-23 · 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-23. 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 2069 bytes, indicating a significant amount of code that likely performs malicious actions such as downloading and executing further payloads.

Heuristics 4

  • ClamAV: Xls.Trojan.Laroux-23 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Laroux-23
  • 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
4bdbce366a13c17f10a5a7d10b3db32a7d6e0cc6bf39678b880951e102e96e63		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2069 bytes
Detection
ClamAV: Xls.Trojan.Laroux-23
Obfuscation or payload: unlikely

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