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

Static analysis result for SHA-256 7a4e1b6cfc364e8d…

MALICIOUS

Office (OLE) / .EXE

263.5 KB Created: 1999-04-19 05:43:04 Authoring application: Microsoft Excel
MD5: 25a73462d8611b5dee0725814cf972f0 SHA-1: 50260a1b5b8a7f461da018765c7cb127df38ca86 SHA-256: 7a4e1b6cfc364e8d61e4349a4c33f90988f3682fc1723caed36f0baaef06e83c
180 Risk Score

Malware Insights

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

The file is an OLE executable containing VBA macros, specifically an Auto_Open macro, which is a common technique for initial execution. ClamAV identifies this as Xls.Trojan.Laroux-31. The document body presents financial data, suggesting a lure to encourage macro execution. The Auto_Open macro likely initiates the malicious payload, although the specific actions are not detailed in the provided evidence.

Heuristics 4

  • ClamAV: Xls.Trojan.Laroux-31 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Laroux-31
  • 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
82965028d241fe510521aac82100c57555731bb23fa3d130f429ad193b6ee009		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2198 bytes
Detection
ClamAV: Xls.Trojan.Laroux-31
Obfuscation or payload: unlikely

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