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

Static analysis result for SHA-256 89614ce228a1f439…

MALICIOUS

Office (OLE) / .EXE

140.0 KB Created: 2000-01-11 21:44:28 Authoring application: Microsoft Excel
MD5: 9a884ce05935db96ab567d166bfbf8e6 SHA-1: d11d343c7f71e1ff6929dade31a329cca43f9700 SHA-256: 89614ce228a1f439535812dd27ae7c5e4c43eb195ccf3a795bb375e096087927
240 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Xls.Trojan.Uedasan-1. Static analysis detected VBA macros, specifically an Auto_Open macro, which is a common technique for executing malicious code upon opening the document. The presence of VBA macros and the Auto_Open function suggests the file is designed to run arbitrary code, likely for further payload delivery or system compromise.

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.Uedasan-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Uedasan-1
  • 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
658dec01b748549c7f44dae656b38a4085227ac05214a7d35313beb694f46322		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 22485 bytes
Detection
ClamAV: Xls.Trojan.Uedasan-1
Obfuscation or payload: unlikely

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