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

Static analysis result for SHA-256 e0d85f6db5601274…

MALICIOUS

Office (OLE) / .XLS

173.5 KB Created: 2009-04-21 07:01:54 Authoring application: Microsoft Excel
MD5: 3a92ababa29fa1c6c0501a66ea68d14f SHA-1: 387d0d2a5f5927fc7555d5acc41e7fc24eb637f6 SHA-256: e0d85f6db5601274632f810ef220f3e5063a0eabbb6e61685eecb63d5ad6e138
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1566.002 Spearphishing with Other Malicious Documents

The file is an Excel spreadsheet containing VBA macros, specifically an Auto_Open macro, which is a common technique for executing malicious code upon opening. ClamAV detections indicate it is a known trojan. The document body contains what appears to be event planning details, likely a lure to encourage the user to enable macros. No scripts were extracted, but the presence of an Auto_Open macro strongly suggests the intent is to execute malicious code.

Heuristics 5

  • ClamAV: Xls.Trojan.Escape-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Escape-2
  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.db-nozawa.com/isearch/detail.php?_id=66
    • http://www.nagadenbus.co.jp/robus/2009fuyu/nozawawin.htm

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
0d41144d46691a0f6a996dbeae297efe02861a6dcdbf17cb3daf986027c4dcd6
vba-macro oletools.olevba.extract_macros (decoded VBA source) 3841 bytes
Detection
ClamAV: Xls.Trojan.Escape-1
Obfuscation or payload: unlikely