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

Static analysis result for SHA-256 f70e4d87583963ca…

MALICIOUS

Office (OLE) / .XLS

1020.5 KB Created: 2005-03-08 16:38:11 Authoring application: Microsoft Excel First seen: 2023-10-25
MD5: 2a569bbcd9ca24bc623c73665bebd2a8 SHA-1: 369dd69caa7bad48d11e259c0ad6028a0295dafa SHA-256: f70e4d87583963ca1773f2902d75543804133854207e21b5c2ad07d4dd002e96
198 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The sample is an Excel file containing VBA macros, specifically a Workbook_Open macro that utilizes the Shell() function. The document body presents a fake eTDS utility and explicitly instructs the user to enable macros, indicating a lure for malicious execution. The macro creates a directory 'c:\etds-mta' and attempts to open an update, suggesting it downloads and executes a second-stage payload from one of the embedded URLs.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 https://downloads.stacos.com/TDS/TDS_Webpage/chat.html
    • https://downloads.stacos.com/TDS/TDS_Webpage/tdsxl.html
    • http://www.stacos.com/product_index.php?id=38
    • https://script.google.com/macros/s/AKfycbzTXgzvzdbH0wSFPv5C92J2qzywYLUAY9SE0pYW-whbicSrlLDe/exec?tan_name=

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d8862ee4900cfc848c9a6c6e115cd343dd7c550b524eee939781b5324afb64d8		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1024512 bytes

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