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

Static analysis result for SHA-256 dff5529765769f8c…

MALICIOUS

Office (OLE) / .XLS

386.0 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel
MD5: 5d96e20c22ec1d0e61ee08f7b1b619ca SHA-1: 6320224cf31961c93263dc836cf03688ad118531 SHA-256: dff5529765769f8c9881437dcce2ed3174ba9946fc4ae4897edac5460df3dd87
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file contains a Workbook_Open VBA macro, which is a common technique for executing malicious code upon opening the document. The macro uses CreateObject and references Windows Script Host, indicating it likely attempts to download and execute a second-stage payload from the provided URL. The presence of these indicators strongly suggests a downloader or droppper functionality.

Heuristics 7

  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://scaladevelopments.scaladevco.com/13Z/IMG_650_617_250.ex

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
5e307aa8356eb93ba6abc179bb8f99d747353230b88fc104e787abede5961b98		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1211 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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