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

Static analysis result for SHA-256 280efc48af2241a2…

MALICIOUS

Office (OLE) / .XLSX

137.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: be489c4415757ddcc6af1392c2f7bc92 SHA-1: 04f431e4f1f034fb2ba677afe969600ad214e69d SHA-256: 280efc48af2241a2e06a8d5a5c4a943296c42578bff354ca5e97f9c77193f239
182 Risk Score

Malware Insights

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

The sample is a macro-enabled Excel file containing Auto_Open and Auto_Close macros, indicating an attempt to automatically execute code upon opening or closing the document. The presence of the SC_STR_URLDOWNLOAD heuristic suggests the macro attempts to download content from the internet. The embedded URLs are likely used for this purpose. No specific malware family could be identified, but the behavior is consistent with a downloader.

Heuristics 6

  • Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD
    Reference to URLDownloadToFile API
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact medium 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.
  • 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://190.14.37.187/
    • http://94.140.112.126/
    • http://185.141.27.213/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
61c6032b99fa0ef978378e1be8c1b924c7ca668abf2d2a64e0173d522f207b34
vba-macro oletools.olevba.extract_macros (decoded VBA source) 3590 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 shell/COM execution token(s).