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

Static analysis result for SHA-256 be86d22f93fbcd77…

MALICIOUS

Office (OLE) / .XLS

137.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 73632d714d112d8b4142ff33b807cbe9 SHA-1: 22db42616d61d26baf0192720006355b126ee804 SHA-256: be86d22f93fbcd772b79861d1b63099f2ec998c1a4dcdba7bb32178f86014850
182 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1071.001 Web Protocols

The presence of Auto_Open and Auto_Close macros, along with a call to URLDownloadToFile, strongly indicates a malicious intent to download and execute a payload. The VBA script, though truncated, contains elements suggesting it attempts to hide its activity by manipulating sheet visibility and font colors. The embedded URLs are the most likely sources for the second-stage payload.

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).