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

Static analysis result for SHA-256 7465c92fd37c827a…

MALICIOUS

Office (OLE) / .XLSX

142.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: bcd1f186303d5fc799762b3e2819f0e9 SHA-1: 960ee0c2995f1e92e1ccf9f4c0e032491cf76dee SHA-256: 7465c92fd37c827a6ed5b6f4a8aceb50b78e200225bfe878eaae7f8dba2221c3
302 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer

The sample contains VBA macros that are automatically executed upon opening the workbook, as indicated by the Workbook_Open heuristic. These macros utilize CreateObject to interact with the system, specifically referencing Wscript.Shell and Scripting.FileSystemObject to create and execute batch and VBScript files. The embedded URLs are reconstructed from VBA cell-staged data and are used to download a second-stage payload, aligning with the Ingress Tool Transfer technique. The presence of multiple URLs suggests a fallback mechanism for payload delivery.

Heuristics 8

  • URL reconstructed from VBA cell-staged base64 dropper (11 URLs) critical OLE_VBA_CELL_DROPPER_URL
    VBA reads worksheet cells, strips junk substrings via Replace(), and base64/UTF-16 decodes the result into a PowerShell EncodedCommand payload. The download URL is never contiguous in the file bytes; it was recovered by removing the macro's Replace() junk tokens from the cell strings and decoding the staged base64.
  • ClamAV: Doc.Malware.Valyria-10004384-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-10004384-0
  • 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.
  • 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://goyaluat.vmesh.in/0v6kcny/CG/
    • https://mars.srl/wp-admin/7Ffk6LLN2Xs2W/
    • http://franmulero.es/mbx/8c5RBJx6/
    • http://varafood.com/Ajax/cnM91G/
    • https://7jcat.com/wp-content/t/
    • http://blog.centralhome.h
    • http://zimrights.co.zw/oldsite/k0EoCWycU9tNo1d/
    • https://mudhands.com/error/BfH/
    • http://albatrospatagonia.com/phkcvt/t53ceSMDqgPQlq/
    • http://mapcommunications.co.zw/wp-admin/mdRRbSdU3aB7Xpx6z/
    • http://dushkin.net/img/bhQSTNicEMtNQxP/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
527d0656a0c2c323955d068683ef8f7e20c035cda247a1e24383595c0eb3403b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 7821 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.