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

Static analysis result for SHA-256 db0d848a42717254…

MALICIOUS

Office (OLE) / .XLS

44.0 KB Created: 2020-03-27 14:51:35 Authoring application: Microsoft Excel
MD5: 1b705f241854836334e00b814797fa10 SHA-1: 5d21e603a97c9f42784e69559848983cf1570510 SHA-256: db0d848a4271725425ffc943ea549173cd84d7b408da89892ff2fad3876f9a0c
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The file is an Excel spreadsheet containing a Workbook_Open VBA macro. This macro is designed to execute a payload by calling CreateObject and accessing the embedded URL 'https://192.168.1.1'. The presence of the Workbook_Open macro and the CreateObject call strongly indicate a malicious dropper functionality. The ClamAV detection name 'Xls.Dropper.Agent-7641096-0' further supports this assessment.

Heuristics 7

  • ClamAV: Xls.Dropper.Agent-7641096-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7641096-0
  • 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 https://192.168.1.1

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1b696dcf80368eeaf8d7bfd33291683fab5f3cd2567ed4fb5f6e991fe68f054f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13211 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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