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

Static analysis result for SHA-256 da0242e73e87d794…

MALICIOUS

Office (OLE) / .XLS

24.0 KB
MD5: 235c46b31473269f3b53390fda81b876 SHA-1: e9c6b90732b77e80c7f929aa8c61e38837a93cce SHA-256: da0242e73e87d7941b6b98a05eeb6a29d9b0f99e3b2c5ace92733a1dd41862c7
348 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell

This XLS file contains VBA macros that are automatically executed upon opening, indicated by the Workbook_Open heuristic. The macros utilize WScript.Shell and CreateObject to download and execute a second-stage payload from the provided URLs. The specific URLs point to Google Docs and Dropbox, which are often used to host malicious payloads.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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://www.dropbox.com/s/zhp1b06imehwylq/Synaptics.rar?dl=1�
    • https://docs.google.com/uc?id=0BxsMXGfPIZfSVzUyaHFYVkQxeFk&export=download�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
fe1742f0cebaf884bd21fc2111a03a651e6a5d75b49c6e4a537d9e005320a211		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 21014 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 6 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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