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

Static analysis result for SHA-256 3ea8860de83f1fa9…

MALICIOUS

Office (OLE) / .XLS

24.0 KB
MD5: 5397797af731d9b8ae090d270930ecb5 SHA-1: f009124a2aabb3630f7b51c9779bf6068ef2466f SHA-256: 3ea8860de83f1fa91105200c4e04e64ddac3ab9ffaa48a6c641c0b51121f3f69
348 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The Workbook_Open macro fires upon opening the XLS file, triggering the execution of VBA code. This code utilizes WScript.Shell and CreateObject to likely download and execute a second-stage payload from the provided Dropbox URL. The presence of Shell() and WScript.Shell usage strongly indicates a downloader or droppper functionality.

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
76dfd792cc8ea6005bc5ecfba5ca592f02a28618bdf800e6a5e43d9435eee36c		 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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