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

Static analysis result for SHA-256 b76b82266c242b96…

MALICIOUS

Office (OLE) / .XLS

24.0 KB
MD5: 1730aa534e19fea2f13e5c20e58ef8e9 SHA-1: 49f09ead4b3421a9d8584f6b107edc2f82ab7959 SHA-256: b76b82266c242b9675b00c2396fe2a3926831495639802863ed858723b19e1b5
348 Risk Score

Malware Insights

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

The Workbook_Open macro is automatically executed upon opening the Excel file. This macro utilizes WScript.Shell to execute commands, indicating a likely downloader or dropper functionality. The presence of WScript.Shell and Shell() calls strongly suggests the execution of arbitrary code. No specific family could be identified due to the generic nature of the observed techniques.

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
9288f7828b8671e0f81cc0c7d0419bebb55718fee38d257778894ce5f4167236		 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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