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

Static analysis result for SHA-256 e8b97a64615d4a44…

MALICIOUS

Office (OLE) / .BIN

839.5 KB
MD5: 9ab510a8b389ae5d9a277594a0cbbe92 SHA-1: c80851325fe7d478644ce354b83d339f04e27145 SHA-256: e8b97a64615d4a449764b2004bb14100571964a0e7ead5fd2637f99e4a0d23fa
440 Risk Score

Malware Insights

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

The sample contains a Workbook_Open macro that utilizes WScript.Shell and CreateObject to execute obfuscated VBA code. This code is designed to download and execute a second-stage payload from an embedded URL, as indicated by the 'OLE_VBA_OBFUSCATED_SHELL_URL' heuristic. The presence of 'macros.bas' suggests a VBA macro-based downloader. The specific URL could not be reconstructed due to obfuscation.

Heuristics 11

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
  • 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
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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://na1.salesforce.com/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
bc8fe001556250311c35148c111316b7ba8de63bcea21421b0cbc65831b539b2		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 313953 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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