Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d0db7e664316d591…

MALICIOUS

Office (OLE)

580.0 KB Created: 1997-01-08 22:48:59 Authoring application: Microsoft Excel
MD5: 45ccc0ad606f700db70b826d0d5f19b9 SHA-1: 870190b4b2777c5c905599132a3b50f5252dd860 SHA-256: d0db7e664316d5912cd522ae3441e342207d9ff0775306f60fda297e8408ae33
340 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1059.005 Visual Basic

The sample contains VBA macros that trigger on Workbook_Open, indicative of a malicious document. Critical heuristics indicate the use of WScript.Shell and the Shell() function, suggesting the macro attempts to download and execute a second-stage payload. The embedded URLs are likely part of this delivery mechanism. The document body text appears to be a lure related to photo album software, possibly to disguise the malicious intent.

Heuristics 9

  • 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
  • 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 http://kokuo.com/neobuy.htm
    • http://kokuo.com/
    • http://kokuo.com/���������t�@���\�t�g��
    • http://kokuo.com/A@l
    • http://kokuo.com/neotoiawase.htm
    • http://www.vector.co.jp/download/file/win95/business/ff380357.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
17a8fc6dfff54fadd13c9d407a2dc32d24df2b1e64ecb15156ffaf1171d0b040		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 104475 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 8 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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