Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 bc3aa47a1952772e…

MALICIOUS

Office (OLE)

123.5 KB Created: 2020-03-10 13:26:00 Authoring application: Microsoft Office Word
MD5: 42ec4d5a64c7b09db619acc7a6a6401b SHA-1: ab8a8e7b844ca00d1c92703fdebe41af01cd4f76 SHA-256: bc3aa47a1952772ec8bdab6befafa5d844fccdcb32a1c8bac250e2afa0958cba
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.005 Visual Basic

The file is detected as a downloader by ClamAV. The document body presents a fake court filing form and explicitly instructs the user to enable macros to obtain information, which is a common lure. The presence of a Document_Open macro that calls GetObject indicates the execution of malicious VBA code upon opening the document, likely to download and execute a second-stage payload. The embedded URL to www.firstlegal.com is likely part of the lure or a command and control channel.

Heuristics 8

  • ClamAV: Xls.Downloader.Generic-7615972-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Generic-7615972-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Suspicious extracted artifact info 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.
  • 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://www.firstlegal.com
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6aa025ba01448264b07e32f439e7368986f211ca755b9687ea1401e1ce50d2c3		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2879 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 long base64-like blob(s).

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