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

Static analysis result for SHA-256 f970630a41a2e8fe…

MALICIOUS

Office (OLE) / .DOCX

1.08 MB Created: 2021-05-17 17:49:00 Authoring application: Microsoft Office Word
MD5: ca09b19b6975e090fb4eda6ced1847b1 SHA-1: a7a2f5f7a70dab85f6ee173b9cde4507ed723ac5 SHA-256: f970630a41a2e8fe61fa3f2cf69dff87ac3fb272d006d6af866ca17264b14ff3
342 Risk Score

Malware Insights

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

The document contains a "Document_Open" VBA macro that utilizes WScript.Shell and CreateObject, indicating it attempts to execute commands or scripts. The "macros.bas" file is identified as a VBA macro. The document body explicitly instructs the user to "ACTIVER CONTENU" (enable content), which is a common lure for macro-based malware delivery. The macro likely downloads and executes a second-stage payload.

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
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_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 — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
    URL https://github.com/krijnsent/crypto_vba
    • https://github.com/BitMEX/api-connectors/tree/master/official-http/vba
    • https://github.com/binance-exchange/binance-official-api-docs/blob/master/rest-api.md
    • http://allenbrowne.com/bug-16.html
    • http://www.rondebruin.nl/win/s1/outlook/saveatt.htm
    • https://excel-malin.com
    • http://schemas.openxmlformats.org/drawingml/2006/main
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliography
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml
    • https://www.bitmex.com/app/restAPI
    • https://www.bitmex.com/api/explorer/
    • https://docs.bitfinex.com/docs/rest-auth
    • https://docs.bitvavo.com/
    • https://api.bittrex.com
    • https://api.bittrex.com/v3/
    • https://bittrex.com/home/api
    • https://bittrex.github.io/api/v3
    • https://www.bitmex.com/api/explorer/D
    • https://www.bitmex.com/api/explorer/.Add�
    • https://www.bitmex.com/api/explorer/ult
    • https://www.bitmex.com/api/explorer/ET
    • https://www.bitmex.com/api/explorer/i
    • https://www.bitmex.com/api/explorer/n
    • https://www.bitmex.com/api/explorer/a
    • https://www.bitmex.com/api/explorer/�����

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
b64f7ffff251106bf645e8b5410e820cafbf958342af133bcbf48ded6f9bf718		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1813072 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 shell/COM execution token(s). Carved artifact contains 212 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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