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

Static analysis result for SHA-256 f79c33cec07eaa6b…

MALICIOUS

Office (OLE) / .DOC

314.5 KB Created: 2020-12-02 14:20:00 Authoring application: Microsoft Office Word
MD5: d1c0740f8908d885db81b23d8f1faf01 SHA-1: 9e7c315648ea25012fd24cbaad1d113cf8f199b4 SHA-256: f79c33cec07eaa6b3f44e09ed43e87c351b796df1f1dbdc346b58c0e822aa717
228 Risk Score

Malware Insights

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

The sample contains a Document_Open VBA macro that utilizes GetObject and WScript references, indicating it's designed to execute code. The macro likely downloads and executes a second-stage payload from one of the embedded URLs. The presence of obfuscated VBA code and multiple unknown reputation URLs supports this assessment.

Heuristics 8

  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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.
  • 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://vipchainresort.com/tgDqb07X2dj3r.php
    • https://buy.manairge.com/img/news/video/yoKHoSxL8p1.php
    • https://helden-fuers-herz.de/wp-content/uploads/2020/01/u0ACBqT2Uy.php
    • https://immobiliere-monio.com/cms/lib/Slim/Exception/6vywr0yn.php
    • https://sapunuri.samargelim.ro/phpThumb/new_cache/4/40/gMnzaQ7Ge.php
    • http://pralserwis.hts-targatz.de/js/kcfinder/themes/dark/36AbZeYcEWke4xj.php
    • http://1023.node3.isx.dk/wp-includes/js/jquery/ui/FJySGmscIlZP.php
    • http://schemas.openxmlformats.org/drawingml/2006/main
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
dbf655cf7451729744a12fdcf1fb58fbb4775402db1e88cda3c74b23b8259ac2		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 22468 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 125 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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