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

Static analysis result for SHA-256 bdec917c1d1afb51…

MALICIOUS

Office (OLE) / .DOCX

291.5 KB Created: 2020-12-02 08:03:00 Authoring application: Microsoft Office Word
MD5: 729e4f2eb2b053c2cb180b9f8a7e8eb2 SHA-1: cae4445c3fea1206b565eb8f273f661ad41906a1 SHA-256: bdec917c1d1afb5176c69d1d7c17b549062967f90aba97cc34f378c158a928c0
228 Risk Score

Malware Insights

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

The sample is a malicious DOCX file containing VBA macros. The 'Document_Open' macro is present and uses 'GetObject' and 'Environ' calls, along with string obfuscation, indicating it is designed to execute code. The presence of multiple unknown URLs suggests these are likely download locations for a secondary payload. The macros likely download and execute a second-stage payload from one of the embedded URLs.

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 http://1023.node3.isx.dk/wp-includes/js/jquery/ui/FJySGmscIlZP.php
    • http://pralserwis.hts-targatz.de/js/kcfinder/themes/dark/36AbZeYcEWke4xj.php
    • https://sapunuri.samargelim.ro/phpThumb/new_cache/4/40/gMnzaQ7Ge.php
    • https://vipchainresort.com/tgDqb07X2dj3r.php
    • https://buy.manairge.com/img/news/video/yoKHoSxL8p1.php
    • https://immobiliere-monio.com/cms/lib/Slim/Exception/6vywr0yn.php
    • https://helden-fuers-herz.de/wp-content/uploads/2020/01/u0ACBqT2Uy.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
16b8099b08aea0ce887592001e89e70905ce74fb5a46130c78561d317382adaa		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20655 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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