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

Static analysis result for SHA-256 d605724b31d8627f…

MALICIOUS

Office (OLE) / .XLSX

611.0 KB Created: 2021-05-26 12:13:33 Authoring application: Microsoft Excel
MD5: 10a6370bb359ff9f3a595c3ad389222c SHA-1: 9f5d5664530652a46e06f0cfdcbbe2d2b0770dca SHA-256: d605724b31d8627ffbf203ec7d917cb70019e6c95d0c501a7136f7e2b72b79bb
270 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1140 Deobfuscate/Decode Files or Information

The sample contains VBA macros, specifically a Workbook_Open macro that uses CreateObject to execute code. This indicates an attempt to download and run a secondary payload from one of the embedded URLs. The presence of an appended OLE payload further supports this, suggesting a multi-stage infection process. The exact functionality of the script is not fully discernible due to potential obfuscation, but its primary intent appears to be payload delivery.

Heuristics 9

  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOAD
    OLE compound file contains a large high-entropy region beyond the declared major streams and that region includes shellcode, PE, or loader API markers. This is a payload-carrier signal, not a specific CVE attribution by itself.
  • 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
  • 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 — 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://kweraltd�h
    • https://AbidshakLkToldPir.co.uk/wp-content/plugins/elementor/includes/admin-templates/2LkToldP2VemIrdTrquwKE.php�
    • https://tSHSYOineoSHSYO.gal/wp-cSHSYOontent/plugins/wordpress-seo/vendor/compSHSYOoser/inSHSYOstSHSYOallers/tests/Composer/Installers/lSNBjeKdHn.php
    • https://kweraltd.com/wp-content/plugins/woocommerce-delivery-notes/includes/component/u.%Vtfx63R84hM.php
    • https://vitiy1j=
    • https://labrie-sabette.com/wp-includes/sodi6D/6y1um_compat/na6D/6y1mespaced/Core/ChaCha20/gp5yHrBp.php
    • https://menuis;Xy|
    • https://srivinaysalian.com/wp=K0#L-content/plugins/=K0#Lcatch-instagr=K0#Lam-feed-gallery-widget/public/css/jYfe4b9imB.php
    • https://AbidshakLkToldPir.co.uk/wp-content/plugins/elementor/includes/admin-templates/2LkToldP2VemIrdTrquwKE.php

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
8c21c36541f81ed500cd04c63924c0ad43cee3733af6edad7d4a646254481334		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 131472 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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