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

Static analysis result for SHA-256 82c2678592f14cd5…

MALICIOUS

Office (OLE) / .XLS

625.0 KB Created: 2021-05-26 12:21:25 Authoring application: Microsoft Excel
MD5: 4ffb8596cc4e53cb6d7b5bcacd9ca1b6 SHA-1: 287aef4b18cc445e4cc4317ade27d7acd4b6c940 SHA-256: 82c2678592f14cd591040779dc315bf03f6b74e302db70419ad5054863a66007
370 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The sample is a malicious Excel file containing an obfuscated Workbook_Open VBA macro. This macro is designed to download and execute a second-stage payload from one of the embedded URLs, likely leading to further system compromise. The use of CreateObject and Shell() calls within the VBA code strongly indicates malicious intent.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • 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.
  • 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://���~�6���+�-�xcV
    • https://canaveral.tours/wRcTitz/p-content/plugins/birchschedule/inclRcTitz/udes/model/RcTitz/nCSJLYvvGRcTitz/Jw.php
    • https://adegt.com/wp-includes/so����A��)�=�
    • https://aspi$rv9Pr
    • https://labrie-\SzI-sabette.com/wp-includes/sodium_compat/namesp-\SzIaced/Core/ChaCha20/gp5yHrBp.php
    • https://ootashop.Gk#p=com/Gk#p=catalog/language/ar/extension/captcha/Iz4Gk#p=0CaCFxGk#p=.php
    • https://surustore.com/image/cache/catalog/demo/banners/h0dD8T2aNRz.phR:s6n.p
    • https://adegt.com/wp-includes/sodium_compat/namespaced/=e&+7)Core/ChaCha20/eDKgoiZov82FT.php
    • https://Abidshakir.co.uk/wp-content/plugins/elementor/inx)87D0cludes/admin-templates/22VemIrdTrquwKE.php

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
3250f571ea985f5b22bcdedd7af6adc7f296108cb17652ad70f08e09b6314c13		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 139944 bytes

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