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

Static analysis result for SHA-256 1e993ef7ee5f21b9…

MALICIOUS

Office (OLE) / .XLSX

222.5 KB Created: 2000-04-13 21:48:14 Authoring application: Microsoft Excel
MD5: c64202fc6e89fc1c49cde536894ed99d SHA-1: 23910d0cc03cfef9acd0cf08b0f19852e7d10c87 SHA-256: 1e993ef7ee5f21b9f815ebf853b0bd40d3328a1bd6d680ffc3ace55e4bf73a89
338 Risk Score

Malware Insights

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

The file contains a Workbook_Open VBA macro that utilizes WScript.Shell to execute commands. This macro is designed to download and execute a second-stage payload from one of the numerous embedded URLs. The presence of an appended payload and the nature of the macro strongly indicate a downloader or droppper functionality.

Heuristics 11

  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 227,840 bytes but its declared streams total only 111,991 bytes — 115,849 bytes (51%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • 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)
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://monarchmedical.co.uk/ven�Vt���
    • https://es.e-m2.n�
    • https://santorinitr�������}A
    • https://ahd|d5%lYm|d5%lYspor|d5%lYt.com/boots|P
    • https://monarchmedical.co.uk/vendor/bootstrap/css/xrKVZy8sh5ri.phpp0BH;VN-Gk
    • https://courieradmU
    • https://t$7%So)Weste.sitiodoastronauta.com.br/wp-includes/js/tinymce/plugins/charmap/M19jooPri8Tq.php
    • https://es.e-m2.net/wp-includes/js/tinymce/themes/inlite/8S7qnln7.phpe9(wSz|7=@7Qp4
    • https://dev1.whoatemylunch.org/wpjL02,-includes/js/tinymce/themes/inlite/hxXjL02,jL02,HK0N6.php
    • https://santorinitravel.naturalgraphic.hu/wp-content/plugins/cookie-law-info/public/css/l5e7I9bjYqmEQ.php/b&wtz&_UaC1BgqK
    • https://adamjeecommodities.com/wp-content/themes/adamjeecom/inc/options/kUQIZCFicsJ.phpamzj1iLrO
    • https://ahd|d5%lYm|d5%lYspor|d5%lYt.com/boots|d5%lYtrap/scripts/_notes/Xwi4K0Brmw|d5%lYX6|d5%lYhf.php

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
479dbb7b8325faa2916f680f7a1935a7c0fa29e1d7d30f139b2ca647e4d757ce
vba-macro oletools.olevba.extract_macros (decoded VBA source) 15559 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.