Office (OOXML) / .XLSM malware analysis — malicious · 578c01870c999238

MALICIOUS

Office (OOXML) / .XLSM

297.8 KB Created: 2021-04-19 14:37:44 UTC Authoring application: Microsoft Excel 15.0300

MD5: 85894dab57947ca3d40417e90c38233c SHA-1: 91eb924305eaaddfcec146b4acce2f2fad43e9bd SHA-256: 578c01870c99923807b8207bdbfa93a31ee6891807a441756f56290a750dbe3d

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is an XLSM file containing a Workbook_Open macro, indicating it's designed to execute code upon opening. The macro uses CreateObject and Environ calls, suggesting it attempts to interact with the system environment and potentially download or execute further payloads. The obfuscated document body text, combined with the presence of VBA macros, points towards a malicious document designed to trick the user into enabling macro execution for a secondary download or execution stage.

Heuristics 6

Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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 project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present
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://babashofi.com/wp-content/themes/twentytwentyone/template-parts/content/gmWSOnVh.php
- https://gamerspace.in/apps/default/notactive/templates/notactive/NFhoJvZ3AFDIvIz.php
- https://nuevo.redpresidencialdetransporte.com/porto/wp-includes/SimplePie/XML/Declaration/9yhCFVef2im0.php
- https://hospitalityservicesinasia.com/wp-content/plugins/meta-box/js/jqueryui/cIE3gaI2XZAJvN5.php
- https://online-ce.org/moodle/favourites/classes/local/entity/XacKtNeOe.php
- https://mississippiteenagers.net/themes/dolphin/images/icons/emoticons/tdmmb2QVDADetz.php
- https://dramawuxia.xyz/wp-includes/sodium_compat/src/Core/Base64/390DRtAhn.php
- https://mesura.net/wp-content/cache/object/40e/8b0/1QCcc2ZUmrF0NlA.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `135f1cf557303c52cea661d511e05a517d1889daa164e31ccacc6d20fdc642f5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	82042 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 24 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `eceb0288f43e41e83160be12dbd089e7fab0131556a6675236fc5a5a6a6e8c0e`	vba-project	OOXML VBA project: xl/vbaProject.bin	247808 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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