Office (OOXML) / .XLSM malware analysis — malicious · 460a50b7d37aaf6c

MALICIOUS

Office (OOXML) / .XLSM

303.0 KB Created: 2021-04-14 15:40:30 UTC Authoring application: Microsoft Excel 15.0300

MD5: 10848be17f4b49052deeb6df3c482e20 SHA-1: 65964d43e0f08f266c6f4eb04827bf04823d8992 SHA-256: 460a50b7d37aaf6c1964e54593333fd6118bc0f86e9316eca0e0cd37ea1ca94d

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.002 Spearphishing Attachment

This XLSM file contains a Workbook_Open macro that executes obfuscated VBA code. The script utilizes CreateObject and Environ calls, suggesting it attempts to download and execute a second-stage payload from one of the listed URLs. The presence of VBA Chr string obfuscation further supports this malicious intent.

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://matchlesstravels.com.pk/backup-12-2-2019/wp-admin/css/colors/blue/lT5C3R1Gcq.php
- https://vmarks.com.br/logo/4JjZdc5FwoxAdq8.php
- https://www.dutamasindo.id/template/plugins/bootstrap-submenu/dist/css/s83Po08eRHhSfD5.php
- https://shrishinfra.com/uc/css/zd1uT5UZFn1.php
- https://api.magicalabs.com/hHVaGPuBT9dSxh.php
- https://irishteenagers.com/themes/dolphin/images/icons/emoticons/WUwC8PuAk.php
- https://ziengineeringco.com/project-arab-contracting/css/dAHBzO4XG.php
- https://kanun.ml/lib/animate/LZ5qvMji5r.php
- https://host-per.com/chologringo/images/vfZoPyJUw.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `87a374ee3ffe52028a8e12767b00d222496770e3de3b7f2290a064820004ed1c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	71227 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 23 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `9790cd167e349ea56ccc5203f468c133bf718fc8d209faef5bb9eb12786910cc`	vba-project	OOXML VBA project: xl/vbaProject.bin	211968 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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