Office (OOXML) / .XLSM malware analysis — malicious · b6b6eb4c3e244e24

MALICIOUS

Office (OOXML) / .XLSM

298.5 KB Created: 2021-04-14 15:44:18 UTC Authoring application: Microsoft Excel 15.0300

MD5: 86a64ae3da7702b0759c2d265a193188 SHA-1: 473b95b1ae2302ad3ee45cce76afbe6702dd5c46 SHA-256: b6b6eb4c3e244e24fa003c83d6e9cee1b90c5687ea5067db21f341a4093924ad

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.002 Spearphishing Attachment

The sample is an XLSM file containing a Workbook_Open macro, indicating automatic execution upon opening. The macro uses CreateObject and Environ calls, suggesting it attempts to interact with the system or environment. The document body contains obfuscated text and URLs, likely intended to disguise the malicious payload and lure the user into interacting with the document. The presence of VBA macros and the Workbook_Open event strongly suggests the macro is designed to download and execute a second-stage payload from one of the listed URLs.

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://api.magicalabs.com/hHVaGPuBT9dSxh.php
- https://oremoralesabogados.com.pe/Scripts/WqPCodwcgmkqSZ.php
- https://safraprime.com.br/img/portfolio/full/7CjadBxFsuro.php
- https://rutasmovil.mx/bar/lib/datatables/Buttons-1.2.2/css/X1hUY4rqtmPDv1O.php
- https://host-per.com/chologringo/images/vfZoPyJUw.php
- https://draniruddhaghosh.co.in/5sB1De5W5iC96y2.php
- https://erlima.com/userfiles/_thumbs/Images/_vti_cnf/3dlbKnTC.php
- https://razapparelsbd.com/ima/wp-content/uploads/2021/01/StSke0U0.php
- https://rewardunlimited.us/tr3O9zb4o5ptybB.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `f4cbe8b1a19566752e6839bedffaa8cfea12d1289d7d463ffafe0bbb329269ee`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	68603 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 38 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `1be653d500c26bd495b36251c8de80a1a620d32c33f9d67d4be27beb982e8a40`	vba-project	OOXML VBA project: xl/vbaProject.bin	204800 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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