Office (OOXML) / .XLSX malware analysis — malicious · ce0f03fcee0d0cdd

MALICIOUS

Office (OOXML) / .XLSX

164.4 KB Created: 2021-04-21 13:19:38 UTC Authoring application: Microsoft Excel 15.0300

MD5: 0d078f062bf55f9731c74ad03c8b7e7d SHA-1: efc993ad607de2d59e58821f8b762e7c89a7acb9 SHA-256: ce0f03fcee0d0cddba35b3053ea5d24ba14ed57d8112a508546fe4d3d9d3c0e2

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample is an Excel spreadsheet containing a Workbook_Open macro. This macro uses CreateObject to likely download and execute a second-stage payload from one of the provided URLs. The Environ() call suggests it may also be attempting to gather system information. The presence of a Workbook_Open macro and CreateObject calls strongly indicates 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://prodigitalize.com/RTg3Z9Jy.php
- https://successnoregrets.com/__MACOSX/img/VpfxnXS5mMt7.php
- https://promocionessostenibles.es/wp-content/plugins/meta-box/css/jqueryui/EAMqn8EBm.php
- https://jbbackgrounds.com/library-aquarium-backgrounds/jb/full/uYE01HW3oO.php
- https://sweetpapas.com/wp-content/plugins/really-simple-ssl/testssl/cloudflare/XGeXzH8b.php
- https://sisprofamilia.sistemasvip.com.br/profmobile/vendor/doctrine/collections/docs/E6owcrdAVifHpML.php
- https://bestel.hallomaasland.be/css/icons/weather-icons/sass/icon-classes/3HpGEmSu0.php
- https://estakada-team.com/wp-includes/sodium_compat/namespaced/Core/ChaCha20/QAQGF2L95ZrSQVC.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `0aee16584355c03bf5be22941721d46f151a7e09ebcacff4c46d2e2660f94a1e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	9109 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `0df2df272edf0a907af706e1fe126e3c522b9d732ff86294d2c8d665b2c480d6`	vba-project	OOXML VBA project: xl/vbaProject.bin	52736 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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