Malicious Office (OOXML) / .XLSM — malware analysis report

Static analysis result for SHA-256 daf1cab38e057884…

MALICIOUS

Office (OOXML) / .XLSM

2.83 MB Created: 2021-05-06 15:09:17 UTC Authoring application: Microsoft Excel 15.0300
MD5: d254249d100e32e98e9fe99fd3bfff8e SHA-1: 689bfa35baedfea7e3ed343b99eb229086ce9c7c SHA-256: daf1cab38e057884e5fd2e7e4b372c8b24d24a21641b43ff176feed473e05b22
248 Risk Score

Malware Insights

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

The presence of a Workbook_Open macro, CreateObject calls, and visible LOLBin execution instructions strongly indicate malicious intent. The macro is designed to download and execute a second-stage payload from one of the provided URLs. The ClamAV detection as Xls.Downloader.TrendMicroDridex0521-9860965-0 further supports this assessment.

Heuristics 8

  • ClamAV: Xls.Downloader.TrendMicroDridex0521-9860965-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.TrendMicroDridex0521-9860965-0
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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://touchuphouse.com/wp-content/plugins/wp-file-manager/inc/images/VsMQ4PexH.php
    • https://bhuttangill.com/wp-includes/js/tinymce/themes/inlite/Agk5yxu6D3SEW.php
    • https://senalgrafsac.com/prueba/vendor/bootstrap/css/Z1Oeq1XQhEC.php
    • https://grupoakrabu.com/img/galeria/paEAehZhSWNmH.php
    • https://kpleads.com/kpleads.ali/wp/wp-includes/js/codemirror/njNvuZ7MIDRL.php
    • https://hamdanigroupofcompanies.com/wp-content/plugins/case-theme-import/includes/api/e1KqWCgL.php
    • https://tafaghodi.ir/resume/files/EHEtRsJyIPR6o75.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
934e00fc69d54e61b89a7465a34e0e8175e4da97787873aabb3f548799c4aeb1		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1965707 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
93895604d6e020c40dfed1b1d6cafcbe942a3d31a01e1ce698db6ad5b4498043		 vba-project OOXML VBA project: xl/vbaProject.bin 4008960 bytes

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