Dridex — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 dc83d7ef3d92a8b2…

MALICIOUS

Office (OOXML) / .XLSM

69.6 KB Created: 2021-04-28 11:54:10 UTC Authoring application: Microsoft Excel 15.0300
MD5: 04d0a8ac0d7dc2e2cfd6163eaf741ae5 SHA-1: 23b39cf722bbb63a41042a8aa9f903ee3c336053 SHA-256: dc83d7ef3d92a8b215677225be8370870b4adc360e9f64a979c6f79acb185019
208 Risk Score

Malware Insights

Dridex · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1071.001 Web Protocols

The critical ClamAV heuristic and the presence of a Workbook_Open macro strongly indicate a downloader. The macro likely uses CreateObject to download and execute a second-stage payload from one of the numerous provided URLs. The document body contains a mix of numbers and URLs, further supporting the downloader functionality.

Heuristics 7

  • ClamAV: Xls.Downloader.DridexDarkGreen1020210-9905041-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.DridexDarkGreen1020210-9905041-0
  • 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://irontechnologycnc.ro/wp-content/themes/twentynineteen/sass/blocks/1ORgpmJIQwUoOJ.php
    • https://microconbio.com/wp-content/plugins/revslider/includes/InstagramScraper/dCZxP9cH.php
    • https://help.itkt.uk/inc/tiny_mce/5.4.2/skins/content/co28fzw9c07vS.php
    • https://luxtonace.com/luxton/plugins/ckeditor/plugins/a11yhelp/9Gysz7pXb.php
    • https://devfix.jogjaautoma.com/wp-content/plugins/mega-addons-for-visual-composer/css/font-awesome/4sjwP9yd.php
    • https://bmwkings.gr/wp-content/plugins/wordpress-seo-premium/classes/blocks/JlmAWNjxtG.php
    • https://test2.multiversidadglocal.org/availability/condition/group/yui/build/p0R6P2rEX.php
    • https://piruflex.com/wp-content/plugins/elementor/modules/admin-bar/YK6drJbl2.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
5cd1a9cb5c69313c8ebbd7ab02528f0a437c82e8ee727bea19773253736a648f		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 10114 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
d69f29313b1305f30afad60ae3c85d6f41ee4fd66fd37f1bc52c22234243eea4		 vba-project OOXML VBA project: xl/vbaProject.bin 53760 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.