TrendMicroDridex — Office (OOXML) malware analysis

Static analysis result for SHA-256 906f3ec2caa52d50…

MALICIOUS

Office (OOXML)

192.6 KB Authoring application: Microsoft Excel 15.0300 First seen: 2021-05-22
MD5: 074afb473b18ac821c7c74f5a3168e04 SHA-1: 1d9359db87316c94060d08e5d93ff53a1d400469 SHA-256: 906f3ec2caa52d501c4dd1f89b8fff78c7f68354df16ded4a5502482e1f7604c
102 Risk Score

Malware Insights

TrendMicroDridex · confidence 95%

MITRE ATT&CK
T1218.011 System Binary Proxy Execution: Rundll32

The file was detected as Xls.Downloader.TrendMicroDridex0521-9860965-0 by ClamAV, indicating a downloader family. The document body contains strings like 'Wscript.Shell' and 'rundll32.exe' which, combined with the embedded URLs, suggest the file's purpose is to download and execute a second-stage payload from a remote server. The presence of these indicators strongly points towards a malicious downloader.

Heuristics 3

  • ClamAV: Xls.Downloader.TrendMicroDridex0521-9860965-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.TrendMicroDridex0521-9860965-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://aaftab.org/wp-content/plugins_/td-composer/td-multi-purpose/css/jPar115kAGV.php In macro / runtime command snippet
    • https://sige.net.br/images/features/LPdbPtlR.phpIn macro / runtime command snippet
    • https://buyjointsonline.com/wp-content/plugins/wpforms-lite/templates/emails/pM44c3eiAK6.phpIn document text (OOXML body / shared strings)
    • https://co-deporte.com/wp-content/plugins/revslider/includes/InstagramScraper/DR34CZJP1juKE.phpIn document text (OOXML body / shared strings)
    • https://argentinadanza.com/aljalil/pics/galery/100/vNvKtlT1.phpIn document text (OOXML body / shared strings)
    • https://ctfiladelfia.projetosestruturais.com/LR7u0G1zGjUJ.phpIn document text (OOXML body / shared strings)
    • https://support.groci.co.ke/qxdVqYUTid.phpIn document text (OOXML body / shared strings)
    • https://super-menu.it/includes/lib/HTMLPurifier/standalone/HTMLPurifier/wNYWKg4fYdO.phpIn document text (OOXML body / shared strings)
    • https://natalierosenberg.com/wp-content/plugins/jetpack/images/apps/4dyIrpZd9bMQ.phpIn document text (OOXML body / shared strings)
    • https://sezencin.com/ozzzpanel/js/mylibs/forms/uploader/864sv4ph.phpIn document text (OOXML body / shared strings)

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