Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 a835f5cc185fc0b8…

MALICIOUS

Office (OLE) / .XLS

812.0 KB Created: 2021-01-13 15:40:19 Authoring application: Microsoft Excel
MD5: 84fa3d091bb36f07ca0c19428e5f99dd SHA-1: 669d5c56180c8d9d22012eabb157330e8f081346 SHA-256: a835f5cc185fc0b87a513e16373210367f05ba7c189f20f9030908be6c69ebb0
142 Risk Score

Malware Insights

Dridex · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell

The ClamAV detection and the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic strongly indicate a Dridex dropper. The presence of a 'SC_STR_WSCRIPT' reference suggests the use of Windows Script Host, likely to download and execute a second-stage payload from one of the numerous unknown-reputation URLs found within the document. The VBA macros could not be extracted, but the other indicators are sufficient for a high-confidence assessment.

Heuristics 5

  • ClamAV: Doc.Dropper.Dridex-9845759-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Dridex-9845759-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Unsupported Office format for VBA extraction info OFFICE_FORMAT_UNSUPPORTED
    olevba could not extract VBA macros (AssertionError); format-agnostic byte-level scans still ran. Likely legacy, encrypted, or malformed OLE/OOXML — re-scanning the same bytes will yield the same outcome.
  • 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://impulsionfood.com/wp-content/plugins/updraftplus/css/tether-shepherd/ipaO64BN.php
    • https://yogiramsuratkumar.com/album/res/contentflow/img/r7QOWIwYj5.php
    • https://www.blackoutthebox.com/wp-content/plugins/woocommerce/src/Admin/NsWEtEuMIGClJnM.php
    • http://pidebh.com/wp-content/plugins/woocommerce/src/Admin/ldaoxOBdp.php
    • https://www.cutandscrew.com/css/images/icons/light/dark/bwvTFSxdRMx8u.php
    • http://usmartnet.co.uk/wp-content/themes/twentyseventeen/template-parts/footer/pODsiHRo.php
    • http://hedgelong.com/NJm75ajGNU.php
    • https://www.testsurver.nl/everything/wp-content/uploads/2020/01/zuUDqJvjLWS.php
    • http://go7wallet.com/app/plugins/cordova-plugin-statusbar/src/browser/HLn3obcR1vMJZNt.php
    • http://alarmascancun.com.mx/wp-content/themes/vw-security-guard/template-parts/header/dvhW3tqNnyOlf.php
    • http://www.w3.org/1999/XSL/Transform

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