Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 e9e0a2d27876dc9e…

MALICIOUS

Office (OLE) / .XLS

778.0 KB Created: 2021-01-13 13:52:30 Authoring application: Microsoft Excel
MD5: 955ddd57164c95530bbff3d5481c0cde SHA-1: 38449ef5a84f657d39228df55586fa13cab8d9f1 SHA-256: e9e0a2d27876dc9e0fb5e4a9675a23be3f1a8651f72d5774db0e34c0418fcbf8
288 Risk Score

Malware Insights

Dridex · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is identified as a Dridex dropper by ClamAV. It contains VBA macros, including a Workbook_Open auto-execution routine that uses GetObject and Environ calls, indicative of malicious intent. The script likely downloads and executes a second-stage payload from one of the embedded URLs.

Heuristics 9

  • 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
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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.
  • 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 macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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 http://kurdcoding.com/RokUoZsNpAt8mc.php
    • https://www.cutandscrew.com/css/images/icons/light/dark/bwvTFSxdRMx8u.php
    • https://easyweber.net/layouts/layout1/wp-includes/Requests/Auth/BTjT6wKTxx0.php
    • https://yogiramsuratkumar.com/album/res/contentflow/img/r7QOWIwYj5.php
    • http://omjeemart.com/ksbmadmin/source/vendor/phpunit/php-code-coverage/Y8z6bnvahXwNw.php
    • http://hedgelong.com/NJm75ajGNU.php
    • https://plomberielafleur.com/wp-content/plugins/js_composer/config/buttons/yhNkVgbHfkia6f.php
    • https://wellnessway.co.za/wp-content/plugins/coming-soon-maintenance-mode-from-acurax/css/fonts/vSoOsa1e.php
    • http://sefinancer.fr/wp-content/themes/twentynineteen/sass/blocks/SlyOzj2S7kfU8q.php
    • http://appliedlogisticalconcepts.com/wp-content/plugins/rounding-master/demo-importer/demo/MRbjhZoUav.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
f30bbdce8ef9fd8cf86170290322ac150d2b9f24e84e7bc3d17ff328a2af53c0		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 50503 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 125 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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