Dridex Office (OOXML) / .XLSM malware analysis — malicious · f4dcd21a2e0b2f44

MALICIOUS

Office (OOXML) / .XLSM

398.8 KB

MD5: 937aa5650aa985dd443f4a03156967c9 SHA-1: f40cd6481a66c1608a6b97580fe69f2e4904ed6d SHA-256: f4dcd21a2e0b2f4432b665157a1f934e5063be6bbf7ef5f92b365bbbeca92331

260 Risk Score

Malware Insights

Dridex · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is an XLSM document containing a Workbook_Open VBA macro, a common technique for initial execution. ClamAV detections identify it as a Dridex downloader/dropper. The macro likely uses CreateObject to download and execute a second-stage payload, as indicated by the 'OLE_VBA_CREATEOBJ' and 'OLE_VBA_WBOPEN' heuristics. The embedded artifact detections further support its role as a dropper.

Heuristics 6

ClamAV: Xls.Downloader.DridexGreen09213-9890103-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.DridexGreen09213-9890103-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `e2c5bafe68dc61f643e3f1dd21c84d4b260bebeb6b88af03a70346542feba6d9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	3741 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `2f1c2e0b28b414cbc6cdbef157cf9a5108721e2189d6d25e8b86914a695250de`	vba-project	OOXML VBA project: xl/vbaProject.bin	6144 bytes
Detection ClamAV: Xls.Dropper.EPPlus-9802867-2 Obfuscation or payload: unlikely

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