Emotet Office (OLE) / .DOCX malware analysis — malicious · a3e5bc01a70b2dda

MALICIOUS

Office (OLE) / .DOCX

169.8 KB Created: 2020-07-31 13:12:00 Authoring application: Microsoft Office Word

MD5: 122d15847141c5d986447f559d20d440 SHA-1: 8e002fa4bc3f114ef84a12226e138b7f0a3f4bfa SHA-256: a3e5bc01a70b2dda963a92054adb9691644700c7279aab9386e2d7632b43d5a8

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample contains VBA macros, specifically a Document_Open macro that utilizes a hidden UserForm as a command stager. This technique, combined with the CreateObject call and the critical heuristic firing for a VBA UserForm hidden-property command stager, strongly suggests the execution of a second-stage payload. The ClamAV detection explicitly names this as Emotet, a known banking trojan family.

Heuristics 8

VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER

VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
ClamAV: Doc.Malware.Emotet-9246065-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-9246065-1
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject 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
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://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `030a2bf7a84edfc041a3909cb1200ef5822b3ebab62942dd2c87da5fc0661bbe`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5031 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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