Office (OLE) / .DOCX malware analysis — suspicious · 7d1fbe79df80ed44

SUSPICIOUS

Office (OLE) / .DOCX

1.85 MB Created: 2024-05-22 11:01:00 Authoring application: Microsoft Office Word

MD5: 5d36d4da71eb9a3b04917c4e197e6c5a SHA-1: 88fa956d021807c5fc9d0e71d5410ea7e0a4ca91 SHA-256: 7d1fbe79df80ed442093510023b383c42749c4a689c1590f2d288402392e58e0

40 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer T1566.001 Spearphishing Attachment

The sample contains a high-confidence AutoOpen VBA macro that utilizes CreateObject to execute code. The macro attempts to write a file named 'auxiliary2.aux' to the temporary directory and then calls a function from it, indicating it's designed to download and execute a second-stage payload. The presence of the AutoOpen macro and the execution of external code strongly suggest a malicious intent, likely delivered as a spearphishing attachment.

Heuristics 6

AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen 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.
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
Macro capabilities present but unconfirmed info MACRO_CAPABILITY_UNCORROBORATED

The document's VBA exposes execution capabilities (Shell/WScript/CreateObject/auto-exec) but nothing corroborates malicious intent — no obfuscation, memory-exec primitive, download+exec chain, encoded payload, LOLBin, DDE, AV hit, or suspicious URL. The verdict was capped at 'suspicious' so legitimate macro-heavy business documents are not flagged malicious on capability presence alone.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `5733c099dbef278a102925f978d6e4fae89e6d32a1ce69652816bda89a3c1883`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1244575 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.