Office (OLE) / .DOCX malware analysis — malicious · 15587e3981acde8c

MALICIOUS

Office (OLE) / .DOCX

153.7 KB Created: 2020-09-22 12:58:00 Authoring application: Microsoft Office Word

MD5: f419db87c4cc4291f85803732502631c SHA-1: 364badbd4e672264bc68f36707f862902877d11c SHA-256: 15587e3981acde8cea14506a7eec74bb7254104c7b3020773de4fe4b17cb9cc3

242 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a strong indicator of malicious intent. The heuristics indicate the use of CreateObject and GetObject, common for downloading and executing payloads. The ClamAV detection further supports the malicious classification. The VBA script appears to be obfuscated, but its structure suggests it is designed to download and execute a second-stage payload.

Heuristics 7

ClamAV: Doc.Malware.Ewtz-9765445-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Ewtz-9765445-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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.
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` `3534612e311adddbcf2e093d61bfa43aa100b688e0fa70d64062312eb6cd9cc9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	17155 bytes

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