Office (OLE) / .DOCX malware analysis — malicious · 5b8a09ecc983f2bf

MALICIOUS

Office (OLE) / .DOCX

174.0 KB Created: 2021-01-22 12:16:00 Authoring application: Microsoft Office Word

MD5: bc9d0d8958556bb6015941e3f02c8445 SHA-1: 2e624220372efb39426bb4e950c3f89c9cd5b319 SHA-256: 5b8a09ecc983f2bfa3c172b58755d141faaaa80c8016de77c9cbcdd83805d5ab

202 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, specifically a Document_Open macro that is configured to execute upon opening the document. Heuristics indicate the use of CreateObject, a common technique for launching malicious code. The ClamAV detection name 'Doc.Malware.Emodldr-10033989-0' suggests it is a known downloader. The VBA code appears to be obfuscated but its structure suggests it is designed to download and execute a second-stage payload.

Heuristics 6

ClamAV: Doc.Malware.Emodldr-10033989-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emodldr-10033989-0
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.
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` `57c5fc8ce17815567da52642c52710073a1f26f502815de80b26d094034f9496`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	16557 bytes

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