Office (OLE) / .DOCX malware analysis — malicious · 5f87d95e028a5e89

MALICIOUS

Office (OLE) / .DOCX

176.1 KB Created: 2020-09-28 21:56:00 Authoring application: Microsoft Office Word

MD5: a6f71e017c98d587acb891c592dd0f9d SHA-1: 38e80b667f0d6483d512d9b85cc22f64d7299218 SHA-256: 5f87d95e028a5e898dd317d4a0e297434e8b30770d448c4a07687bfc44e9688d

202 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is a malicious Office document containing obfuscated VBA macros. The 'Document_Open' macro and 'CreateObject' calls indicate an attempt to execute code upon opening. The script attempts to construct a string using concatenation and then passes it to a function that likely executes it, suggesting it's a downloader for a second-stage payload. The obfuscation and generic nature of the heuristics lead to an 'unknown family' classification.

Heuristics 6

ClamAV: Doc.Malware.Generic-9769001-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9769001-0
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` `fe19635e7383e285d173bce1f5bbd9867258f7974e3830e10aecb187a337391c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6691 bytes

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