Office (OLE) / .DOCX malware analysis — malicious · 9f74c5855fc6ea9a

MALICIOUS

Office (OLE) / .DOCX

191.6 KB Created: 2020-09-18 12:16:00 Authoring application: Microsoft Office Word

MD5: 138357338b5e2fcffa41bf719d714fb5 SHA-1: 7782f8b715a054c1b9a49993f029a9e9bf5149c3 SHA-256: 9f74c5855fc6ea9a1b608bc0a74b1ee1b6b0f14aa431ed67565aba64e7aab0a4

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a malicious Office document containing a large VBA macro. The 'Document_Open' macro is present and configured to execute automatically, utilizing 'CreateObject' which is a common technique for downloading and executing further payloads. The ClamAV detection as 'Doc.Downloader.Generic' further supports this. No specific family could be identified, but the primary IOC is the embedded macro file.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763532-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763532-0
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.
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` `ba8241e4388725ade491e6e42da3e5f9cf169555b4f6e61ff9f624691af3445f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20213 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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