Office (OLE) / .DOCX malware analysis — malicious · 4c01a100f2196b2a

MALICIOUS

Office (OLE) / .DOCX

151.2 KB Created: 2020-09-24 10:05:00 Authoring application: Microsoft Office Word

MD5: 5386f5134df214a91a18e2f2069622bc SHA-1: 6de6b7793a6b2573fe64bd88c19f6df614b0cb27 SHA-256: 4c01a100f2196b2ac8a43d41f1c9beb894ae460d87f37b2c884850fe5854bf4a

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The sample contains a VBA macro that is automatically executed upon opening the document, as indicated by the Document_Open heuristic. This macro utilizes CreateObject to likely execute a PowerShell command, as suggested by the obfuscated document body content which appears to be a PowerShell command. The presence of the 'macros.bas' file further confirms the macro-based nature of this malicious document. The primary intent appears to be the execution of a second-stage payload via PowerShell.

Heuristics 7

ClamAV: Doc.Trojan.Agent-9765752-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Agent-9765752-0
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` `b39e572cf96864edb4f5c39daa3a8388f74111156690860ca53002be67bbf3ff`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20583 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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