Office (OLE) / .DOCX malware analysis — malicious · 7e8e6f96a8fd4269

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 4a9b1f7a2cff35306a6c78e53e69129d SHA-1: e73fbe9abb831bf59d37bd41b9aafac327f3a84a SHA-256: 7e8e6f96a8fd426982b68e50bdb93848fc650bdc4c963ab37b6095ca64c069f1

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a Microsoft Office document containing a high-confidence VBA macro that executes automatically via the Document_Open event. This macro utilizes CreateObject and GetObject calls, indicative of malicious activity. The presence of the 'macros.bas' artifact and the ClamAV detection further support its malicious nature. The primary intent appears to be the execution of a second-stage payload, though the specific download mechanism is not detailed in the provided heuristics.

Heuristics 8

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