Office (OLE) / .DOCX malware analysis — malicious · 86f5a840e37520ee

MALICIOUS

Office (OLE) / .DOCX

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

MD5: bb48d9d78d79ec1bee9a97514347ce84 SHA-1: 2a354a23eb9cd48cf65ff7cdbd024c7ad57a3ad7 SHA-256: 86f5a840e37520ee3de241a48fb38347df2babd2b311ee264bad91bb349dd475

280 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file contains VBA macros, specifically a Document_Open macro that is configured to execute automatically. Heuristics indicate the use of CreateObject and GetObject, common for malicious macro execution. The ClamAV detection further confirms its malicious nature. The presence of the 'macros.bas' file suggests it's a macro-based downloader, likely attempting to fetch and execute a second-stage payload.

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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