Office (OLE) malware analysis — malicious · 419f2789e530e519

MALICIOUS

Office (OLE)

154.3 KB Created: 2020-09-14 22:09:00 Authoring application: Microsoft Office Word

MD5: 9e41d53334312442d9df35e638106bc6 SHA-1: daacfa47690fa0c6f361ca064a39b68448798b1c SHA-256: 419f2789e530e519cd05e7370504fce2ce11204dd8f7854de8ce5ccd65593542

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a Microsoft Office document containing a VBA macro that automatically executes upon opening, as indicated by the 'Document_Open' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristics. The macro utilizes 'CreateObject' to likely download and execute a second-stage payload. The presence of 'macros.bas' and the ClamAV detection further support its malicious nature. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its lure.

Heuristics 7

ClamAV: Doc.Malware.Generic-9760527-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9760527-0
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` `bf2dc6e4793502154f28a14458af4f5198ccc48932a5641a4c34f7f1fcdc0c82`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18582 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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