Office (OLE) malware analysis — malicious · 3535ec01e3c3d8fc

MALICIOUS

Office (OLE)

155.7 KB Created: 2020-09-15 06:22:00 Authoring application: Microsoft Office Word

MD5: da3ab88d4a02450fd1765adb8dd9c5eb SHA-1: afd78e352f0d5401d06bda2f74bbcdd64996507e SHA-256: 3535ec01e3c3d8fc3160172299ca4609164fc944b3478769fb9b66ac701e50fb

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is identified as malicious by ClamAV and contains VBA macros. The 'Document_Open' macro, combined with a 'CreateObject' call, indicates an attempt to automatically execute code upon opening. The presence of 'macros.bas' suggests a macro-based attack. The script's intent appears to be downloading and executing a second-stage payload, though the exact URL or execution method is obfuscated within the VBA code.

Heuristics 7

ClamAV: Doc.Malware.Ewlu-9762385-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Ewlu-9762385-0
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` `0812334775ad413ac951a2705cc110a8397311927e3a75099eb95d4d59503241`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	23048 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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