Office (OLE) / .DOC malware analysis — malicious · 077939298093e122

MALICIOUS

Office (OLE) / .DOC

210.5 KB Created: 2020-04-19 04:19:00 Authoring application: Microsoft Office Word

MD5: d5ba970e6b88cc26295d7ac9fbbaf3ed SHA-1: 758304040b3cef0a865fdfd7c8bca180d63c07a8 SHA-256: 077939298093e122bcec38dce3ca860b155f569a0ba2f9118cfcdd47ba7cd338

264 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The sample contains VBA macros, including an auto-executing 'Document_Open' macro. Heuristics indicate that these macros are obfuscated and designed to download and execute a file from a URL. The presence of CreateObject and Shell execution calls further supports the payload delivery mechanism.

Heuristics 8

VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC

VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER

Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
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.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact info 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.
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` `2e91f1d62b8fbea1542a80fb40864b634243b808cada61e73c545ba4a28de69d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8160 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 30 long base64-like blob(s).

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