Office (OLE) / .DOC malware analysis — malicious · 07b5938daa45decd

MALICIOUS

Office (OLE) / .DOC

137.0 KB Created: 2020-06-12 17:18:00 Authoring application: Microsoft Office Word

MD5: 98f98a15a414a397775d94f02156a822 SHA-1: bbdd6a14cfeb8c37cd9b842622efbc955309ab6a SHA-256: 07b5938daa45decd2bed911d64d3f590f4235a9403eec5dde302b94ac5f252b5

264 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1140 Deobfuscate/Decode Files or Information

The sample is a malicious Office document containing heavily obfuscated VBA macros, specifically an auto-exec loader. Heuristics indicate it uses GetObject and Shell execution, typical for downloading and running a secondary payload. The ClamAV detection name 'Doc.Downloader.Generic-8023922-0' further supports this downloader functionality.

Heuristics 8

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.
ClamAV: Doc.Downloader.Generic-8023922-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-8023922-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
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.
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` `16d4b675310a0216d7e30ee4c52534b34a089d8c8bfd56796cbd82ee7b8c77ff`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20639 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).

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