Office (OLE) / .DOC malware analysis — malicious · f7c22ce0568b299b

MALICIOUS

Office (OLE) / .DOC

113.5 KB Created: 2020-05-12 23:48:00 Authoring application: Microsoft Office Word

MD5: 54ba67bbccbd98b0aaf9308bfd063d22 SHA-1: 22cf35949b8c89d1857ac135ad435032e7d69ceb SHA-256: f7c22ce0568b299bfa0e809fc4c979156cc6ee63234847e0e720d7962c1e5e40

208 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 OLE document containing VBA macros. Heuristics indicate the use of 'certutil' for downloading and decoding, and a 'CreateObject' call, suggesting the execution of external code. The presence of 'macros.bas' further supports this. The document body appears to be a hex-encoded executable, which the VBA macros likely decode and execute.

Heuristics 7

ClamAV: Doc.Dropper.HexEncodedEXEHeader-9789587-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.HexEncodedEXEHeader-9789587-1
Reference to certutil (download/decode) high SC_STR_CERTUTIL

Reference to certutil (download/decode)
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)
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` `ae42740acadced8878a7b0d2432fffc50c3d668c3bdc3fcf5e84c0a5e8e499d1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2740 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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