RTF / .DOC malware analysis — malicious · 677c02d5e9945a06

MALICIOUS

RTF / .DOC

216.4 KB First seen: 2022-09-27

MD5: ea350f9798e30f633bf20d59130d7d4f SHA-1: af8b57b17fa5b7cc1f4172f006790ff4973c1447 SHA-256: 677c02d5e9945a06e168397e071ad306e7a42d3699204349aef210f7117d7170

220 Risk Score

Malware Insights

MITRE ATT&CK

T1204 User Execution T1204.002 Malicious File

The RTF document contains OLE object data and triggers heuristics related to CVE-2017-8570, which is known to drop SCT scripts. The document body explicitly instructs the user to 'click Enable Editing', a common lure to bypass macro security. The embedded OLE object is likely a malicious script or executable.

Heuristics 7

Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE related CVE_2017_8570

RTF \objdata decodes to OLE data containing the Composite Moniker — CVE-2017-8570 (drops SCT script) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
OLE object data medium RTF_OBJDATA

RTF contains 3 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Suspicious extracted artifact medium 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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000960.bin` `345b2ba88759bfb8876aa5ac5dc8976e15057196ead8bf57efdce6ec2a15ffa0`	rtf-objdata-decoded	RTF \objdata at offset 0x960	14955 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off00008380.bin` `504a1216f00cdb016e51ea14d7ff68ead047e5a4c24c8ad7ca429d9d93fd8ad7`	rtf-objdata-decoded	RTF \objdata at offset 0x8380	2632 bytes
`objdata_02_off00009923.bin` `142dc43284d9abe994719f8fb67bc4c04bfc3f07528a1a66b0bad7e552ee8e78`	rtf-objdata-decoded	RTF \objdata at offset 0x9923	12297 bytes

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