RTF malware analysis — malicious · 9002ba36886e5d02

MALICIOUS

RTF

662.8 KB

MD5: a457508127606de61a354d251321575a SHA-1: 56ee904265f8c4c705a99717a258862d4d1b8cf3 SHA-256: 9002ba36886e5d02ae812de23a029f3530334a5bb482df6bb101eea338ce1f3f

240 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains multiple indicators of malicious OLE object embedding, specifically related to CVE-2017-8570. This vulnerability allows for the execution of arbitrary code, likely by dropping and running a script. The document body contains a lure instructing the user to 'Enable Editing', which is a common tactic to bypass security measures and facilitate the exploit.

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.
Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\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 4 \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

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000bac.bin` `e8d0ca0d366c3e6fb93f3c367e466afb84f6ca77a54235af0b0b2635c88b58fd`	rtf-objdata-decoded	RTF \objdata at offset 0xBAC	221069 bytes
`objdata_01_off0000735b.bin` `cae5861a60379154da4c34c493778c61f03bde0c5ba524316d8b7d2d4326f21d`	rtf-objdata-decoded	RTF \objdata at offset 0x735B	221042 bytes
`objdata_02_off000777f2.bin` `51ef705eef602ac6eb91c2063c8f50d4e54b5e051b60429031d41133bc7df645`	rtf-objdata-decoded	RTF \objdata at offset 0x777F2	2632 bytes
`objdata_03_off00078d95.bin` `e8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7`	rtf-objdata-decoded	RTF \objdata at offset 0x78D95	12297 bytes

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