RTF malware analysis — malicious · a91b004373440d26

MALICIOUS

RTF

178.8 KB First seen: 2024-07-01

MD5: 82bb2c75e40c4beb166cfa0c3d7fc0bc SHA-1: c557bc291b9e0dc1527d2329ac80b82f07d0a1d8 SHA-256: a91b004373440d264723542622fe8f7f60e42acdee93d8535e01f7a9df1cccf7

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1027 Obfuscated Files or Information

The RTF document contains embedded OLE objects, indicated by the RTF_OBJDATA and RTF_OLE10NATIVE_STREAM heuristics. The RTF_OBJUPDATE heuristic suggests that these embedded objects are designed to be activated automatically upon opening the document. This points to a delivery mechanism leveraging OLE object exploitation to execute a secondary payload. No specific family could be identified from the available evidence.

Heuristics 3

Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM

RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
\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 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000133a.bin` `e69e3fe928d2c0a375722da03d52e59c87e52f847fabbb3c65599bda6076fa64`	rtf-objdata-decoded	RTF \objdata at offset 0x133A	4157 bytes

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