RTF malware analysis — malicious · 3db6a9d007ae8c9d

MALICIOUS

RTF

220.6 KB First seen: 2022-03-31

MD5: e011fa872344ae0cdb1fb74521cba9ad SHA-1: a553ac43f94d767c3ca37bbc1d88ee208eae6705 SHA-256: 3db6a9d007ae8c9d6c980ae2231c92c572eb4569c2613b8f4cbf549c87236fa9

123 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model T1204.002 Malicious File

The RTF file contains multiple embedded OLE objects, with specific heuristics indicating the use of ".objupdate" and Composite Monikers. These techniques are commonly used to trigger the execution of malicious code embedded within the OLE objects when the document is opened. The file's structure strongly suggests an exploit delivery mechanism targeting OLE object activation.

Heuristics 4

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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000007d0.bin` `70696266b4890f57828249e766013d755943daf359fea92e4f46b3ed68fa7a8f`	rtf-objdata-decoded	RTF \objdata at offset 0x7D0	17235 bytes
`objdata_01_off00009476.bin` `d96306b20df67b297ae373555600b5ea693bd0b69df05a560b4d2ebff69ae93d`	rtf-objdata-decoded	RTF \objdata at offset 0x9476	2632 bytes
`objdata_02_off0000aa19.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xAA19	12297 bytes

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