RTF malware analysis — malicious · 7874cf4190f58638

MALICIOUS

RTF

162.3 KB First seen: 2024-07-01

MD5: 418c12bd742fe4bc4cf4849870bfc01c SHA-1: e0dde1237e149662e691ea7fba799f3d0d3aff1d SHA-256: 7874cf4190f58638d9950fe8d450ac98a03dd4bac70bcc43edc4ab3f482a6765

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution

The RTF file contains an embedded OLE object with a critical heuristic indicating exploitation of CVE-2017-11882. This technique is commonly used to deliver a second-stage payload. The presence of objdata and objupdate heuristics further confirms the exploitation of OLE object activation within the RTF document. The specific exploit, CVE-2017-11882, is a known vulnerability in Microsoft Equation Editor.

Heuristics 5

Equation Editor Ole10Native payload — CVE-2017-11882 likely critical CVE likely CVE_2017_11882_EQUATION_OLE10NATIVE

RTF decodes to an activated Microsoft Equation 3.0 OLE storage whose payload is a high-entropy Ole10Native stream rather than normal Equation Native/MTEF data. This is a weaponized Equation Editor RCE delivery shape consistent with CVE-2017-11882/CVE-2018-0802.
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
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001d3d.bin` `2903ffc139525c7689afc15c4e63c3f7944a631cf18f15e4880a438e1813c904`	rtf-objdata-decoded	RTF \objdata at offset 0x1D3D	3669 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.