MALICIOUS
320
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The RTF document contains multiple indicators of exploitation for CVE-2017-8570 and CVE-2017-0199, leveraging OLE object data and composite monikers. These vulnerabilities are known to facilitate the execution of arbitrary code, typically by downloading and running a second-stage payload. The presence of extracted artifact objdata_01_off00006f89.bin suggests a dropped file, likely the payload.
Heuristics 8
-
Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE_2017_8570RTF \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.
-
CVE-2017-0199 / CVE-2017-8759 (OLE2Link auto-activated remote loader) critical RTF_OLE2LINK_REMOTE_MONIKER_LOADERRTF embeds an OLE2Link object that is force-activated with \objupdate (no user interaction on open) and fetches a remote second stage — through an INCLUDETEXT/INCLUDEPICTURE field or the OLE object's own moniker. This is the OLE2Link auto-update attack path shared by CVE-2017-0199 (server returns an HTA/scriptlet) and CVE-2017-8759 (server returns a SOAP WSDL the .NET parser compiles). Office processes the fetched response through the same code path; the specific CVE depends on the now-unreachable server content type.
-
Composite Moniker in RTF OLE object high RTF_COMPOSITE_MONIKER_RELATEDRTF 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_OBJAUTLINKRTF 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_OBJUPDATERTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
-
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGEOne 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.
-
OLE object data medium RTF_OBJDATARTF contains 4 \objdata section(s) — embedded OLE objects
-
Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
🗂 Part of campaign:
shared payload 3cd3b7d42e
51 samples
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off000007da.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x7DA | 65990 bytes |
SHA-256: c82a88b2edf911ff37466b3499a1ea1c10f6df6d78f9388c1dc19b57c7eb816e |
|||
objdata_01_off00006f89.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x6F89 | 65963 bytes |
SHA-256: 858ec51b226c929c18ea69122fbb5aa739fd3e8678678cb77cfe41ac1b1ac225 |
|||
|
Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Static shellcode analysis recovered command string(s): WScript.Shell"")")
|
|||
objdata_02_off0002881c.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x2881C | 2632 bytes |
SHA-256: 32e8e449cdc043249ce37c79c9eaf2af80a02cb8175718a8a0ce726d961b7d16 |
|||
objdata_03_off00029dbf.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x29DBF | 12297 bytes |
SHA-256: e8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7 |
|||
Open this report in the interactive analyzer, or submit your own file for analysis.