CVE-2017-11882 exploit RTF malware analysis — malicious · 596207c6b26e6574

MALICIOUS

RTF

9.2 KB First seen: 2018-07-23

MD5: 2f941d724c7b6224707e6f591a32d5b4 SHA-1: b93c1a845f3d492ed974ec8efca5a4b08e0c3ecf SHA-256: 596207c6b26e65744e4f545a65f81753c61f033f8b790b3ac47d44d690d88269

240 Risk Score

Malware Insights

CVE-2017-11882 exploit · confidence 95%

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is identified as malicious due to critical heuristic firings indicating the exploitation of CVE-2017-11882 via Microsoft Equation Editor. The presence of OLE object data and an objupdate directive further supports this, suggesting the RTF document is designed to trigger code execution upon opening. This is a common method for delivering malware via spearphishing attachments.

Heuristics 6

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
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.
ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
\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
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000003b.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3B	4662 bytes
SHA-256: `312562db3b793b69c18e0afbe8d492135f5f2a1ac45319b3e0e1d9b169c98978`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL

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