Rtf.Exploit.CVE_2017_11882-6584355-1 — RTF malware analysis

Static analysis result for SHA-256 34e0b9622c7f61d5…

MALICIOUS

RTF

9.1 KB First seen: 2020-05-25
MD5: fdcab46dfdf88e7a83a951b0de252698 SHA-1: e1a9897c0e0c2a7e29a220e73c3fdb93e71e57db SHA-256: 34e0b9622c7f61d527a397438f3d4c7afe7e009d874db6f9b0a9cd825db58a99
220 Risk Score

Malware Insights

Rtf.Exploit.CVE_2017_11882-6584355-1 · confidence 95%

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains embedded OLE object data and specifically triggers heuristics related to Equation Editor exploitation. The ClamAV detection explicitly identifies this as CVE-2017-11882, a known vulnerability in Microsoft Equation Editor. This exploit is typically delivered via spearphishing attachments to achieve client execution.

Heuristics 5

  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000003b.bin rtf-objdata-decoded RTF \objdata at offset 0x3B 4646 bytes
SHA-256: 361cb29750c168edbb3eb54fb1aac167c7e0131ae12baf002edd075841698c62