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

Static analysis result for SHA-256 dce2b2fe2ff91db8…

MALICIOUS

RTF

7.2 KB First seen: 2019-01-11
MD5: e903845153b9cbee34ecac63e87b4a6d SHA-1: 316a73f74c208fb63ecdb9793143e0a0772b54ba SHA-256: dce2b2fe2ff91db8dc0bdfb148efd3428123216e2c66035a0cdeae7c64993e51
220 Risk Score

Malware Insights

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

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object with a CLSID indicative of the Equation Editor. Heuristics confirm the presence of OLE object data and the use of \objupdate, which forces OLE activation. ClamAV detection explicitly identifies this as Rtf.Exploit.CVE_2017_11882-6584355-1, confirming exploitation of the Equation Editor vulnerability.

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 3646 bytes
SHA-256: 12a1dbf00ffc28601bc4fb883c80f14ecdea6255596fce587efdee39cac28bec