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

Static analysis result for SHA-256 1916a5cae8376722…

MALICIOUS

RTF

8.2 KB First seen: 2018-08-26
MD5: c88d0b166cfdb9fa4c07018c676f3717 SHA-1: ae26c55e399ea142f0cbbd08fb15ece2f17179e8 SHA-256: 1916a5cae8376722e72c00a122b7807b87cd08413e169ce1b2bde727b5dc85e2
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 specific CLSID data indicative of the Equation Editor vulnerability (CVE-2017-11882). The presence of \objupdate further suggests that the OLE object is designed to be activated, leading to the execution of arbitrary code. ClamAV detection confirms this exploit.

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 4146 bytes
SHA-256: 628f8e017fb32e4f0b4d5bae71a67caab40dc151d637215fdae81a1cfa94800e