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

Static analysis result for SHA-256 85e3c8a90149c4f7…

MALICIOUS

RTF

8.1 KB First seen: 2018-07-18
MD5: 3354ae57c093989e6120989cdfddd8ef SHA-1: 40722ba16f3c42ac74a497e7dd9e5ac26b621e7c SHA-256: 85e3c8a90149c4f77c61286a02271f9278e32797da905a10af942ae394dec294
220 Risk Score

Malware Insights

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

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an RTF document that contains an embedded OLE object. Heuristics indicate the presence of an Equation Editor exploit, specifically CVE-2017-11882. This exploit is designed to execute arbitrary code when the OLE object is activated, likely leading to the download and execution of a secondary payload.

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_off0000003c.bin rtf-objdata-decoded RTF \objdata at offset 0x3C 4137 bytes
SHA-256: 7be058961298d229827d792ecd49ec52c30e4c0bec570589f30ffd9b0557eb6a