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

Static analysis result for SHA-256 b9adff23a20154b8…

MALICIOUS

RTF

8.2 KB First seen: 2018-08-26
MD5: 1cae6f5d24051e127ff7e912765ade2f SHA-1: c0931b9895ce5cb116ee7b39a817a106259a2fff SHA-256: b9adff23a20154b8e690fb6130b4449818c122bb46e564ef5a9b7a996d581130
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 an embedded OLE object that exploits a known vulnerability in Microsoft Equation Editor (CVE-2017-11882). This exploit allows for arbitrary code execution upon opening the document. The ClamAV detection name directly identifies the specific exploit used.

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 4147 bytes
SHA-256: 183499557ff3b32069a61fa353207550e5ba60732c9a1d5a74b71868205967da