Malicious RTF — malware analysis report

Static analysis result for SHA-256 f1589f65d8094c7d…

MALICIOUS

RTF

56.5 KB
MD5: e16e1efbd419d55b0124b4ea16666acd SHA-1: cc5d21d39107c1c6ab9ef94173b3b03fd8403da0 SHA-256: f1589f65d8094c7d190855b50341682af72e5439e287ba58c0742334933a6e3a
160 Risk Score

Malware Insights

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

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution, likely to download and run a secondary payload. The presence of this exploit strongly suggests a malicious document intended for delivery via spearphishing.

Heuristics 4

  • CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882
    Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000108.bin
41cd639261f240fa450795f4e829790007278c79745163a384f412e7dd1da5d6		 rtf-objdata-decoded RTF \objdata at offset 0x108 3631 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.