Malicious RTF — malware analysis report

Static analysis result for SHA-256 f923cfd6ba310906…

MALICIOUS

RTF

50.4 KB
MD5: b14b0be987cf37eba54db6aee02861ab SHA-1: c4dd818e57292907d92e2846d803d5e8de4ed992 SHA-256: f923cfd6ba31090652aeb5014b58a6d439495f929c94cb4ba3bf2aa67137258a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload.

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_off0000010c.bin
e14a20d5a9d96894878114423d0ea0daa3b40541c76bb0f209497955aeb2ec2b		 rtf-objdata-decoded RTF \objdata at offset 0x10C 3631 bytes

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