Malicious RTF — malware analysis report

Static analysis result for SHA-256 e7af37d0c3951dd8…

MALICIOUS

RTF

70.6 KB
MD5: 89249d1735934f779721b7626e53bbdc SHA-1: 645d3721b150a56cb35e6a728ecb753301e5cc28 SHA-256: e7af37d0c3951dd8b4643de249880f2bbcdfdb76157e88817992f50eaf507747
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 CVE-2017-11882, a known vulnerability in Microsoft Equation Editor. This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. The file is classified as malicious due to this exploit.

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_off00000111.bin
9030a399748798f78b973103f613c3e2caf89c75369c6f678b5d288e6025c90e		 rtf-objdata-decoded RTF \objdata at offset 0x111 3631 bytes

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