Malicious RTF — malware analysis report

Static analysis result for SHA-256 375138f520040a12…

MALICIOUS

RTF

48.8 KB
MD5: 11b593dbea98d0799b98d88192584e79 SHA-1: be9b9a41053db99ff928883458a0e9951f6453e8 SHA-256: 375138f520040a126c0b50f358dbe786df15a4bf23d6007882fe5b4e995a39bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers a critical vulnerability in the Equation Editor (CVE-2017-11882). 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_off0000010f.bin
ed4597aad56b68896186bb0e1d7342a58d4e43d96fc108b3b0f530315022d10c		 rtf-objdata-decoded RTF \objdata at offset 0x10F 3631 bytes

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