Malicious RTF — malware analysis report

Static analysis result for SHA-256 f44d9c0e2b279111…

MALICIOUS

RTF

9.3 KB First seen: 2021-07-07
MD5: 6862d6c010c8a07ec4a74727cea18e80 SHA-1: 45537b64fa56d57235e0db5bc768d7557f4e7392 SHA-256: f44d9c0e2b27911129044625a581f807d7b6f169bb8cc72623c4683984343803
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that leverages a known vulnerability in Microsoft Equation Editor. This technique is commonly used to deliver a malicious payload, leading to arbitrary code execution on the victim's system. No specific family could be identified from the available evidence.

Heuristics 3

  • Split hex Equation Editor ProgID + OLE object critical CVE likely RTF_EQUATION_EDITOR
    RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
  • 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_off000001c7.bin rtf-objdata-decoded RTF \objdata at offset 0x1C7 2376 bytes
SHA-256: ff51ecc39eab01132a59c434f609fd94efd92937dc30cf9f580c77f73f078e91

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