Malicious RTF — malware analysis report

Static analysis result for SHA-256 e42bebb9fcc1905e…

MALICIOUS

RTF

213.9 KB First seen: 2021-09-15
MD5: 426df310b1e03c20e9b66358e8272875 SHA-1: 0fb84b64eb80ce56c45fec46bdc5fdac47e0248b SHA-256: e42bebb9fcc1905e26b469ddf4b171621904415bf26467d4857e06f2fd18c8e0
100 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, CVE-2017-11882, in Microsoft Equation Editor. This vulnerability allows for the execution of arbitrary code on the victim's machine, likely to download and run a secondary payload.

Heuristics 3

  • 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.
  • 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_off00000047.bin rtf-objdata-decoded RTF \objdata at offset 0x47 3639 bytes
SHA-256: f05e6aae39d7418fda9967ee84441def6af188298b05106fb451cbf80a0ca72d

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