Malicious RTF — malware analysis report

Static analysis result for SHA-256 dac5156c850ea9f5…

MALICIOUS

RTF

71.1 KB
MD5: ea306269bddebf5b39079d1dc9ae68e0 SHA-1: 8eeb464af69a501c57d7957b27ad712523d6c522 SHA-256: dac5156c850ea9f51ebd8a415b8309bb096326937b3bfae3c2ac2ce6a7d0f7c5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a critical vulnerability in Microsoft Equation Editor (CVE-2017-11882). This exploit allows for the execution of arbitrary code on the victim's machine, 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_off0000010a.bin
fd6c12a56ada9d4e68409b9b16ac161930588f7ba69740c579967bc98ed4914d		 rtf-objdata-decoded RTF \objdata at offset 0x10A 3631 bytes

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