Malicious RTF — malware analysis report

Static analysis result for SHA-256 94e09ea781f63ee2…

MALICIOUS

RTF

5.1 KB First seen: 2018-05-18
MD5: c1228938382a46606f53f592b77bf152 SHA-1: 4276550d0b2b3aa8e1922e3c217f6805784e2477 SHA-256: 94e09ea781f63ee2be9a9b5ccf6900e29d2510f02c73609033fa605596f7c5ec
122 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an OLE object that forces activation, exploiting CVE-2017-0199. This exploit is designed to download and execute a secondary payload from the embedded URL http://www.mozambiquecomputers.com/fbet.hta. The presence of OLE object data and the specific CVE exploit indicate a malicious document intended to deliver further malware.

Heuristics 4

  • CVE-2017-0199 (OLE2Link / weaponized URL) critical CVE exact CVE_2017_0199_WEAPONIZED_URL
    RTF contains a URL Moniker OLE link to a script/HTA/template-style remote loader, matching the tighter static CVE-2017-0199 shape.
  • \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 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 http://www.mozambiquecomputers.com/fbet.hta In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000003c.bin rtf-objdata-decoded RTF \objdata at offset 0x3C 2604 bytes
SHA-256: 1b7288ae05b0b0f2cff4a7485d66e86ba6ef14af84f10fde73935a9db3df03e4

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