Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 215ab558ab0d40c1…

MALICIOUS

RTF / .DOC

13.1 KB First seen: 2022-09-24
MD5: f0e756183c2be04cadf343e62851d58b SHA-1: 4de8d11be9693b8c17317fa4ed58f66e15b5eb1c SHA-256: 215ab558ab0d40c1199ce119b018daf8c479c79cd63469da713ae7c42f8924e7
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing via Service

The RTF document contains OLE object data and uses an objupdate heuristic, indicating it's designed to activate embedded objects. The SE_ENABLE_LURE heuristic confirms the document explicitly instructs the user to enable editing and macros, a typical social engineering tactic to bypass security measures and deliver a payload. No specific family could be identified.

Heuristics 4

  • \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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000b7c.bin
83b08b3c4568f552a0e583a7885db8262decef61cd93c4fb31f957c94f213cf1
rtf-objdata-decoded RTF \objdata at offset 0xB7C 4149 bytes