Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 a372f7669258d785…

MALICIOUS

RTF / .DOC

8.6 KB First seen: 2022-08-24
MD5: 83b679b8e345d275342d2bee68c64a24 SHA-1: af909453820183619ad391651681824a635fefdf SHA-256: a372f7669258d785704496c5824d5212c269810eaf12b0761e517736c35e9350
80 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 command, indicating it's designed to activate embedded objects. The SE_ENABLE_LURE heuristic confirms the document instructs the user to enable editing, a common tactic for macro-based malware droppers. The presence of OLE objects and the lure suggest the file is a malicious dropper aiming to bypass security measures and execute further stages.

Heuristics 3

  • \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 2 \objdata section(s) — embedded OLE objects
  • 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_off00000d76.bin
9d76bcb310a2abe7627351633a7af72fc98f3846a5c43aec0ac8d9d65525b1c7
rtf-objdata-decoded RTF \objdata at offset 0xD76 1609 bytes