Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 892597399a743fcd…

MALICIOUS

RTF / .DOC

286.2 KB First seen: 2022-03-01
MD5: c6a7f482e0a796c802619a36824bc1bd SHA-1: 0799096a238701c6f062d0c5d099fa6fd0d034ce SHA-256: 892597399a743fcd05f4e0f6f3f97b3133b8ede796ca2270b7589d6c8f88c499
123 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model T1204.002 Malicious File

The RTF document contains multiple OLE objects, with specific heuristics indicating the use of \objdata and \objupdate, strongly suggesting an attempt to exploit OLE activation for code execution. The presence of Composite Monikers further supports this. No document body text or scripts were extracted, limiting the ability to determine the exact payload or delivery mechanism.

Heuristics 4

  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • \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 3 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000007d0.bin
8e034eb8d130fb2a19789877ef9a9d6f0b4416ed38c5a573e9d41a1bcaa3c413
rtf-objdata-decoded RTF \objdata at offset 0x7D0 49515 bytes
objdata_01_off00019abc.bin
ea39900f3f35bed9f78c8f6402daf7e23b4f89a2f7c10ee6f3ec6918b4c4be7e
rtf-objdata-decoded RTF \objdata at offset 0x19ABC 2632 bytes
objdata_02_off0001b05f.bin
44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037
rtf-objdata-decoded RTF \objdata at offset 0x1B05F 12297 bytes