Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 efca06da1bd2941d…

MALICIOUS

RTF / .DOC

23.3 KB First seen: 2022-08-01
MD5: 16c377d7e3761bc37d6a134080461af8 SHA-1: 6359cfa49eeb142f10a1ba9812c115fd63c945dc SHA-256: efca06da1bd2941d1f4218f82d40881b44d87ecf6d0d0392a6b2153088972b05
100 Risk Score

Malware Insights

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

The RTF document contains OLE object data and an \objupdate directive, indicating an attempt to activate and execute embedded content. The high entropy of the decoded OLE object suggests it may contain packed or encrypted code. Without further analysis of the embedded object, the exact payload and family remain unknown.

Heuristics 3

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000173f.bin
941ebeb30020017c37cb582020f5b6348c32b472c24b44a8b8351055a95b81e3
rtf-objdata-decoded RTF \objdata at offset 0x173F 4266 bytes