Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 ef50dff54d2a4171…

MALICIOUS

Office (OLE) / .DOC

1.45 MB First seen: 2023-01-18
MD5: cf9acd7470f4cb802b5aa0c28f6e483b SHA-1: 27f2845fd6ce115ce03fb09c2e2fa4e4f8761eb3 SHA-256: ef50dff54d2a4171157d09a30db38aae8cfd702bf44d0ab6efc7c3a511dc955b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This vulnerability is commonly used to execute arbitrary code, likely to download and run a secondary payload. The presence of the ole10native_00.bin artifact further supports this finding.

Heuristics 3

  • Equation Editor Ole10Native payload — CVE-2017-11882 critical CVE likely CVE_2017_11882_EQUATION_OLE10NATIVE
    An embedded Microsoft Equation 3.0 object (CLSID 0002CE02-0000-0000-C000-000000000046) carries an Ole10Native packager stream instead of the normal Equation Native/MTEF data. This is the weaponized Equation Editor RCE delivery shape used by CVE-2017-11882 / CVE-2018-0802 maldocs. The payload (font-record overflow + shellcode) is frequently encrypted and the stream name case-scrambled to evade scanners, but an Equation object holding an Ole10Native stream has no benign use.
  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
d286853a21ca7d749986b270554d3e1239293dc76a1b1760d7a5c71d49b56033
ole-package OLE Ole10Native stream: ole10NATIVe 1508006 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.