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

Static analysis result for SHA-256 4741431661a62e7f…

MALICIOUS

Office (OLE) / .DOC

2.30 MB First seen: 2022-08-28
MD5: 3d18601a9d82f35ae43d2b0595669803 SHA-1: d6d8d576a6da2e4f6737ae405a434043449dbc87 SHA-256: 4741431661a62e7f70f5fcd9356405fcd5b98fa42317073fc72b3ae62487c44d
102 Risk Score

Malware Insights

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

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This technique is commonly used to deliver secondary payloads. The presence of an ole10native 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
ccfec07d29b92257d0ef3584b4b76241e3de18afbb155e716420a3531361fe77
ole-package OLE Ole10Native stream: ole10nATIVe 2386259 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.