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

Static analysis result for SHA-256 9b98c4fcea2e15ac…

MALICIOUS

Office (OLE) / .DOC

2.05 MB First seen: 2022-09-14
MD5: c50d9dea60016ac6a94763adab154d4a SHA-1: edf97a55d166c6f0ba92109ca516a0231fb01590 SHA-256: 9b98c4fcea2e15acb664efaaccc0981bc1254ac814051d4b799d67be002115c4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1027 Obfuscated Files or Information

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 drop and execute secondary payloads. The presence of an embedded OLE object further supports this attack vector.

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
6a36dfb0957e211c6ee5ce2e4bf7384c611371aa4784d092dc051df54b446c4e
ole-package OLE Ole10Native stream: oLe10NaTIve 2125832 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.