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

Static analysis result for SHA-256 79322f9d50d39efb…

MALICIOUS

Office (OLE) / .DOC

1010.0 KB First seen: 2023-08-29
MD5: 842f564e86912ce1cc052d982804dbfb SHA-1: f2b414277871f654dfa7be8204aa9e2aab67dc23 SHA-256: 79322f9d50d39efb4eee7996fe2d772a27aa93e6bcd698a2962218a4f31c7106
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the presence of a payload exploiting this known vulnerability. The embedded OLE object, ole10native_00.bin, likely contains the exploit code and subsequent stage malware. No document body text was available for further analysis.

Heuristics 2

  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
16bdfafd17b064a8cd2570326245a08dde0a6846f527b3059119355f06cc3f00
ole-package OLE Ole10Native stream: oLe10NatiVE 1023868 bytes