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

Static analysis result for SHA-256 d7c7e7817db03434…

MALICIOUS

Office (OLE) / .DOC

917.0 KB First seen: 2023-08-28
MD5: cd52f0162f3149f6a4bbc0163d3952a9 SHA-1: 50c3c7e672867219df4a5380d73bb23e5b12fa69 SHA-256: d7c7e7817db03434cdeb92deb9e3e70f640e33865cf116d951ba25a39ee18ef0
140 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious File T1559 Component Object Model Hijacking T1559.001 Component Object Model Hijacking: Component Object Model Hijacking

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within an embedded Equation Editor object. This vulnerability is commonly used to execute arbitrary code upon opening the document. The file's structure and the specific exploit identified strongly suggest a malicious document designed for exploitation.

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.
  • x86 GetPC stub (CALL $+5; POP EBX) high SC_GETPC_CALL
    x86 GetPC stub (CALL $+5; POP EBX)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
713ea063c6b261e1a2ef7109c9e0189daf8b1ac5b7e9a69fd9b4c7432771ccdb
ole-package OLE Ole10Native stream: Ole10NatiVE 928846 bytes