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

Static analysis result for SHA-256 1f892dae54252e0a…

MALICIOUS

Office (OLE) / .DOC

962.5 KB First seen: 2022-10-29
MD5: 9035bfac537c476bb4364ff9dd70a679 SHA-1: 4c51a5c0a679235ed5ca09e8d0c905a3a81919bc SHA-256: 1f892dae54252e0a3b7c6a26535ad6b00e06c3f53486a3cffac8581575374aae
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains a critical heuristic indicating the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. This vulnerability is known to be used for initial execution, often leading to the download and execution of further malicious stages. No document body or scripts were extracted, but the exploit itself is sufficient evidence of malicious intent.

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
8a37078a83ccc26722e8dfc32a55d2a0f3526f128cd50a86b8112b922fd42c52
ole-package OLE Ole10Native stream: OLE10NAtIVE 974940 bytes