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

Static analysis result for SHA-256 a35245a5b77388e5…

MALICIOUS

Office (OLE) / .DOC

923.0 KB First seen: 2022-07-18
MD5: 0452ed44d96ffe9557214ecbdbffcc08 SHA-1: 81bd06e408cd064f852eeb94dcc7fe20a78f4c10 SHA-256: a35245a5b77388e59b5ab0f5c99c0b04edf4f9f31a131cb3683e7c4595bc4801
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious File T1559.001 Component Object Model Hijacking: Component Object Model

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 execute arbitrary code, likely leading to the download and execution of a secondary payload. The presence of an OLE object containing this exploit payload strongly suggests a 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
da075130e0113d8d6f2e6b1b3faf9433ea5d1122a868b6799e81d05c1fc683a3
ole-package OLE Ole10Native stream: OLe10naTive 935195 bytes