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

Static analysis result for SHA-256 39b1307dddd862e1…

MALICIOUS

Office (OLE) / .DOC

1002.0 KB First seen: 2023-08-30
MD5: 488b7e127eb7bcecf4af4d377a9eb9ec SHA-1: 06a95521a337b5cd2d85e694fbb5dee7f5c0fcd1 SHA-256: 39b1307dddd862e13ad4d154d42bac860056144ab55b2a7c164e9ba7f43d0408
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an embedded Equation Editor OLE object that is known to exploit CVE-2017-11882. This vulnerability allows for remote code execution when the document is opened. No further payload or network indicators were extracted from this sample.

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
17ab253b4af28d17a61b6a9a50af1bdda29e52e736ffe29118ab3888ccc3a478		 ole-package OLE Ole10Native stream: oLE10nAtIVE 1015370 bytes

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