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

Static analysis result for SHA-256 825ed8d738548939…

MALICIOUS

Office (OLE) / .DOC

845.5 KB First seen: 2023-08-29
MD5: c29a0ecf7a59999923245b1976bb2cf0 SHA-1: 83cc5151280ee1fe7b20b279c34f7d5d99ee68c8 SHA-256: 825ed8d73854893942dde01fa53dab26e81b25e0fcad18c9eeb10e111be95063
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the presence of a known exploit targeting Microsoft Equation Editor. The OLE_EQUATION_EDITOR heuristic further confirms the use of this object. The SC_GETPC_CALL heuristic suggests obfuscation or packing techniques within the exploit payload. The exploit likely serves as a dropper for a secondary malicious payload.

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 EDI) high SC_GETPC_CALL
    x86 GetPC stub (CALL $+5; POP EDI)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
24ce43e704ad8d65f3aa46f4135120bb5018090b99041c758001603923124503
ole-package OLE Ole10Native stream: OlE10naTIVE 856180 bytes