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

Static analysis result for SHA-256 3583371422db105f…

MALICIOUS

Office (OLE) / .DOC

909.0 KB First seen: 2023-08-28
MD5: f384bf527a37e7bb8c18b280401f127d SHA-1: b9393de306f2b6eedd8560aa42377af654e9b445 SHA-256: 3583371422db105f2d825d42fb0aef58214c60ae3950f654b4af5cecff8c23a5
100 Risk Score

Malware Insights

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

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the presence of a known exploit within an Equation Editor OLE object. This exploit is commonly used to execute arbitrary code, likely to download and run a second-stage payload. The document body was unreadable, 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
7f727ad31957af09a8b31ce11cf04788d6fd84a2bd7c6d85007e8e0c3f4ee9c5
ole-package OLE Ole10Native stream: olE10NAtivE 920996 bytes