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

Static analysis result for SHA-256 b84bed349e5e7ca2…

MALICIOUS

Office (OLE) / .DOC

853.0 KB First seen: 2022-11-30
MD5: ac48c0e9ca8dab383cd326e1f9bb18a2 SHA-1: e6442a90da55ea0daf13a1225275dfb6ea1fab21 SHA-256: b84bed349e5e7ca2176f78d5ef4e33d0e0d18b6fea55a6474e75d7a0de19c575
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 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 further supports this attack vector.

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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
933b030826f6617278e8b0de813afed4fb859d0437954ebb6e7e6ea0bc8af180
ole-package OLE Ole10Native stream: OlE10NativE 863822 bytes