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

Static analysis result for SHA-256 c1b56eb5aefc375f…

MALICIOUS

Office (OLE) / .DOC

842.5 KB First seen: 2022-08-18
MD5: 438c10d48e4253588e10a47bee64f077 SHA-1: 6fe9d3d9e3d3806d5a6380ee5204e2018ce3326b SHA-256: c1b56eb5aefc375f97f7fb51a80c17acd1879f43db91eb98b5077208d080dce4
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.003 Command and Scripting Interpreter: Windows Command Shell

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. This vulnerability is commonly used to execute arbitrary code, likely to download and run a second-stage payload. The file type and heuristic firings strongly suggest this is a malicious document designed for exploitation.

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
acfa5864e12c67df5141cb8d0a9540ba7f1fce441b7a11f9aa5afcce01fbed24
ole-package OLE Ole10Native stream: oLE10NatiVe 853267 bytes