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

Static analysis result for SHA-256 5e458e56f23f18fe…

MALICIOUS

Office (OLE) / .DOC

889.0 KB First seen: 2022-11-24
MD5: d38967e524822d04257534078b0dc209 SHA-1: b2af456f879fba7dffa694d9386f501883118822 SHA-256: 5e458e56f23f18feb1e44f3eb3c15ab7d4d6cd9e937c72528dfce9d5e195ea3c
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the file contains a payload exploiting this specific vulnerability in the Equation Editor. This is a common method for initial execution of malicious code. The presence of an OLE object further supports this attack vector.

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
d6672ad029426fbe503b553e2e9d64833a1deb91135a4612321be4e061e4377a
ole-package OLE Ole10Native stream: oLe10NatIVE 900632 bytes