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

Static analysis result for SHA-256 0b97d2123754dc9e…

MALICIOUS

Office (OLE) / .XLSX

250.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-12-02
MD5: ba0a934b6dd5af65ca9a82782d44e843 SHA-1: 5957a4921c66e0bfae31d096e2a86a9c73feb5b0 SHA-256: 0b97d2123754dc9e52e88001fc59c0343b37965172255bcc4b1d592c0df69309
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1559.001 Component Object Model Hijacking

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE directly indicates exploitation of this known vulnerability. The presence of Equation Editor OLE objects further supports this finding. The exploit likely leads to the execution of a second-stage payload, although no specific details of that payload were extracted.

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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
1312e2cae314e43e1b59f2e083372676d526c511bfda0918f079e48b9707c9bd		 ole-package OLE Ole10Native stream: MBD0267EDE5/Ole10Native 9830 bytes
ole10native_01.bin
45f657068376f276b7dda01e02d866e7cf3fdc7005aa897a5d8825fe12165aac		 ole-package OLE Ole10Native stream: MBD0267EDE6/Ole10Native 9818 bytes
ole10native_07.bin
bf1035944a04fa454cdd82105fa5663ddd1926f7c1b320eb9edb344a4a4666a8		 ole-package OLE Ole10Native stream: MBD0267EDEC/oLe10NATiVe 1807 bytes

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