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

Static analysis result for SHA-256 489e6a77763d5631…

MALICIOUS

Office (OLE) / .XLSX

288.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-12-02
MD5: 8b330fca4e3f56131727b3fc246ea937 SHA-1: ee2f2a899e8f2ee68a1b1bbcf3d54625682944f0 SHA-256: 489e6a77763d56312fa2f10bf16dda809618217106b58709e29ccd8fed01a9a6
140 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 indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This is further supported by the OLE_EQUATION_EDITOR heuristic. The presence of multiple embedded OLE packages suggests the delivery mechanism for the exploit. The sample is likely a dropper or exploit document leveraging this specific vulnerability.

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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
566e3e81196d5dc76daf164a65722f16986ee01261cc13568986853514003fcf		 ole-package OLE Ole10Native stream: MBD02684B81/Ole10Native 9830 bytes
ole10native_01.bin
1312e2cae314e43e1b59f2e083372676d526c511bfda0918f079e48b9707c9bd		 ole-package OLE Ole10Native stream: MBD02684B82/Ole10Native 9830 bytes
ole10native_07.bin
45f657068376f276b7dda01e02d866e7cf3fdc7005aa897a5d8825fe12165aac		 ole-package OLE Ole10Native stream: MBD02684B88/Ole10Native 9818 bytes
ole10native_10.bin
4dd8a5e9b5a988566b03d09e362fe58d10e0d67cf04269745b9c932d97c45237		 ole-package OLE Ole10Native stream: MBD02684B8B/Ole10NaTIve 1704 bytes

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