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

Static analysis result for SHA-256 db31771b423567e0…

MALICIOUS

Office (OLE) / .XLSX

251.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-12-02
MD5: 663302eb9943f93b672d0b4bda82d483 SHA-1: 93554cdeb1362f193ff3d96ffa6691f2941bbc90 SHA-256: db31771b423567e0dad13e11ec3ab7eaa2c1ffc4d7c0adad61df5366582e01f0
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 that the sample contains a payload designed to exploit this known vulnerability. The presence of Equation Editor OLE objects further supports this finding. The exploit likely leads to arbitrary code execution, enabling the attacker to deliver a secondary payload.

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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
566e3e81196d5dc76daf164a65722f16986ee01261cc13568986853514003fcf		 ole-package OLE Ole10Native stream: MBD027BA41F/Ole10Native 9830 bytes
ole10native_01.bin
45f657068376f276b7dda01e02d866e7cf3fdc7005aa897a5d8825fe12165aac		 ole-package OLE Ole10Native stream: MBD027BA420/Ole10Native 9818 bytes
ole10native_07.bin
0026a506a680bfff5765c15626f7f6e0317e3f1673ecdee92ea1c416625e0cf4		 ole-package OLE Ole10Native stream: MBD027BA426/OLE10NaTIve 2055 bytes

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