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

Static analysis result for SHA-256 55bb13f238afc01f…

MALICIOUS

Office (OLE) / .XLSX

289.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-12-07
MD5: bb662f1c659bdec696a16488f2a09eb2 SHA-1: 05b7248714b1ca5a083538ee4ad3e7f0caa19a58 SHA-256: 55bb13f238afc01fc8d11841d19e471d0980fbc78b2d8d69338bf42412964aba
140 Risk Score

Malware Insights

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

The critical heuristic firing indicates the presence of a payload specifically associated with CVE-2017-11882, delivered via an embedded Equation Editor OLE object. This exploit is known to facilitate arbitrary code execution. The presence of the OLE object and the specific CVE exploit strongly suggest a malicious intent to compromise the user's system.

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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
45f657068376f276b7dda01e02d866e7cf3fdc7005aa897a5d8825fe12165aac		 ole-package OLE Ole10Native stream: MBD0137D6BC/Ole10Native 9818 bytes
ole10native_06.bin
e57c247816485062938012636044d15eee30b4743b6ce754f60e3c3bf70e22fe		 ole-package OLE Ole10Native stream: MBD0137D6C2/oLE10NATIVE 2055 bytes

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