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

Static analysis result for SHA-256 76aecd9eed7d8c0a…

MALICIOUS

Office (OLE) / .DOC

1016.0 KB First seen: 2023-08-30
MD5: 86228eeb3cc30ce2a9ff90825deb7cd6 SHA-1: 199a59a1d6769a51e74843e01f32b365e8c21948 SHA-256: 76aecd9eed7d8c0a2789c55971462a31094f89122a676a644a48760363ca67f7
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an embedded Equation Editor OLE object that is known to be vulnerable to CVE-2017-11882. This vulnerability allows for the execution of arbitrary code when the object is accessed. The embedded artifact 'ole10native_00.bin' likely contains the exploit payload.

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
d38b7bebd1a3114274169f723c25616d577a4c7f54e67c180918eea6aea8884d		 ole-package OLE Ole10Native stream: ole10NatIVe 1029726 bytes

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