Office (OLE) / .XLS malware analysis — malicious · 8c6b2cdbb9debf73

MALICIOUS

Office (OLE) / .XLS

211.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-12-01

MD5: 4fac67a77347b0dbf064ff2bf1724ce5 SHA-1: 866bcfc2580bed81934a8b3b48cc89476d832cb6 SHA-256: 8c6b2cdbb9debf73f5963b1e2f0e3c70714b3441efdbae45b6dd7d4dcea16e42

142 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1559.001 Component Object Model

The sample is an Excel file containing a malicious Equation Editor OLE object, which is a known vector for exploiting CVE-2017-11882. This exploit is designed to execute arbitrary code, likely to download and run a secondary payload. The presence of multiple embedded OLE packages further supports this attack vector.

Heuristics 4

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)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin` `983a4075022c3b8598b11b027d88653fa045d968c5d93a5151fa0a6e789cf2c4`	ole-package	OLE Ole10Native stream: MBD021F802F/Ole10Native	7005 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.66, consistent with packed or encrypted content.
`ole10native_01.bin` `16c0d1be733fee2d0dfb58688ddeb276a115cf8e599f6fc4cc972e19fc5b0b80`	ole-package	OLE Ole10Native stream: MBD021F8030/Ole10Native	8967 bytes
`ole10native_04.bin` `45f657068376f276b7dda01e02d866e7cf3fdc7005aa897a5d8825fe12165aac`	ole-package	OLE Ole10Native stream: MBD021F8033/Ole10Native	9818 bytes
`ole10native_05.bin` `e2414e2459f3e4b9833e43e5a617482263e638bca49d573110c62ae07999e48e`	ole-package	OLE Ole10Native stream: MBD021F8034/olE10nAtiVe	1173 bytes

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