Office (OLE) / .XLS malware analysis — malicious · 760ffbc92c1e0992

MALICIOUS

Office (OLE) / .XLS

393.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-08

MD5: 7bd48815f0cc39dadcde4acf71d5320e SHA-1: 44bbacc6b3b25a60a6bff6d9da5a32ad5d12317f SHA-256: 760ffbc92c1e0992158fec5026861a7df83e3d812ccd17f6f6923b280bc9589a

148 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This vulnerability is commonly used to deliver secondary payloads. No VBA macros were found to contain executable statements, but the presence of the Equation Editor exploit suggests a direct exploitation vector rather than a macro-based one. The sample's primary function appears to be exploiting this vulnerability.

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 EDX) high SC_GETPC_CALL

x86 GetPC stub (CALL $+5; POP EDX)
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1206 bytes
`ole10native_00.bin` `0f9dc3570b9f4ed4f669fa0945d95a197ab4c45e229f34c57bf00173debfc130`	ole-package	OLE Ole10Native stream: MBD0178BDED/OLe10NatIvE	1411 bytes

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