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

Static analysis result for SHA-256 7b52ba303e63deb9…

MALICIOUS

Office (OLE) / .XLS

561.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-11
MD5: f275f364c0e58b715ed9808107fce2a2 SHA-1: 9c3a67087d509328a5da1ecca4bd637f0e06949d SHA-256: 7b52ba303e63deb9a87417caa759f1b9d71dd74d39894ab90f316727b71fb65e
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 that this Excel file contains a malicious Equation Editor OLE object exploiting this specific vulnerability. The presence of VBA macros, though not containing executable statements directly, suggests a potential for further malicious activity or obfuscation. The file's primary purpose appears to be the exploitation of this known Microsoft Office vulnerability to deliver an unknown payload.

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 ECX) high SC_GETPC_CALL
    x86 GetPC stub (CALL $+5; POP ECX)
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
aebfa3cc9cffd1af88424a4828f90c2a91932c7006bd1640e9ae65f18d99a7e2		 ole-package OLE Ole10Native stream: MBD005F1987/Ole10Native 167172 bytes
ole10native_01.bin
7b8c755b704a35c2e1ab2ddb7e2d2b127147ec4c55f503ab518a378da22189a5		 ole-package OLE Ole10Native stream: MBD005F1989/OLe10Native 1955 bytes

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