Office (OLE) / .XLS malware analysis — malicious · 0aa59faa498f0960

MALICIOUS

Office (OLE) / .XLS

4.26 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-18

MD5: 864cf13bfae2e548b53d5e54e8ed0534 SHA-1: 5d1ba5ef0c883e22ca2293a53d980734ef59df7f SHA-256: 0aa59faa498f09603dc0bddd738cf5f402eb277893cb1f262730461fed95eab4

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing for CVE-2017-11882 indicates the exploitation of this known vulnerability through an embedded Equation Editor object. The presence of an OLE object and VBA macros further supports this. While no specific second-stage payload or network communication was directly observed in the static analysis, the exploitation of CVE-2017-11882 is a strong indicator of malicious intent, likely to download and execute further malware.

Heuristics 5

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.
PEB access via FS segment (x86) high SC_PEB_ACCESS

PEB access via FS segment (x86)
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.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `1d3b71b8c6234aace88f31f6e674b07383e015a2e68993dcd4fc2526aa470fe5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2412 bytes
`ole10native_00.bin` `f82c168ac847641b1ceac9187c430a89a6199182b98d01c1ad84405c660d8e03`	ole-package	OLE Ole10Native stream: MBD00E679FE/OlE10NAtiVe	3567881 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

Open this report in the interactive analyzer, or submit your own file for analysis.