Office (OLE) / .XLS malware analysis — malicious · 2fc21f78d38708b2

MALICIOUS

Office (OLE) / .XLS

640.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: 3e23db29ce7cdc215bac52c531aed525 SHA-1: 57286b0272df8386254ba0fbe340f0fba2cafbc8 SHA-256: 2fc21f78d38708b2fd7d776780305ae303ec4277e41241462d4cf3f94a779d29

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.005 Service Execution: Visual Basic T1059.001 Command and Scripting Interpreter: PowerShell

The critical heuristic firing indicates the exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to load remote content. The embedded URL 'https://og1.in/coS4EQ' is the likely source of the secondary payload. Although VBA macros were present, they contained no executable statements, suggesting the exploit relies on the OLE vulnerability rather than macro execution.

Heuristics 2

OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199

Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
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 1

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

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