Office (OOXML) / .OLE malware analysis — malicious · 0a7e2e56ddf65415

MALICIOUS

Office (OOXML) / .OLE

49.2 KB

MD5: e0fa9b6a05c0d441088dd36f168fef58 SHA-1: ee1f16dfc1cf358507767d92db164d25caaa49c2 SHA-256: 0a7e2e56ddf654151b898a8c0a1c0b9d18a6c29a05fbb7f75df72fc7c4cea175

282 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1140 Deobfuscate/Decode Files or Information T1204.002 Malicious File

The sample contains an obfuscated VBA loader within a Workbook_Open macro. This macro decodes a URL and uses PowerShell to download and execute a second-stage payload, identified as 'ccsetup120.exe', from 'https://ccleaner.tech/ccsetup120.exe'. The presence of a Workbook_Open macro and the obfuscated loader strongly indicate a malicious intent to download and run further malware.

Heuristics 7

Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER

Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
ClamAV: Xls.Dropper.EPPlus-9802867-2 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Dropper.EPPlus-9802867-2
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA project inside OOXML medium OOXML_VBA

Document contains a VBA project — VBA macros present
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` `d79d9aff89bdc01a4dafa08b39cf72c09cc6d2eec1cb875f9aee69949c4391cc`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	5552 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`vbaProject_00.bin` `baa572c7c661a04eeabd6606c8474c9892bb5a1853114f5eb4826de51b7a7ef2`	vba-project	OOXML VBA project: xl/vbaProject.bin	7168 bytes
Detection ClamAV: Xls.Dropper.EPPlus-9802867-2 Obfuscation or payload: unlikely

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