Office (OLE) / .XLS malware analysis — malicious · 8e8b52a662481fe1

MALICIOUS

Office (OLE) / .XLS

52.5 KB Created: 2022-07-14 08:32:57 First seen: 2022-07-15

MD5: e64df5b48d65b88025e8f626c0303613 SHA-1: ea291184bce58a8d0ae5ff51d0b1e42648f2b524 SHA-256: 8e8b52a662481fe1a79873f3050e200ab6ca06bf02f18f04e865d807c713a8e8

228 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer

The critical heuristic 'OLE_VBA_HTTP_DROP_EXEC' indicates that the VBA macros within this Excel file download and save a file to disk. The script uses CreateObject and GetObject calls, typical for macro-based malware. The reconstructed URL 'http://pagaonline.com/pagaonline/pagaonline.exe' strongly suggests the intent is to download and execute a secondary payload, likely a downloader or dropper.

Heuristics 6

VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC

VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
ClamAV: Xls.Downloader.b83ac4c497e169b5-9980307-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.b83ac4c497e169b5-9980307-0
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject call
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `8c101d6f6e8c1a463f9f254cd803fa74a77a02dad14fafe8b01c0d44e5c5f1c0`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3645 bytes

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