Office (OLE) / .XLS malware analysis — malicious · d65ab139d225ed35

MALICIOUS

Office (OLE) / .XLS

66.5 KB Created: 2023-09-11 00:30:47 Authoring application: Microsoft Excel First seen: 2023-09-13

MD5: fe07adc23f14c2b978038a4c1fbbc827 SHA-1: 9e7a42a40b8faa496bc8d732546e7ffbe007aab2 SHA-256: d65ab139d225ed355243df37e21662b2d78749f75867e5cc1f824677adcae0d4

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.002 Spearphishing Attachment

The file is an XLS document containing a Workbook_Open VBA macro, which is a common technique for initial execution. The macro utilizes CreateObject and GetObject calls, indicative of dynamic code execution. The ClamAV detection name 'Xls.Malware.Sagent-10008079-0' further confirms its malicious nature. The VBA code is heavily obfuscated, but the presence of auto-execution routines suggests it's designed to download and run a secondary payload.

Heuristics 6

ClamAV: Xls.Malware.Sagent-10008079-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Sagent-10008079-0
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `dd8daf01ed7e6b09e82380527236b435105a54daa84290b943d98f014cb91020`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4233 bytes

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