Office (OLE) / .XLS malware analysis — malicious · 315b246a2d3ee65d

MALICIOUS

Office (OLE) / .XLS

32.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-08-25

MD5: 51dd4cefaabbbcafe9f8e92cb05783f3 SHA-1: eab99fc816aec9038d01f54fb953c60ec09640a9 SHA-256: 315b246a2d3ee65d1532a9f14b708b9fef6dcd24e30011a05b19683fcf79c4b3

100 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic

The VBA macro contains a call to CreateObject, which is used to instantiate COM objects. The macro then constructs and executes a PowerShell command. This command is obfuscated but reconstructs to download a VBScript from 'http://malicious-domain.com/payload.vbs' and save it as 'C:\Users\Public\Documents\notepad.vbs' in the user's temporary directory, which is then executed.

Heuristics 3

Reference to PowerShell high SC_STR_POWERSHELL

Reference to PowerShell
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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` `5b7d7417474773f5be4eccbf61d7a56b5f7cc903e1554a17302dc164fb1a0910`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1377 bytes

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