Office (OLE) / .XLS malware analysis — malicious · 5c557c74c4fabb6c

MALICIOUS

Office (OLE) / .XLS

32.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-08-23

MD5: 3ec8f34180dcb7030b85d78338d73d2b SHA-1: eb32139c34dc2a6e8669264448844bd4ce7eb947 SHA-256: 5c557c74c4fabb6c6a6ba18274e34f4cf9deb2a902b60367d7fda10de8b22ada

100 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic

The sample contains VBA macros that leverage CreateObject to execute a PowerShell command. The PowerShell command is obfuscated but reconstructs to download and execute a VBScript from 'http://denik.kt/abilaba/packed/Client.vbs' and save it as 'notepad.vbs' in the temp directory. The VBA macro also attempts to establish persistence by writing to the Run key 'HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy'.

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` `f791e624d06b7d6203781a494f0b8af78a901da9d778514643843c925c3dc2fd`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1377 bytes

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