Office (OLE) / .XLS malware analysis — malicious · 1634e1fe9e337283

MALICIOUS

Office (OLE) / .XLS

49.0 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel

MD5: 431c010db3f82bb94ca90faf73407950 SHA-1: fe21491603a95a301b75f39e15b4c0a0032537ed SHA-256: 1634e1fe9e337283a34c1c43629617b21100e1083c1413a5daa1a2650c967d6a

140 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment

The Workbook_Open macro executes a PowerShell command that downloads a second-stage executable from 'http://3.120.146.69/bgq/056081110023.exe' and saves it as 'C:\Users\Public\Documents\catchface.exe'. The macro also attempts to execute this downloaded file. The use of ShellExecuteW and the Workbook_Open event are common for initial execution of malicious payloads from Office documents.

Heuristics 4

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
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` `d32489ce6e5bd3249b11c8eaffe8d1ad3102209f9bbe75a5dd5e46aa83baeea5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1892 bytes

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