Office (OLE) / .XLS malware analysis — malicious · 018611d8dcab6fad

MALICIOUS

Office (OLE) / .XLS

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

MD5: ed3aca9a19a46e0d359ff77c9d4c0060 SHA-1: 87d52561bec34986316598764dd795907e4908df SHA-256: 018611d8dcab6fad539671b2a4d241d1548d15fe70290375a4879c02a458d0d0

140 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The Workbook_Open macro executes a command that downloads a second-stage payload from 'http://18.209.1.250/22/6014100023144.exe' and saves it as 'C:\Users\Public\Documents\teamsing.exe'. The macro also attempts to execute this downloaded file. The use of ShellExecuteW and the obfuscated string concatenation for the download command are strong indicators of malicious intent.

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` `eb924590c0ab2a5659548a6d0325496954102bb4ec838a032820f9c8c435006c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1880 bytes

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