Office (OLE) / .XLS malware analysis — malicious · eac82994777b6430

MALICIOUS

Office (OLE) / .XLS

452.0 KB Created: 2020-10-05 07:14:01

MD5: 4f4b085463f4a8885497de8cbcc2aceb SHA-1: a59370e6143369be9c017970158e4e7db617554a SHA-256: eac82994777b64301341675612fcacac8f08af9d468014c8de9f15aa3c784b42

140 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The sample contains a Workbook_Open VBA macro that utilizes CreateObject to execute a PowerShell command. This command downloads a file from http://45.66.250.101/iT/PSI-00577.jpg and saves it as C:\Users\Public\Documents\ewwejrfrpq.exe, then executes the saved file. The macro's intent is to download and execute a second-stage payload.

Heuristics 4

Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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` `4c21f254f57ed3b46b5dfa1286dbcc3f277c38418a652ec0f381670ddf4b52c7`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1259 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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