Office (OLE) / .XLS malware analysis — malicious · cea1fec0b7c4253f

MALICIOUS

Office (OLE) / .XLS

44.5 KB Created: 2022-04-18 09:37:27 Authoring application: Microsoft Excel First seen: 2022-04-29

MD5: 82c87395c448b9f0b4c5c36ca3b5c582 SHA-1: 045ecca3b998253bcebb1250639d74f835b53ca0 SHA-256: cea1fec0b7c4253f7de02dc82d675da8514f12834ffa59fc80e8604af1a34a7e

308 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell T1059.005 Visual Basic T1204.002 Malicious File

The Workbook_Open VBA macro is configured to execute cmd.exe with the arguments '/c cd %TEMP% & TIMEOUT /T 10 & ipconfig'. This command is intended to create a VBScript file named 'ipconfig.vbs' in the temporary directory. The script then writes the content of the first shape on the second worksheet into this VBScript file. The macro's intent is to download and execute a second-stage payload via the created VBScript.

Heuristics 9

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
cmd.exe reference in VBA high OLE_VBA_CMD

cmd.exe reference in VBA
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.
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
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `06be45c36cc2c8ca506364cd80e72195b4ec9aa5ae4b71aa33b9fd4772582d23`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4119 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 4 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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