Office (OOXML) / .XLSX malware analysis — malicious · aac964b49d6f12b4

MALICIOUS

Office (OOXML) / .XLSX

19.3 KB Created: 2021-04-15 11:37:12 UTC Authoring application: Microsoft Excel 15.0300

MD5: e776a82944a04d1939e9ce9916c30771 SHA-1: 080948c7533b52301fdaa5d3be8b04d58d24aa12 SHA-256: aac964b49d6f12b420121a28b5c856e473695e00cb5095b862ea9c0db67ed119

268 Risk Score

Malware Insights

MITRE ATT&CK

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

The OOXML file contains a Workbook_Open macro that utilizes WScript.Shell to execute commands. This macro is designed to download and execute a second-stage payload from the URL http://179.43.140.150/shtq/fack.jpg. The presence of Shell() and CreateObject() calls strongly indicates malicious intent.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
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.

URL http://179.43.140.150/shtq/fack.jpg
VBA project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `144ea9080fa24928e5ce8350a740c3fbd8bc994ad31b3f932de947cbee002302`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	7984 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `6288dd136d9cfc1b0f11138c251be40e7c0b8ae3ac584f6e121f54af09ca33b5`	vba-project	OOXML VBA project: xl/vbaProject.bin	25088 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(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.