Office (OLE) / .XLS malware analysis — malicious · 69d28a5a8d73eb19

MALICIOUS

Office (OLE) / .XLS

464.5 KB Created: 2018-12-06 20:43:11 Authoring application: Microsoft Excel

MD5: ece3b72e2c37f64fbae8036dd133b6e9 SHA-1: a8356dbaf1854a81b4d91008dadeb1548c04e779 SHA-256: 69d28a5a8d73eb19922fee874b0b92cd7e853149d4c816f8b869c8eeb2a28919

370 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer T1059 Command and Scripting Interpreter

The critical OLE_VBA_SHELL and OLE_VBA_WSCRIPT heuristics indicate the use of WScript.Shell for execution. The OLE_VBA_HTTP_DROP_EXEC heuristic confirms that the VBA code downloads a file from a URL and saves it to disk. The reconstructed URL is 'AppData\fyf/dsdd\klopjbgnkhoygoh0wkihkyghyggh{etgiwclw{tehgwtewt0npd/hojmsvi.tk/xxx00;tquui', which is likely the second-stage payload.

Heuristics 10

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC

VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
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
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
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)
Suspicious extracted artifact info 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `fdc7f67cbe59b825207bafbe80fe10e066dc619756e530e3e9bbe565ce9f733d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	41614 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 long base64-like blob(s).

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