Office (OLE) / .XLS malware analysis — malicious · 16a64ebfe7b7969a

MALICIOUS

Office (OLE) / .XLS

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

MD5: 9d2126bc8b33bc2fac4e5d1bded0cd45 SHA-1: bb36f2204e7fd7257d528e5b2ce66478db65c271 SHA-256: 16a64ebfe7b7969a53a002f9ee6793bacb53d3d46562f428a6176c21bdb65dcf

370 Risk Score

Malware Insights

MITRE ATT&CK

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

The Workbook_Open macro uses WScript.Shell to create an object that accesses special folder paths, likely to stage a downloaded payload. The critical OLE_VBA_HTTP_DROP_EXEC heuristic indicates the VBA code downloads a file and saves it to disk, which is then likely executed. The presence of WScript.Shell and the download/execute behavior strongly suggest a downloader or droppper functionality.

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` `3c030895385b01e96c0caea64eefff02d585c719c954521e9ec4f2f4eeb149f7`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	34245 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 long base64-like blob(s).

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