Office (OLE) / .XLS malware analysis — malicious · d26d42b2ceeb0fea

MALICIOUS

Office (OLE) / .XLS

32.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-07-08

MD5: afe7324a8fc34cb3e10d2680fd7342fb SHA-1: a04a9873e708dee6a66c63d39ca6557a08dc111e SHA-256: d26d42b2ceeb0fea7805f95a2d154884de7c5563029edc1c70b70815fd363825

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File T1059.001 PowerShell

The critical OLE_VBA_CELL_GETOBJECT_EXEC heuristic indicates that the VBA code is designed to instantiate and execute content from worksheet cells. The script constructs a batch file path 'C:\Users\<username>\qsAuD.bat' and writes obfuscated content to it. The `ugshDvufw` function then uses `GetObject` to open this batch file, suggesting an attempt to execute it and likely download or run a second-stage payload.

Heuristics 5

VBA instantiates/executes content from worksheet cells critical OLE_VBA_CELL_GETOBJECT_EXEC

VBA passes a worksheet cell/comment reference to GetObject and drives an Exec/Open/Run sink. Malware hides the COM moniker and command in cell data so the macro source carries no literal indicators.
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject call
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` `2528e2ce4b6391882ab2e194198c0b20e94bd88784d20eb0b0e9eac8663feb6f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1680 bytes

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