Office (OLE) / .XLS malware analysis — malicious · c0e7779d3ee55e9d

MALICIOUS

Office (OLE) / .XLS

670.5 KB Created: 2020-12-14 12:22:57 Authoring application: Microsoft Excel

MD5: 9909775be4d2e9cd06957e9819e77d0e SHA-1: 130512f34f289b8d90d0d16e7813efa6c85be12e SHA-256: c0e7779d3ee55e9d37636184c44671d1a778d6a81513efba0a325143bf4d6d2b

380 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The XLS file contains VBA macros, including a Workbook_Open auto-execution routine. This routine utilizes the Shell() function, indicating an attempt to execute arbitrary commands or download additional payloads. The presence of WScript references further supports the execution of external scripts. While no specific family is identified, the macro-based execution is a common delivery method for various malware types.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Xls.Packed.Logan-9752153-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Packed.Logan-9752153-0
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
CallByName call high OLE_VBA_CALLBYNAME

CallByName 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `2635221479a05de31d2f260d507b9eaa7f37ce921ac6af92ef3fd2348c9c64ba`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	61805 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`ole10native_00.bin` `e33e31bea5eaaab7f7e4adab9e161405e565969c79bd911aafb503e0d1c6ed7f`	ole-package	OLE Ole10Native stream: MBD0049F25B/Ole10Native	439111 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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