Office (OLE) / .XLS malware analysis — malicious · 57e25e6262406afc

MALICIOUS

Office (OLE) / .XLS

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

MD5: 3eb9cd7e234d2652c390096f19622a39 SHA-1: 0e0a74ee942b81bbf300c6d4dcab8184a0850bed SHA-256: 57e25e6262406afc81f656fce725df5f20a6b92c079284e7ff8c0278059bdfd0

380 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is an XLS document containing a Workbook_Open VBA macro. This macro utilizes Shell() and CreateObject() calls, indicating it attempts to execute external commands or scripts. The presence of 'SC_STR_WSCRIPT' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristics further suggests the macro is designed to launch a secondary payload, likely via Windows Script Host. No specific family could be identified, but the behavior is consistent with a downloader.

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` `503cf690ccee9e032adfa85ecda4c4832c1c1ec2c7ffa0d6a3693650ee9e41bd`	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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