Office (OLE) / .XLS malware analysis — malicious · e08e2284379c2aa9

MALICIOUS

Office (OLE) / .XLS

15.0 KB

MD5: 611d6278867837f07a05ab6001b56fa9 SHA-1: 3d4b61a8e326838ac5a8baf66a0b4a4813dc62b0 SHA-256: e08e2284379c2aa901854bc02745310aa02d567eea99ab36735457a81cfde986

320 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is an XLS file containing a Workbook_Open VBA macro. This macro utilizes character-shifting functions (Asc, Mid, Chr) to decode and execute a shell command. This is a common technique for droppers to download and execute a second-stage payload. The ClamAV detection name 'Xls.Dropper.Agent-7652927-0' further supports this assessment.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
VBA character-shift decoded Shell command critical OLE_VBA_ASC_CHR_SHIFT_SHELL

VBA auto-exec macro stores an encoded command string, decodes it with a Mid/Asc/Chr character-shift loop, and passes the recovered text to Shell. This is a high-confidence command stager.
ClamAV: Xls.Dropper.Agent-7652927-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Dropper.Agent-7652927-0
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
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` `38b09cc4cee857956da7552b7ac76cad39297ea2437d52ed0499d1ba7d619547`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3097 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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