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Windows Analysis Report promo code83874071.xlsb

Overview

General Information

Sample Name:promo code83874071.xlsb
Analysis ID:528041
MD5:b6c09b88eeb411e648f688e7ca6a1ca9
SHA1:da6a58fbb01118bf77842f75cb217c3cf33ded2f
SHA256:cb53bf4394e7f77534ca8bfa1039fc76c50a54be4dce411926dbb594a1a55c52
Tags:xlsbxlsx
Infos:

Most interesting Screenshot:

Detection

Hidden Macro 4.0 Dridex Downloader
Score:92
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Yara detected Dridex Downloader
Multi AV Scanner detection for submitted file
Creates and opens a fake document (probably a fake document to hide exploiting)
Found Excel 4.0 Macro with suspicious formulas
Sigma detected: Microsoft Office Product Spawning Windows Shell
Document exploit detected (process start blacklist hit)
Creates processes via WMI
Document exploit detected (UrlDownloadToFile)
Found protected and hidden Excel 4.0 Macro sheet
Contains functionality to create processes via WMI
Found obfuscated Excel 4.0 Macro
Queries the volume information (name, serial number etc) of a device
Found a hidden Excel 4.0 Macro sheet
Potential document exploit detected (unknown TCP traffic)
Searches for the Microsoft Outlook file path
Yara detected Xls With Macro 4.0
Detected TCP or UDP traffic on non-standard ports
Sigma detected: Suspicious WMI Execution
IP address seen in connection with other malware

Classification

Process Tree

  • System is w10x64
  • EXCEL.EXE (PID: 6336 cmdline: "C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE" /automation -Embedding MD5: 5D6638F2C8F8571C593999C58866007E)
    • WMIC.exe (PID: 3876 cmdline: wmic process call create "mshta C:\ProgramData\MqscKrfE.rtf" MD5: 79A01FCD1C8166C5642F37D1E0FB7BA8)
      • conhost.exe (PID: 5192 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • mshta.exe (PID: 5380 cmdline: mshta C:\ProgramData\MqscKrfE.rtf MD5: 197FC97C6A843BEBB445C1D9C58DCBDB)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Initial Sample

SourceRuleDescriptionAuthorStrings
app.xmlJoeSecurity_XlsWithMacro4Yara detected Xls With Macro 4.0Joe Security

    Dropped Files

    SourceRuleDescriptionAuthorStrings
    C:\ProgramData\MqscKrfE.rtfJoeSecurity_DridexDownloaderYara detected Dridex DownloaderJoe Security

      Sigma Overview

      System Summary:

      barindex
      Sigma detected: Microsoft Office Product Spawning Windows ShellShow sources
      Source: Process startedAuthor: Michael Haag, Florian Roth, Markus Neis, Elastic, FPT.EagleEye Team: Data: Command: wmic process call create "mshta C:\ProgramData\MqscKrfE.rtf", CommandLine: wmic process call create "mshta C:\ProgramData\MqscKrfE.rtf", CommandLine|base64offset|contains: h, Image: C:\Windows\SysWOW64\wbem\WMIC.exe, NewProcessName: C:\Windows\SysWOW64\wbem\WMIC.exe, OriginalFileName: C:\Windows\SysWOW64\wbem\WMIC.exe, ParentCommandLine: "C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE" /automation -Embedding, ParentImage: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE, ParentProcessId: 6336, ProcessCommandLine: wmic process call create "mshta C:\ProgramData\MqscKrfE.rtf", ProcessId: 3876
      Sigma detected: Suspicious WMI ExecutionShow sources
      Source: Process startedAuthor: Michael Haag, Florian Roth, juju4, oscd.community: Data: Command: wmic process call create "mshta C:\ProgramData\MqscKrfE.rtf", CommandLine: wmic process call create "mshta C:\ProgramData\MqscKrfE.rtf", CommandLine|base64offset|contains: h, Image: C:\Windows\SysWOW64\wbem\WMIC.exe, NewProcessName: C:\Windows\SysWOW64\wbem\WMIC.exe, OriginalFileName: C:\Windows\SysWOW64\wbem\WMIC.exe, ParentCommandLine: "C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE" /automation -Embedding, ParentImage: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE, ParentProcessId: 6336, ProcessCommandLine: wmic process call create "mshta C:\ProgramData\MqscKrfE.rtf", ProcessId: 3876

      Jbx Signature Overview

      Click to jump to signature section

      Show All Signature Results

      AV Detection:

      barindex
      Multi AV Scanner detection for submitted fileShow sources
      Source: promo code83874071.xlsbVirustotal: Detection: 10%Perma Link