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Windows Analysis Report request-0132311.xlsb

Overview

General Information

Sample Name:request-0132311.xlsb
Analysis ID:528517
MD5:1479f6bfc2c47932d8eee6cf4db5c7f4
SHA1:7594bd2fb1fa9005662ece3c490fe80d28463e2c
SHA256:38e36a6b7bf101f5a8ddfb13756b8975413c91bad1828f83258afa6e564f1c32
Tags:Dridexxlsx
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
Found malicious Excel 4.0 Macro
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
Sample execution stops while process was sleeping (likely an evasion)
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
IP address seen in connection with other malware

Classification

Process Tree

  • System is w10x64
  • EXCEL.EXE (PID: 6280 cmdline: "C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE" /automation -Embedding MD5: 5D6638F2C8F8571C593999C58866007E)
    • WMIC.exe (PID: 6188 cmdline: wmic process call create "mshta C:\ProgramData\vULADISfrveNTj.rtf" MD5: 79A01FCD1C8166C5642F37D1E0FB7BA8)
      • conhost.exe (PID: 3620 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • mshta.exe (PID: 4988 cmdline: mshta C:\ProgramData\vULADISfrveNTj.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\vULADISfrveNTj.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\vULADISfrveNTj.rtf", CommandLine: wmic process call create "mshta C:\ProgramData\vULADISfrveNTj.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: 6280, ProcessCommandLine: wmic process call create "mshta C:\ProgramData\vULADISfrveNTj.rtf", ProcessId: 6188
      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\vULADISfrveNTj.rtf", CommandLine: wmic process call create "mshta C:\ProgramData\vULADISfrveNTj.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: 6280, ProcessCommandLine: wmic process call create "mshta C:\ProgramData\vULADISfrveNTj.rtf", ProcessId: 6188

      Jbx Signature Overview

      Click to jump to signature section

      Show All Signature Results
      Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEFile opened: C:\Windows\SysWOW64\MSVCR100.dllJump to behavior

      Software Vulnerabilities: