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Analysis Report audit-367497006.xlsb

Overview

General Information

Sample Name:audit-367497006.xlsb
Analysis ID:431855
MD5:6a44858ca2fe28f5e2c4eed2c5a360e4
SHA1:e793cbf64ad364c93e3a673a090977a3434cb6d9
SHA256:49558300c4315c8c53216a8c17e32ff87ca4be34547ab064de7d872d429bb3f3
Tags:xlsx
Infos:

Most interesting Screenshot:

Detection

Hidden Macro 4.0
Score:76
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Multi AV Scanner detection for domain / URL
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Document exploit detected (UrlDownloadToFile)
Document exploit detected (process start blacklist hit)
Found Excel 4.0 Macro with suspicious formulas
Found abnormal large hidden Excel 4.0 Macro sheet
Sigma detected: Microsoft Office Product Spawning Windows Shell
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
Potential document exploit detected (performs DNS queries)
Potential document exploit detected (performs HTTP gets)
Potential document exploit detected (unknown TCP traffic)
Registers a DLL
Tries to load missing DLLs
Yara detected Xls With Macro 4.0

Classification

Process Tree

  • System is w10x64
  • EXCEL.EXE (PID: 5980 cmdline: 'C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE' /automation -Embedding MD5: 5D6638F2C8F8571C593999C58866007E)
    • regsvr32.exe (PID: 4112 cmdline: regsvr32 -s ..\werty1.dll MD5: 426E7499F6A7346F0410DEAD0805586B)
    • regsvr32.exe (PID: 660 cmdline: regsvr32 -s ..\werty2.dll MD5: 426E7499F6A7346F0410DEAD0805586B)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Initial Sample

SourceRuleDescriptionAuthorStrings
app.xmlJoeSecurity_XlsWithMacro4Yara detected Xls With Macro 4.0Joe 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: regsvr32 -s ..\werty1.dll, CommandLine: regsvr32 -s ..\werty1.dll, CommandLine|base64offset|contains: ,, Image: C:\Windows\SysWOW64\regsvr32.exe, NewProcessName: C:\Windows\SysWOW64\regsvr32.exe, OriginalFileName: C:\Windows\SysWOW64\regsvr32.exe, ParentCommandLine: 'C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE' /automation -Embedding, ParentImage: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE, ParentProcessId: 5980, ProcessCommandLine: regsvr32 -s ..\werty1.dll, ProcessId: 4112

    Signature Overview

    Click to jump to signature section

    Show All Signature Results

    AV Detection:

    barindex
    Multi AV Scanner detection for domain / URLShow sources
    Source: forfacks.comVirustotal: Detection: 5%Perma Link
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEFile opened: C:\Windows\SysWOW64\MSVCR100.dllJump to behavior
    Source: unknownHTTPS traffic detected: 192.185.48.167:443 -> 192.168.2.4:49725 version: TLS 1.2
    Source: unknownHTTPS traffic detected: 192.185.113.120:443 -> 192.168.2.4:49727 version: TLS 1.2

    Software Vulnerabilities:

    barindex
    Document exploit detected (UrlDownloadToFile)Show sources
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXESection loaded: \KnownDlls32\WININET.dll origin: URLDownloadToFileAJump to behavior
    Document exploit detected (process start blacklist hit)Show sources
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess created: C:\Windows\SysWOW64\regsvr32.exe
    Source: global trafficDNS query: name: forfacks.com
    Source: global trafficTCP traffic: 192.168.2.4:49725 -> 192.185.48.167:443
    Source: global trafficTCP traffic: 192.168.2.4:49725 -> 192.185.48.167:443
    Source: Joe Sandbox ViewASN Name: UNIFIEDLAYER-AS-1US UNIFIEDLAYER-AS-1US
    Source: Joe Sandbox ViewJA3 fingerprint: 37f463bf4616ecd445d4a1937da06e19
    Source: unknownDNS traffic detected: queries for: forfacks.com
    Source: unknownNetwork traffic detected: HTTP traffic on port 49727 -> 443
    Source: unknownNetwork traffic detected: HTTP traffic on port 49725 -> 443
    Source: unknownNetwork traffic detected: HTTP traffic on port 443 -> 49727
    Source: unknownNetwork traffic detected: HTTP traffic on port 443 -> 49725
    Source: unknownHTTPS traffic detected: 192.185.48.167:443 -> 192.168.2.4:49725 version: TLS 1.2
    Source: unknownHTTPS traffic detected: 192.185.113.120:443 -> 192.168.2.4:49727 version: TLS 1.2

    System Summary:

    barindex
    Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)Show sources
    Source: Screenshot number: 4Screenshot OCR: Enable Content ' ' 14 15 / , 16 " 17 18 WHY I CANNOT OPEN THIS DOCUMENT ? 19 20 21 W You
    Found Excel 4.0 Macro with suspicious formulasShow sources
    Source: audit-367497006.xlsbInitial sample: EXEC
    Found abnormal large hidden Excel 4.0 Macro sheetShow sources
    Source: audit-367497006.xlsbInitial sample: Sheet size: 8595
    Source: audit-367497006.xlsbInitial sample: Sheet size: 7538
    Source: C:\Windows\SysWOW64\regsvr32.exeSection loaded: sfc.dllJump to behavior
    Source: C:\Windows\SysWOW64\regsvr32.exeSection loaded: sfc.dllJump to behavior
    Source: classification engineClassification label: mal76.expl.evad.winXLSB@5/9@2/2
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEFile created: C:\Users\user\Desktop\~$audit-367497006.xlsbJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEFile created: C:\Users\user\AppData\Local\Temp\{CA4A0570-2497-4229-BD1C-B788DE92E1D9} - OProcSessId.datJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEFile read: C:\Users\desktop.iniJump to behavior
    Source: C:\Windows\SysWOW64\regsvr32.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiersJump to behavior
    Source: unknownProcess created: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE 'C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE' /automation -Embedding
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess created: C:\Windows\SysWOW64\regsvr32.exe regsvr32 -s ..\werty1.dll
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess created: C:\Windows\SysWOW64\regsvr32.exe regsvr32 -s ..\werty2.dll
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess created: C:\Windows\SysWOW64\regsvr32.exe regsvr32 -s ..\werty1.dllJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess created: C:\Windows\SysWOW64\regsvr32.exe regsvr32 -s ..\werty2.dllJump to behavior
    Source: Window RecorderWindow detected: More than 3 window changes detected
    Source: audit-367497006.xlsbInitial sample: OLE zip file path = xl/media/image1.png
    Source: audit-367497006.xlsbInitial sample: OLE zip file path = xl/media/image2.png
    Source: audit-367497006.xlsbInitial sample: OLE zip file path = xl/media/image3.png
    Source: audit-367497006.xlsbInitial sample: OLE zip file path = xl/media/image4.png
    Source: audit-367497006.xlsbInitial sample: OLE zip file path = xl/media/image5.png
    Source: audit-367497006.xlsbInitial sample: OLE zip file path = xl/media/image6.png
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEKey opened: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\LanguageResources\EnabledEditingLanguagesJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEFile opened: C:\Windows\SysWOW64\MSVCR100.dllJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess created: C:\Windows\SysWOW64\regsvr32.exe regsvr32 -s ..\werty1.dll
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: FAILCRITICALERRORS | NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXEProcess information set: NOOPENFILEERRORBOXJump to behavior
    Source: regsvr32.exe, 00000001.00000002.659802132.0000000003400000.00000002.00000001.sdmp, regsvr32.exe, 00000002.00000002.661248559.0000000004640000.00000002.00000001.sdmpBinary or memory string: A Virtual Machine could not be started because Hyper-V is not installed.
    Source: regsvr32.exe, 00000001.00000002.659802132.0000000003400000.00000002.00000001.sdmp, regsvr32.exe, 00000002.00000002.661248559.0000000004640000.00000002.00000001.sdmpBinary or memory string: A communication protocol error has occurred between the Hyper-V Host and Guest Compute Service.
    Source: regsvr32.exe, 00000001.00000002.659802132.0000000003400000.00000002.00000001.sdmp, regsvr32.exe, 00000002.00000002.661248559.0000000004640000.00000002.00000001.sdmpBinary or memory string: The communication protocol version between the Hyper-V Host and Guest Compute Services is not supported.
    Source: regsvr32.exe, 00000001.00000002.659802132.0000000003400000.00000002.00000001.sdmp, regsvr32.exe, 00000002.00000002.661248559.0000000004640000.00000002.00000001.sdmpBinary or memory string: An unknown internal message was received by the Hyper-V Compute Service.
    Source: Yara matchFile source: app.xml, type: SAMPLE

    Mitre Att&ck Matrix

    Initial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionExfiltrationCommand and ControlNetwork EffectsRemote Service EffectsImpact
    Valid AccountsScripting2DLL Side-Loading1Process Injection1Regsvr321OS Credential DumpingSecurity Software Discovery1Remote ServicesData from Local SystemExfiltration Over Other Network MediumEncrypted Channel2Eavesdrop on Insecure Network CommunicationRemotely Track Device Without AuthorizationModify System Partition
    Default AccountsExploitation for Client Execution23Boot or Logon Initialization ScriptsDLL Side-Loading1Masquerading1LSASS MemoryFile and Directory Discovery1Remote Desktop ProtocolData from Removable MediaExfiltration Over BluetoothNon-Application Layer Protocol1Exploit SS7 to Redirect Phone Calls/SMSRemotely Wipe Data Without AuthorizationDevice Lockout
    Domain AccountsAt (Linux)Logon Script (Windows)Logon Script (Windows)Disable or Modify Tools1Security Account ManagerSystem Information Discovery2SMB/Windows Admin SharesData from Network Shared DriveAutomated ExfiltrationApplication Layer Protocol2Exploit SS7 to Track Device LocationObtain Device Cloud BackupsDelete Device Data
    Local AccountsAt (Windows)Logon Script (Mac)Logon Script (Mac)Process Injection1NTDSSystem Network Configuration DiscoveryDistributed Component Object ModelInput CaptureScheduled TransferProtocol ImpersonationSIM Card SwapCarrier Billing Fraud
    Cloud AccountsCronNetwork Logon ScriptNetwork Logon ScriptScripting2LSA SecretsRemote System DiscoverySSHKeyloggingData Transfer Size LimitsFallback ChannelsManipulate Device CommunicationManipulate App Store Rankings or Ratings
    Replication Through Removable MediaLaunchdRc.commonRc.commonDLL Side-Loading1Cached Domain CredentialsSystem Owner/User DiscoveryVNCGUI Input CaptureExfiltration Over C2 ChannelMultiband CommunicationJamming or Denial of ServiceAbuse Accessibility Features

    Behavior Graph

    Hide Legend

    Legend:

    • Process
    • Signature
    • Created File
    • DNS/IP Info
    • Is Dropped
    • Is Windows Process
    • Number of created Registry Values
    • Number of created Files
    • Visual Basic
    • Delphi
    • Java
    • .Net C# or VB.NET
    • C, C++ or other language
    • Is malicious
    • Internet

    Screenshots

    Thumbnails

    This section contains all screenshots as thumbnails, including those not shown in the slideshow.