General
Target

4ed7609cbb86ea0b7607b8a002e7f85b316903c3b6801240c9576aae8b3052ff.exe

Filesize

618KB

Completed

15-02-2022 13:33

Task

behavioral2

Score
10/10
MD5

353a21b3835ac7c17a82af79302d23cc

SHA1

03e96fc686cc15a0bb26186ecb4fe63e6b841c4b

SHA256

4ed7609cbb86ea0b7607b8a002e7f85b316903c3b6801240c9576aae8b3052ff

SHA256

fccacf9a70f9151f081caa6c2d32c2cee3fb3e3c95ce10ee5c632f3007f54c5513b024fc10c9abc9eb9c7703e197360d569040ec3e47d182a123079cba0743dc

Malware Config

Extracted

Family

vidar

Version

41.7

Botnet

937

C2

https://mas.to/@lenka51

Attributes
profile_id
937
Signatures 11

Filter: none

Discovery
  • Suspicious use of NtCreateProcessExOtherParentProcess
    WerFault.exe

    Reported IOCs

    descriptionpidprocesstarget process
    PID 1576 created 34081576WerFault.exe4ed7609cbb86ea0b7607b8a002e7f85b316903c3b6801240c9576aae8b3052ff.exe
  • Vidar

    Description

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer

    Tags

    Reported IOCs

    resourceyara_rule
    behavioral2/memory/3408-131-0x00000000022A0000-0x0000000002376000-memory.dmpfamily_vidar
    behavioral2/memory/3408-132-0x0000000000400000-0x00000000004D9000-memory.dmpfamily_vidar
  • Drops file in Windows directory
    svchost.exeTiWorker.exeWerFault.exe

    Reported IOCs

    descriptioniocprocess
    File opened for modificationC:\Windows\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\DeliveryOptimization\State\keyValueLKG.datsvchost.exe
    File opened for modificationC:\Windows\Logs\CBS\CBS.logTiWorker.exe
    File opened for modificationC:\Windows\WinSxS\pending.xmlTiWorker.exe
    File createdC:\Windows\AppCompat\Programs\Amcache.hve.tmpWerFault.exe
  • Program crash
    WerFault.exe

    Reported IOCs

    pidpid_targetprocesstarget process
    35443408WerFault.exe4ed7609cbb86ea0b7607b8a002e7f85b316903c3b6801240c9576aae8b3052ff.exe
  • Checks processor information in registry
    WerFault.exeMusNotifyIcon.exe

    Description

    Processor information is often read in order to detect sandboxing environments.

    TTPs

    Query RegistrySystem Information Discovery

    Reported IOCs

    descriptioniocprocess
    Key opened\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0WerFault.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHzWerFault.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameStringWerFault.exe
    Key opened\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0MusNotifyIcon.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHzMusNotifyIcon.exe
  • Enumerates system info in registry
    WerFault.exe

    TTPs

    Query RegistrySystem Information Discovery

    Reported IOCs

    descriptioniocprocess
    Key opened\REGISTRY\MACHINE\Hardware\Description\System\BIOSWerFault.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKUWerFault.exe
  • Modifies data under HKEY_USERS
    svchost.exe

    Reported IOCs

    descriptioniocprocess
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "1"svchost.exe
    Key created\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Configsvchost.exe
    Key created\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Settingssvchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DownloadMode_BackCompat = "1"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadMonthlyInternetBytes = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyLanBytes = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyGroupBytes = "0"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\Geo_EndpointFullUri = "https://geo.prod.do.dsp.mp.microsoft.com/geo"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UplinkBps = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UplinkUsageBps = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadCount = "0"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "2.189752"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyInternetBytes = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyLinkLocalBytes = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PeerInfoCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\LinkLocalConnectionCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadRatePct = "100"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\KVFileExpirationTime = "132895819226375028"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CDNConnectionCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\LANConnectionCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthlyUploadRestriction = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4408"svchost.exe
    Key created\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimizationsvchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrCnt = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthID = "2"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CacheSizeBytes = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadCount = "0"svchost.exe
    Key created\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usagesvchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrBps = "0"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\GeoVersion_EndpointFullUri = "https://geover.prod.do.dsp.mp.microsoft.com/geoversion"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkUsageBps = "0"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "14.279350"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCdnBytes = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\BkDownloadRatePct = "45"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4184"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.000000"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DODownloadMode = "1"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadMonthlyLanBytes = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCacheHostBytes = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkBps = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkCnt = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\InternetConnectionCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadPendingCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\GroupConnectionCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkBps = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\FrDownloadRatePct = "90"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadPendingCount = "0"svchost.exe
  • Suspicious behavior: EnumeratesProcesses
    WerFault.exe

    Reported IOCs

    pidprocess
    3544WerFault.exe
    3544WerFault.exe
  • Suspicious use of AdjustPrivilegeToken
    TiWorker.exe

    Reported IOCs

    descriptionpidprocess
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
    Token: SeRestorePrivilege3516TiWorker.exe
    Token: SeSecurityPrivilege3516TiWorker.exe
    Token: SeBackupPrivilege3516TiWorker.exe
  • Suspicious use of WriteProcessMemory
    WerFault.exe

    Reported IOCs

    descriptionpidprocesstarget process
    PID 1576 wrote to memory of 34081576WerFault.exe4ed7609cbb86ea0b7607b8a002e7f85b316903c3b6801240c9576aae8b3052ff.exe
    PID 1576 wrote to memory of 34081576WerFault.exe4ed7609cbb86ea0b7607b8a002e7f85b316903c3b6801240c9576aae8b3052ff.exe
Processes 6
  • C:\Users\Admin\AppData\Local\Temp\4ed7609cbb86ea0b7607b8a002e7f85b316903c3b6801240c9576aae8b3052ff.exe
    "C:\Users\Admin\AppData\Local\Temp\4ed7609cbb86ea0b7607b8a002e7f85b316903c3b6801240c9576aae8b3052ff.exe"
    PID:3408
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3408 -s 1040
      Drops file in Windows directory
      Program crash
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious behavior: EnumeratesProcesses
      PID:3544
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    Checks processor information in registry
    PID:364
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k NetworkService -p
    Drops file in Windows directory
    Modifies data under HKEY_USERS
    PID:3244
  • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
    C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
    Drops file in Windows directory
    Suspicious use of AdjustPrivilegeToken
    PID:3516
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3408 -ip 3408
    Suspicious use of NtCreateProcessExOtherParentProcess
    Suspicious use of WriteProcessMemory
    PID:1576
Network
MITRE ATT&CK Matrix
Collection
    Command and Control
      Credential Access
        Defense Evasion
          Execution
            Exfiltration
              Impact
                Initial Access
                  Lateral Movement
                    Persistence
                      Privilege Escalation
                        Replay Monitor
                        00:00 00:00
                        Downloads
                        • memory/3408-130-0x0000000002210000-0x000000000228C000-memory.dmp

                        • memory/3408-131-0x00000000022A0000-0x0000000002376000-memory.dmp

                        • memory/3408-132-0x0000000000400000-0x00000000004D9000-memory.dmp