General
Target

c7ad7dc565687b2fe2b2652ffbd135188acb4eef29c2e0d72a116bd988c1e40d.exe

Filesize

675KB

Completed

15-02-2022 06:15

Task

behavioral2

Score
10/10
MD5

cef76d7fba522e19ac03269b6275ff3f

SHA1

81cbb61d06fcd512081a5dac97a7865d98d7a22b

SHA256

c7ad7dc565687b2fe2b2652ffbd135188acb4eef29c2e0d72a116bd988c1e40d

SHA512

e4728e26ab451ec452fbb5b61fbc7efe4c7e3c138cb91ed2a4bb75a339bf2ee1cdee9f7fa0c03fb398fea3c6dd87c5075bff0095b6e55811198865550bdab33a

Malware Config

Extracted

Family

vidar

Version

48.1

Botnet

937

C2

https://koyu.space/@rspich

Attributes
profile_id
937
Signatures 11

Filter: none

Discovery
  • Suspicious use of NtCreateProcessExOtherParentProcess
    WerFault.exe

    Reported IOCs

    descriptionpidprocesstarget process
    PID 544 created 2168544WerFault.exec7ad7dc565687b2fe2b2652ffbd135188acb4eef29c2e0d72a116bd988c1e40d.exe
  • Vidar

    Description

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer

    Tags

    Reported IOCs

    resourceyara_rule
    behavioral2/memory/2168-131-0x00000000022C0000-0x0000000002395000-memory.dmpfamily_vidar
    behavioral2/memory/2168-132-0x0000000000400000-0x00000000004D8000-memory.dmpfamily_vidar
  • Drops file in Windows directory
    TiWorker.exesvchost.exe

    Reported IOCs

    descriptioniocprocess
    File opened for modificationC:\Windows\WinSxS\pending.xmlTiWorker.exe
    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
  • Program crash
    WerFault.exe

    Reported IOCs

    pidpid_targetprocesstarget process
    8282168WerFault.exec7ad7dc565687b2fe2b2652ffbd135188acb4eef29c2e0d72a116bd988c1e40d.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\PeerInfoCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "0"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.013172"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadPendingCount = "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\DownloadMonthlyLinkLocalBytes = "0"svchost.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\DownlinkBps = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkUsageBps = "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\UplinkUsageBps = "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\UploadMonthlyInternetBytes = "0"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\DownloadMonthlyCacheHostBytes = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\KVFileExpirationTime = "132895556354157271"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\GroupConnectionCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadCount = "0"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\DownloadMonthlyRateFrBps = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkBps = "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\MemoryUsageKB = "4408"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\DownloadMonthlyRateBkCnt = "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\Usage\NormalDownloadCount = "0"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "6.617449"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4112"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\BkDownloadRatePct = "45"svchost.exe
    Key created\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimizationsvchost.exe
    Key created\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Settingssvchost.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\SwarmCount = "1"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\InternetConnectionCount = "0"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "4.545609"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\DownloadMonthlyGroupBytes = "0"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\LANConnectionCount = "0"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\FrDownloadRatePct = "90"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4056"svchost.exe
    Key created\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Configsvchost.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\DownloadMonthlyInternetBytes = "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\NormalDownloadPendingCount = "0"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "10.008429"svchost.exe
  • Suspicious behavior: EnumeratesProcesses
    WerFault.exe

    Reported IOCs

    pidprocess
    828WerFault.exe
    828WerFault.exe
  • Suspicious use of AdjustPrivilegeToken
    TiWorker.exe

    Reported IOCs

    descriptionpidprocess
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
    Token: SeRestorePrivilege4072TiWorker.exe
    Token: SeSecurityPrivilege4072TiWorker.exe
    Token: SeBackupPrivilege4072TiWorker.exe
  • Suspicious use of WriteProcessMemory
    WerFault.exe

    Reported IOCs

    descriptionpidprocesstarget process
    PID 544 wrote to memory of 2168544WerFault.exec7ad7dc565687b2fe2b2652ffbd135188acb4eef29c2e0d72a116bd988c1e40d.exe
    PID 544 wrote to memory of 2168544WerFault.exec7ad7dc565687b2fe2b2652ffbd135188acb4eef29c2e0d72a116bd988c1e40d.exe
Processes 6
  • C:\Users\Admin\AppData\Local\Temp\c7ad7dc565687b2fe2b2652ffbd135188acb4eef29c2e0d72a116bd988c1e40d.exe
    "C:\Users\Admin\AppData\Local\Temp\c7ad7dc565687b2fe2b2652ffbd135188acb4eef29c2e0d72a116bd988c1e40d.exe"
    PID:2168
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2168 -s 1044
      Program crash
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious behavior: EnumeratesProcesses
      PID:828
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    Checks processor information in registry
    PID:1900
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k NetworkService -p
    Drops file in Windows directory
    Modifies data under HKEY_USERS
    PID:2900
  • 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:4072
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2168 -ip 2168
    Suspicious use of NtCreateProcessExOtherParentProcess
    Suspicious use of WriteProcessMemory
    PID:544
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/2168-130-0x0000000002240000-0x00000000022BB000-memory.dmp

                        • memory/2168-131-0x00000000022C0000-0x0000000002395000-memory.dmp

                        • memory/2168-132-0x0000000000400000-0x00000000004D8000-memory.dmp