General
Target

2445015a38add6e9f4e917b8057e57cd59c5361aed5ddec6b6f3ac64c0cda258.exe

Filesize

708KB

Completed

15-02-2022 14:59

Task

behavioral2

Score
10/10
MD5

9c18b1d03dfef684145efdaf64ef2c25

SHA1

8a038d5a59ec994afdb558658c5ee1f92d690288

SHA256

2445015a38add6e9f4e917b8057e57cd59c5361aed5ddec6b6f3ac64c0cda258

SHA512

defec70294504707ccc36317d5875e6462e1db0cb75b9bbd68595755aadac41daac416ab4a49abee6ef3a06a026e48d03fd8ff745d96500cb5674c70d751d04f

Malware Config

Extracted

Family

vidar

Version

48.6

Botnet

937

C2

https://mastodon.online/@valhalla

https://koyu.space/@valhalla

Attributes
profile_id
937
Signatures 6

Filter: none

Discovery
  • Vidar

    Description

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer

    Tags

    Reported IOCs

    resourceyara_rule
    behavioral2/memory/2520-132-0x0000000003D80000-0x0000000003E55000-memory.dmpfamily_vidar
    behavioral2/memory/2520-133-0x0000000000400000-0x00000000004D8000-memory.dmpfamily_vidar
  • Drops file in Windows directory
    svchost.exeTiWorker.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
  • Checks processor information in registry
    MusNotifyIcon.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\0MusNotifyIcon.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHzMusNotifyIcon.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\MemoryUsageKB = "4172"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\DownloadMonthlyInternetBytes = "0"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\Config\DODownloadMode = "1"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\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 (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
    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\CDNConnectionCount = "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\PriorityDownloadCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4372"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\DownloadMonthlyCacheHostBytes = "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\UplinkBps = "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\DownloadMonthlyGroupBytes = "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\BkDownloadRatePct = "45"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\NormalDownloadPendingCount = "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\MemoryUsageKB = "4216"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.520231"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\LANConnectionCount = "0"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\GroupConnectionCount = "0"svchost.exe
    Set value (str)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.037092"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\Usage\DownloadMonthlyRateFrCnt = "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\MonthID = "2"svchost.exe
    Set value (int)\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\KVFileExpirationTime = "132895871233894756"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\InternetConnectionCount = "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\PriorityDownloadPendingCount = "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\UploadRatePct = "100"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\SwarmCount = "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
  • Suspicious use of AdjustPrivilegeToken
    TiWorker.exe

    Reported IOCs

    descriptionpidprocess
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
    Token: SeRestorePrivilege1144TiWorker.exe
    Token: SeSecurityPrivilege1144TiWorker.exe
    Token: SeBackupPrivilege1144TiWorker.exe
Processes 4
  • C:\Users\Admin\AppData\Local\Temp\2445015a38add6e9f4e917b8057e57cd59c5361aed5ddec6b6f3ac64c0cda258.exe
    "C:\Users\Admin\AppData\Local\Temp\2445015a38add6e9f4e917b8057e57cd59c5361aed5ddec6b6f3ac64c0cda258.exe"
    PID:2520
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    Checks processor information in registry
    PID:3672
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k NetworkService -p
    Drops file in Windows directory
    Modifies data under HKEY_USERS
    PID:3016
  • 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:1144
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/2520-130-0x00000000021BD000-0x0000000002239000-memory.dmp

                        • memory/2520-131-0x00000000021BD000-0x0000000002239000-memory.dmp

                        • memory/2520-132-0x0000000003D80000-0x0000000003E55000-memory.dmp

                        • memory/2520-133-0x0000000000400000-0x00000000004D8000-memory.dmp