Analysis

  • max time kernel
    95s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-11-2024 16:20

General

  • Target

    1YMSykc.exe

  • Size

    1.3MB

  • MD5

    47daa94b04ff038ade5342c9de2d93e7

  • SHA1

    e8918b3c526002213b94b5d497d63d2b98f6c354

  • SHA256

    7d75b643c71063ea63b7cf241bf138c5546ac59399456776938ae1dee6dcfd0a

  • SHA512

    abbfb1417edfde19694759d63ae175192ce180e937b443e4b485c32eee22389f319a618f9883934a6f878fd5d6530ab7b1f6058f616e79906f6adb8bb9115bf2

  • SSDEEP

    24576:xuDXTIGaPhEYzUzA0nOLYuVuoWIT/ntnA0zggkJboApVzHLEQrdCNYffzHLS:kDjlabwz9OLYdm9zItRnzzG4fzu

Malware Config

Signatures

  • Detect Umbral payload 4 IoCs
  • Umbral

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

  • Umbral family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 8 IoCs

    Using powershell.exe command.

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

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

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

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 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).

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 4 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Detects videocard installed 1 TTPs 2 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 22 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1YMSykc.exe
    "C:\Users\Admin\AppData\Local\Temp\1YMSykc.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2760
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe"
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3928
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:4464
      • C:\Windows\SYSTEM32\attrib.exe
        "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe"
        3⤵
        • Views/modifies file attributes
        PID:3104
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1752
      • 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⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1020
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1692
      • 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:4892
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3496
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" computersystem get totalphysicalmemory
        3⤵
          PID:5060
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          3⤵
            PID:4288
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            PID:660
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic" path win32_VideoController get name
            3⤵
            • Detects videocard installed
            PID:1808
          • C:\Windows\SYSTEM32\cmd.exe
            "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe" && pause
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Suspicious use of WriteProcessMemory
            PID:4748
            • C:\Windows\system32\PING.EXE
              ping localhost
              4⤵
              • System Network Configuration Discovery: Internet Connection Discovery
              • Runs ping.exe
              PID:3568
        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\CcC.exe
          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\CcC.exe"
          2⤵
          • Drops file in Drivers directory
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:5084
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" csproduct get uuid
            3⤵
              PID:1316
            • C:\Windows\SYSTEM32\attrib.exe
              "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\RarSFX0\CcC.exe"
              3⤵
              • Views/modifies file attributes
              PID:1028
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\RarSFX0\CcC.exe'
              3⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:4824
            • 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⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:64
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
              3⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:4400
            • 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
              PID:936
            • C:\Windows\System32\Wbem\wmic.exe
              "wmic.exe" os get Caption
              3⤵
                PID:3000
              • C:\Windows\System32\Wbem\wmic.exe
                "wmic.exe" computersystem get totalphysicalmemory
                3⤵
                  PID:2784
                • C:\Windows\System32\Wbem\wmic.exe
                  "wmic.exe" csproduct get uuid
                  3⤵
                    PID:4212
                  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
                    3⤵
                    • Command and Scripting Interpreter: PowerShell
                    • Suspicious behavior: EnumeratesProcesses
                    PID:5076
                  • C:\Windows\System32\Wbem\wmic.exe
                    "wmic" path win32_VideoController get name
                    3⤵
                    • Detects videocard installed
                    PID:2324
                  • C:\Windows\SYSTEM32\cmd.exe
                    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\RarSFX0\CcC.exe" && pause
                    3⤵
                    • System Network Configuration Discovery: Internet Connection Discovery
                    • Suspicious use of WriteProcessMemory
                    PID:4356
                    • C:\Windows\system32\PING.EXE
                      ping localhost
                      4⤵
                      • System Network Configuration Discovery: Internet Connection Discovery
                      • Runs ping.exe
                      PID:1952

              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

                64B

                MD5

                56ab88e507fc45dd3fc520a9fef39230

                SHA1

                31aeaa9b52c951b71d1d12e18d4c7013e7d2860d

                SHA256

                3510829b7739f7fdd71ea845ef2ee0a74224503889b373e53c391493abccc239

                SHA512

                5427e725e7ae3480eb12b9069e9a7cd8c7d22d352d5255b64c3e27a36a7332e1a036b502bf6276d64dfdda1b6eecfaf6e245c7daad3a37446de891c37b578e13

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

                Filesize

                944B

                MD5

                96ff1ee586a153b4e7ce8661cabc0442

                SHA1

                140d4ff1840cb40601489f3826954386af612136

                SHA256

                0673399a2f37c89d455e8658c4d30b9248bff1ea47ba40957588e2bc862976e8

                SHA512

                3404370d0edb4ead4874ce68525dc9bcbc6008003682646e331bf43a06a24a467ace7eff5be701a822d74c7e065d0f6a0ba0e3d6bc505d34d0189373dcacb569

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

                Filesize

                948B

                MD5

                6a29e9f9eb72c3bffbb054cd27e3ceea

                SHA1

                d38f7c2ad68dcf1d24deca9792256ff53d5218b2

                SHA256

                7a9f831f96b9e4843751dea3ed57ee11d70bb83a5970ddf9d6bd440f4def442c

                SHA512

                b4826f172c6ac60ad17412a634987c45640b1b8fe03aecba26510ae224685bcd571bc4b131724036e2b502b3a8198fb69414be8c72e46f833f0601a15d313430

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

                Filesize

                1KB

                MD5

                548dd08570d121a65e82abb7171cae1c

                SHA1

                1a1b5084b3a78f3acd0d811cc79dbcac121217ab

                SHA256

                cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

                SHA512

                37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

                Filesize

                1KB

                MD5

                05f6f27c298dbb70ed7a51b844ada2a4

                SHA1

                d498076720a0ce3efe3c5afa9d18155f73f42b7b

                SHA256

                df90c1970460fa1b165594fb1b5d2ac3b2c6df11118bef7d6cc97972987809a5

                SHA512

                4dce5fe2d21fb57fd05d0139c3b29d887e62884fd3128e1d6718a61e98eaaca7ea6ed45accb1fd761323671bb159ac911c520fd3bd8e71d027ca69308984d7e6

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

                Filesize

                944B

                MD5

                3a6bad9528f8e23fb5c77fbd81fa28e8

                SHA1

                f127317c3bc6407f536c0f0600dcbcf1aabfba36

                SHA256

                986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

                SHA512

                846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

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

                Filesize

                948B

                MD5

                df6c4e5c3091c14551e6c92f07717617

                SHA1

                1ea87111035496c1b2b74cef8b5c62d00ac072c9

                SHA256

                b79dc75372707ff84a643a9e4cff6fad2d1a936b54d458088850c62c96e2f231

                SHA512

                ab861efd0ff28a4bae3513a884d5b00c1b68d8f0bd54a00428bbb65a6954f8778e8f5300362025265251cb425c5ed77608b10776f382c3b392916ae46e38db35

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

                Filesize

                1KB

                MD5

                276798eeb29a49dc6e199768bc9c2e71

                SHA1

                5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

                SHA256

                cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

                SHA512

                0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

                Filesize

                1KB

                MD5

                6317adf4fbc43ea2fd68861fafd57155

                SHA1

                6b87c718893c83c6eed2767e8d9cbc6443e31913

                SHA256

                c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

                SHA512

                17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

              • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe

                Filesize

                492KB

                MD5

                4e6a63942f5205cc84a200ebc4aebc2e

                SHA1

                19ff74550c41a562e1b2b9cbe3c67608f685aefc

                SHA256

                fef58748adf375c23f2604f9c422f353a7fc969ca32bab8bf965b2648bf178d4

                SHA512

                34eb34a4358cfdf19563616659915ef0a895cbf1d37181fa4c003c1d904744c0ce664f56a287b2f2eb631e0f73af90e08b252d4bd090fe5054ed14890c251729

              • C:\Users\Admin\AppData\Local\Temp\RarSFX0\CcC.exe

                Filesize

                492KB

                MD5

                9e1d91acd2ee7f84fdb7374b66b28cf9

                SHA1

                36701c1a18a9fafe10e3d8fa2318453d7d193d5f

                SHA256

                fe47fabeb2de30c850fda2ee6f5af68de6197e84f748d2d81855db4a27755703

                SHA512

                eaf5e72e466dd31083156ad71f73bfa474219c2b4a753ec2ef1f7514ac3706a8d20018d07432a9ef68779300b8f13378a767625d8ea8722a1dab12ba91c0514a

              • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mj52zcbx.wvs.ps1

                Filesize

                60B

                MD5

                d17fe0a3f47be24a6453e9ef58c94641

                SHA1

                6ab83620379fc69f80c0242105ddffd7d98d5d9d

                SHA256

                96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                SHA512

                5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

                Filesize

                2KB

                MD5

                4028457913f9d08b06137643fe3e01bc

                SHA1

                a5cb3f12beaea8194a2d3d83a62bdb8d558f5f14

                SHA256

                289d433902418aaf62e7b96b215ece04fcbcef2457daf90f46837a4d5090da58

                SHA512

                c8e1eef90618341bbde885fd126ece2b1911ca99d20d82f62985869ba457553b4c2bf1e841fd06dacbf27275b3b0940e5a794e1b1db0fd56440a96592362c28b

              • memory/1752-21-0x00000255A6510000-0x00000255A6532000-memory.dmp

                Filesize

                136KB

              • memory/3928-84-0x000001EC2E240000-0x000001EC2E24A000-memory.dmp

                Filesize

                40KB

              • memory/3928-105-0x000001EC2E1D0000-0x000001EC2E1F7000-memory.dmp

                Filesize

                156KB

              • memory/3928-106-0x00007FFA386A0000-0x00007FFA39161000-memory.dmp

                Filesize

                10.8MB

              • memory/3928-85-0x000001EC48520000-0x000001EC48532000-memory.dmp

                Filesize

                72KB

              • memory/3928-46-0x000001EC48310000-0x000001EC48360000-memory.dmp

                Filesize

                320KB

              • memory/3928-45-0x000001EC484A0000-0x000001EC48516000-memory.dmp

                Filesize

                472KB

              • memory/3928-47-0x000001EC2E1A0000-0x000001EC2E1BE000-memory.dmp

                Filesize

                120KB

              • memory/3928-18-0x00007FFA386A0000-0x00007FFA39161000-memory.dmp

                Filesize

                10.8MB

              • memory/3928-17-0x000001EC2DC90000-0x000001EC2DD12000-memory.dmp

                Filesize

                520KB

              • memory/3928-16-0x00007FFA386A3000-0x00007FFA386A5000-memory.dmp

                Filesize

                8KB

              • memory/5084-117-0x000001C517820000-0x000001C5178A2000-memory.dmp

                Filesize

                520KB