Analysis

  • max time kernel
    149s
  • max time network
    117s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    05/08/2026, 18:24

General

  • Target
    Epsilon.Updater.Install.exe
  • Size 27KB
  • Sample260805-w11e2stcnd
  • SHA256 976ab0de3eb1754230e6cb1fe49bddc55cdd48da0553745a1bc9ca2e959e32af
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
6/10

Malware Config

Signatures

  • Downloads MZ/PE file 1 IoCs
  • Drops file in System32 directory 8 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Executes dropped EXE 8 IoCs
  • Loads dropped DLL 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Install.exe
    "C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Install.exe"
    1⤵
      PID:2420
    • C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Service.exe
      C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Service.exe
      1⤵
      • Downloads MZ/PE file
      • Drops file in System32 directory
      • Modifies data under HKEY_USERS
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:5316
      • C:\Users\Admin\AppData\Local\Temp\Repositories\$eUpdater\Setup.24.3.7.0.exe
        "C:\Users\Admin\AppData\Local\Temp\Repositories\$eUpdater\Setup.24.3.7.0.exe" /S /D=C:\Users\Admin\AppData\Local\Temp\
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:780
        • C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Uninstall.exe
          "C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Uninstall.exe" /ProductName="Epsilon Updater" /ProductVersion=${VERSION_SHORT}
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4560
        • C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Service.exe
          "C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Service.exe" /INSTALL
          3⤵
          • Executes dropped EXE
          PID:5184
        • C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Install.exe
          "C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Install.exe" /ProductName="Epsilon Updater" /ProductVersion=${VERSION_SHORT}
          3⤵
          • Executes dropped EXE
          • Modifies data under HKEY_USERS
          PID:4876
        • C:\Windows\TEMP\vc_redist.x86.exe
          "C:\Windows\TEMP\vc_redist.x86.exe" /passive /norestart
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:3668
          • C:\Windows\TEMP\vc_redist.x86.exe
            "C:\Windows\TEMP\vc_redist.x86.exe" /passive /norestart -burn.unelevated BurnPipe.{62643FFC-E502-4847-BF20-72DF8E800F5A} {9FF2FC78-F089-4828-ABB6-5FB5D9DB4B8D} 3668
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • System Location Discovery: System Language Discovery
            PID:5100
        • C:\Windows\TEMP\vc_redist.x64.exe
          "C:\Windows\TEMP\vc_redist.x64.exe" /passive /norestart
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2528
          • C:\Windows\TEMP\vc_redist.x64.exe
            "C:\Windows\TEMP\vc_redist.x64.exe" /passive /norestart -burn.unelevated BurnPipe.{7BC1996C-CA0E-448E-8746-9B0C8A4DDB27} {81B2DFC6-020F-4701-81E7-B56F5E0E4DC7} 2528
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • System Location Discovery: System Language Discovery
            PID:5220
    • C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Service.exe
      C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Service.exe
      1⤵
      • Executes dropped EXE
      • Modifies data under HKEY_USERS
      • Suspicious use of AdjustPrivilegeToken
      PID:5736

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          749b2fc3-1dd3-4f37-b14c-e6aa41852733.xml

          • Path C:\Users\Admin\AppData\Local\Temp\749b2fc3-1dd3-4f37-b14c-e6aa41852733.xml
          • Size 248B
          • SHA256 8ef3aa45492fbf80c6f370ac4ab8fd7a68a0d3b871117bfc2207f6d66e1af29e
          • MD5 SHA1 SHA512 TLSH

          Epsilon.Updater.Install.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Install.exe
          • Size 27KB
          • SHA256 976ab0de3eb1754230e6cb1fe49bddc55cdd48da0553745a1bc9ca2e959e32af
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Epsilon.Updater.Libs.dll

          • Path C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Libs.dll
          • Size 273KB
          • SHA256 fd0198644db645a44f4118d63edbdc4c2b60b2d2d9ad38c2a0a1bb2bc697e5a6
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Epsilon.Updater.Service.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Service.exe
          • Size 30KB
          • SHA256 1692fbf9e26db5449ed4245e3d082c3a5511f5640b66335001eb350823b3743c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Epsilon.Updater.Service.exe.config

          • Path C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.Service.exe.config
          • Size 970B
          • SHA256 70d09b63a1585387a68b93d8bd378d6fd7dea2028c3de1b36a3b1464c8375433
          • MD5 SHA1 SHA512 TLSH

          Epsilon.Updater.UI.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Epsilon.Updater.UI.exe
          • Size 1.0MB
          • SHA256 12614e10ce4f2e366d78e84792132aa42aae3e820985ef8bc5128d0f409d3839
          • MD5 SHA1 SHA512 SSDEEP TLSH

          log.txt

          • Path C:\Users\Admin\AppData\Local\Temp\Logs\log.txt
          • Size 3KB
          • SHA256 efbf0c389d7b079f33255cd52cf67796b3478b37b641fb4b8567cf67585da714
          • MD5 SHA1 SHA512 TLSH

          NLog.config

          • Path C:\Users\Admin\AppData\Local\Temp\NLog.config
          • Size 670B
          • SHA256 168bac05fc94f3c4ce3f2998b1013a7b1719679325e4c668d4024c9f549fdb38
          • MD5 SHA1 SHA512 TLSH

          NLog.dll

          • Path C:\Users\Admin\AppData\Local\Temp\NLog.dll
          • Size 853KB
          • SHA256 151de9860bfc5c0f6ff3263a308abf44200ca9d5d5876ec08e9f4c6a8afa8e83
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Newtonsoft.Json.dll

          • Path C:\Users\Admin\AppData\Local\Temp\Newtonsoft.Json.dll
          • Size 683KB
          • SHA256 7f912b28a07c226e0be3acfb2f57f050538aba0100fa1f0bf2c39f1a1f1da814
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Setup.24.3.7.0.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Repositories\$eUpdater\Setup.24.3.7.0.exe
          • Size 29.2MB
          • SHA256 d2cb2b1b89dfeb565e0ae3ed1cba7d00186eadf3820f330cf03d0bb4231ac61a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          data.xml

          • Path C:\Users\Admin\AppData\Local\Temp\UninstallInstall\data.xml
          • Size 2KB
          • SHA256 6daa63e1eaddf5544f294e4f7890c5f8d73bf9cf177dade2983b5181bdae1db1
          • MD5 SHA1 SHA512 TLSH

          eb9eb5a1-33a8-4cc3-bd71-da4de845510e.xml

          • Path C:\Users\Admin\AppData\Local\Temp\eb9eb5a1-33a8-4cc3-bd71-da4de845510e.xml
          • Size 2KB
          • SHA256 6d4bfcb450627baecf55676ccf5489545d9e14b82bc32dd23f2775e51ebe95f4
          • MD5 SHA1 SHA512 TLSH

          DotNetChecker.dll

          • Path C:\Windows\Temp\nsm5403.tmp\DotNetChecker.dll
          • Size 84KB
          • SHA256 39c43d67f546fc898f7406d213b73dcb1bc30fc811ddfa3a02b6b50c29d11f91
          • MD5 SHA1 SHA512 SSDEEP TLSH

          System.dll

          • Path C:\Windows\Temp\nsm5403.tmp\System.dll
          • Size 12KB
          • SHA256 8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          vc_redist.x64.exe

          • Path C:\Windows\Temp\vc_redist.x64.exe
          • Size 13.9MB
          • SHA256 5eea714e1f22f1875c1cb7b1738b0c0b1f02aec5ecb95f0fdb1c5171c6cd93a3
          • MD5 SHA1 SHA512 SSDEEP TLSH

          vc_redist.x86.exe

          • Path C:\Windows\Temp\vc_redist.x86.exe
          • Size 13.1MB
          • SHA256 fdd1e1f0dcae2d0aa0720895eff33b927d13076e64464bb7c7e5843b7667cd14
          • MD5 SHA1 SHA512 SSDEEP TLSH

          logo.png

          • Path C:\Windows\Temp\{74d0e5db-b326-4dae-a6b2-445b9de1836e}\.ba1\logo.png
          • Size 1KB
          • SHA256 335a256d4779ec5dcf283d007fb56fd8211bbcaf47dcd70fe60ded6a112744ef
          • MD5 SHA1 SHA512 TLSH

          wixstdba.dll

          • Path C:\Windows\Temp\{74d0e5db-b326-4dae-a6b2-445b9de1836e}\.ba1\wixstdba.dll
          • Size 118KB
          • SHA256 a9295ad4e909f979e2b6cb2b2495c3d35c8517e689cd64a918c690e17b49078b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          18E6B4A57A6BC7EC9B861CDF2D6D0D02_C3B142D2C5374581DC2FDFFDEDBDEDDB

          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\18E6B4A57A6BC7EC9B861CDF2D6D0D02_C3B142D2C5374581DC2FDFFDEDBDEDDB
          • Size 765B
          • SHA256 ff16419fed5b468514c9fa548fb1a017f2244f560292aea965c8a1d3f7fa45b9
          • MD5 SHA1 SHA512 TLSH

          AEACCDA8653DD8D7B2EA32F21D15D44F_200E34A691ABFCDB8F8FB0E4F494DDCC

          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\AEACCDA8653DD8D7B2EA32F21D15D44F_200E34A691ABFCDB8F8FB0E4F494DDCC
          • Size 638B
          • SHA256 cb71a3fc37bbdee9b90a3810bf528b76c8bf8e89626cd3c4140c870cb5fb3faa
          • MD5 SHA1 SHA512 TLSH

          B2FAF7692FD9FFBD64EDE317E42334BA_93702E680A5530C052C8D2BA33A2225F

          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_93702E680A5530C052C8D2BA33A2225F
          • Size 1KB
          • SHA256 a0d6ce27684a757d37eab3719f249b191a0479b5e63a1ec2be4bd6779ff85ad4
          • MD5 SHA1 SHA512 TLSH

          18E6B4A57A6BC7EC9B861CDF2D6D0D02_C3B142D2C5374581DC2FDFFDEDBDEDDB

          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\18E6B4A57A6BC7EC9B861CDF2D6D0D02_C3B142D2C5374581DC2FDFFDEDBDEDDB
          • Size 484B
          • SHA256 e23ca59796ed098423accd6f5cefac0743bc4fe952effded102becf95de8203a
          • MD5 SHA1 SHA512 TLSH

          AEACCDA8653DD8D7B2EA32F21D15D44F_200E34A691ABFCDB8F8FB0E4F494DDCC

          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\AEACCDA8653DD8D7B2EA32F21D15D44F_200E34A691ABFCDB8F8FB0E4F494DDCC
          • Size 484B
          • SHA256 bf6b5cbb69cd8d3af410f9ebb1aa55e0b00ca0de42be80cb087eff1540c9a49a
          • MD5 SHA1 SHA512 TLSH

          B2FAF7692FD9FFBD64EDE317E42334BA_93702E680A5530C052C8D2BA33A2225F

          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_93702E680A5530C052C8D2BA33A2225F
          • Size 482B
          • SHA256 359dc854ed08a185acd716ff2c7cb84200bb97ee6cdba109c8bfe209da247f24
          • MD5 SHA1 SHA512 TLSH

          memory/2420-3-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/2420-4-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/2420-32-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/2420-2-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/2420-1-0x00000184F5B40000-0x00000184F5B4A000-memory.dmp

          memory/2420-8-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/2420-11-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/2420-21-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/2420-0-0x00007FF9CF09F000-0x00007FF9CF0A0000-memory.dmp

          memory/4560-70-0x000001B978D60000-0x000001B978D68000-memory.dmp

          memory/5316-30-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/5316-74-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/5316-73-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/5316-69-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/5316-37-0x000001F3E6830000-0x000001F3E6852000-memory.dmp

          memory/5316-36-0x000001F3E6C00000-0x000001F3E6CB0000-memory.dmp

          memory/5316-34-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/5316-33-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/5316-31-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/5316-25-0x00007FF9CEF10000-0x00007FF9CF8B4000-memory.dmp

          memory/5316-7-0x000001F3E6530000-0x000001F3E660C000-memory.dmp

          memory/5316-6-0x000001F3CDB80000-0x000001F3CDBCA000-memory.dmp

          memory/5316-5-0x000001F3CD250000-0x000001F3CD25A000-memory.dmp