Analysis

  • max time kernel
    147s
  • max time network
    163s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/02/2024, 16:01

General

  • Target
    1c739a5deff56d0918ca4e0dd06ba93b.dll
  • Size 120KB
  • Sample240229-tf7braec49
  • SHA256 3113780511d6269f5431a8346ae5b010fb48da9e445b16306353dd7991fc49ad
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • sality

C2
  • http://89.119.67.154/testo5/

  • http://kukutrustnet777.info/home.gif

  • http://kukutrustnet888.info/home.gif

  • http://kukutrustnet987.info/home.gif

Signatures

  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Sality

    Sality is backdoor written in C++, first discovered in 2003.

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 6 IoCs
  • Detects executables packed with Sality Polymorphic Code Generator or Simple Poly Engine or Sality 21 IoCs
  • UPX dump on OEP (original entry point) 26 IoCs
  • Executes dropped EXE 3 IoCs
  • UPX packed file 21 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Windows security modification 2 TTPs 7 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 5 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Windows directory 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 57 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\System32\RuntimeBroker.exe
    C:\Windows\System32\RuntimeBroker.exe -Embedding
    1⤵
      PID:4056
    • C:\Windows\system32\backgroundTaskHost.exe
      "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
      1⤵
        PID:2740
      • C:\Windows\system32\backgroundTaskHost.exe
        "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
        1⤵
          PID:2488
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:4848
          • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost.exe
            "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost.exe" -ServerName:InputApp.AppX9jnwykgrccxc8by3hsrsh07r423xzvav.mca
            1⤵
              PID:3300
            • C:\Windows\system32\rundll32.exe
              rundll32.exe C:\Users\Admin\AppData\Local\Temp\1c739a5deff56d0918ca4e0dd06ba93b.dll,#1
              1⤵
              • Suspicious use of WriteProcessMemory
              PID:1400
              • C:\Windows\SysWOW64\rundll32.exe
                rundll32.exe C:\Users\Admin\AppData\Local\Temp\1c739a5deff56d0918ca4e0dd06ba93b.dll,#1
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:2952
                • C:\Users\Admin\AppData\Local\Temp\e5789c1.exe
                  C:\Users\Admin\AppData\Local\Temp\e5789c1.exe
                  3⤵
                  • Modifies firewall policy service
                  • UAC bypass
                  • Windows security bypass
                  • Executes dropped EXE
                  • Windows security modification
                  • Checks whether UAC is enabled
                  • Enumerates connected drives
                  • Drops file in Windows directory
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  • System policy modification
                  PID:3812
                • C:\Users\Admin\AppData\Local\Temp\e578e55.exe
                  C:\Users\Admin\AppData\Local\Temp\e578e55.exe
                  3⤵
                  • Executes dropped EXE
                  PID:4644
                • C:\Users\Admin\AppData\Local\Temp\e57901a.exe
                  C:\Users\Admin\AppData\Local\Temp\e57901a.exe
                  3⤵
                  • Executes dropped EXE
                  PID:3116
            • C:\Windows\System32\RuntimeBroker.exe
              C:\Windows\System32\RuntimeBroker.exe -Embedding
              1⤵
                PID:4164
              • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                1⤵
                  PID:1448
                • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                  "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                  1⤵
                    PID:3956
                  • C:\Windows\system32\DllHost.exe
                    C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                    1⤵
                      PID:3864
                    • C:\Windows\system32\svchost.exe
                      C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                      1⤵
                        PID:3664
                      • C:\Windows\Explorer.EXE
                        C:\Windows\Explorer.EXE
                        1⤵
                          PID:3496
                        • C:\Windows\system32\taskhostw.exe
                          taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                          1⤵
                            PID:2812
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
                            1⤵
                              PID:2652
                            • C:\Windows\system32\sihost.exe
                              sihost.exe
                              1⤵
                                PID:2644
                              • C:\Windows\system32\dwm.exe
                                "dwm.exe"
                                1⤵
                                  PID:320
                                • C:\Windows\system32\fontdrvhost.exe
                                  "fontdrvhost.exe"
                                  1⤵
                                    PID:824
                                  • C:\Windows\system32\fontdrvhost.exe
                                    "fontdrvhost.exe"
                                    1⤵
                                      PID:816
                                    • C:\Windows\System32\RuntimeBroker.exe
                                      C:\Windows\System32\RuntimeBroker.exe -Embedding
                                      1⤵
                                        PID:3280
                                      • C:\Windows\System32\RuntimeBroker.exe
                                        C:\Windows\System32\RuntimeBroker.exe -Embedding
                                        1⤵
                                          PID:4808

                                        Network

                                              MITRE ATT&CK Enterprise v15

                                              Replay Monitor

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                                              Downloads

                                              e5789c1.exe

                                              • Path C:\Users\Admin\AppData\Local\Temp\e5789c1.exe
                                              • Size 97KB
                                              • SHA256 484db0b154a5256433630e3553c66fefdb2df6758a4bbc3b61aa9d16cd2fa330
                                              • MD5 SHA1 SHA512 SSDEEP

                                              memory/2952-34-0x0000000000BB0000-0x0000000000BB2000-memory.dmp

                                              memory/2952-0-0x0000000010000000-0x0000000010020000-memory.dmp

                                              memory/2952-11-0x0000000000BB0000-0x0000000000BB2000-memory.dmp

                                              memory/2952-12-0x0000000003E40000-0x0000000003E41000-memory.dmp

                                              memory/2952-14-0x0000000000BB0000-0x0000000000BB2000-memory.dmp

                                              memory/3116-93-0x0000000000400000-0x0000000000412000-memory.dmp

                                              memory/3116-90-0x00000000001E0000-0x00000000001E2000-memory.dmp

                                              memory/3116-56-0x00000000001E0000-0x00000000001E2000-memory.dmp

                                              memory/3116-54-0x00000000001F0000-0x00000000001F1000-memory.dmp

                                              memory/3116-39-0x0000000000400000-0x0000000000412000-memory.dmp

                                              memory/3812-59-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-19-0x0000000003BF0000-0x0000000003BF1000-memory.dmp

                                              memory/3812-21-0x0000000001B30000-0x0000000001B32000-memory.dmp

                                              memory/3812-17-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-31-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-94-0x0000000000400000-0x0000000000412000-memory.dmp

                                              memory/3812-40-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-42-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-43-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-44-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-45-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-46-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-47-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-4-0x0000000000400000-0x0000000000412000-memory.dmp

                                              memory/3812-10-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-25-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-48-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-81-0x0000000001B30000-0x0000000001B32000-memory.dmp

                                              memory/3812-58-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-9-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-60-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-62-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-63-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-66-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-69-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/3812-7-0x00000000007A0000-0x000000000185A000-memory.dmp

                                              memory/4644-89-0x0000000000400000-0x0000000000412000-memory.dmp

                                              memory/4644-86-0x00000000001E0000-0x00000000001E2000-memory.dmp

                                              memory/4644-52-0x00000000001E0000-0x00000000001E2000-memory.dmp

                                              memory/4644-50-0x00000000001F0000-0x00000000001F1000-memory.dmp

                                              memory/4644-24-0x0000000000400000-0x0000000000412000-memory.dmp