Analysis

  • max time kernel
    150s
  • max time network
    150s
  • 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, 12:04

General

  • Target

    Trojan.Win32.Small.exe

  • Size

    97KB

  • MD5

    1d5f8c24450948f2bfcc89c80b3d5f97

  • SHA1

    8b7563cb9fc9e4d269a0fb77ab5a5045e4ad2317

  • SHA256

    de00fe780f212cae5d248e9cfbcbb2864aa3a66e1c018dea2aa81bac770dab50

  • SHA512

    681e70c8dab349f8bb9001b02805e54d39a0c1219774eabc4fdc782b06ad2c8991732a85453e9ff69ad1cf758a32111d6178bbc71664a255cb032bc9ea70b5b4

  • SSDEEP

    1536:qiRRk7iOAYZBazwRhNKLYk4G7um6nrO0+BeTiiPMZlkCRjImd0:qQk7/FZh8UkRz6nrOLgOuEkC1Dd0

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 28 IoCs
  • UPX dump on OEP (original entry point) 29 IoCs
  • UPX packed file 28 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 13 IoCs

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

  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\dwm.exe
    "dwm.exe"
    1⤵
      PID:336
    • C:\Windows\system32\fontdrvhost.exe
      "fontdrvhost.exe"
      1⤵
        PID:796
      • C:\Windows\system32\fontdrvhost.exe
        "fontdrvhost.exe"
        1⤵
          PID:788
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:3884
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:3444
            • C:\Windows\system32\backgroundTaskHost.exe
              "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
              1⤵
                PID:836
              • C:\Windows\system32\backgroundTaskHost.exe
                "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
                1⤵
                  PID:2544
                • C:\Windows\system32\backgroundTaskHost.exe
                  "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppX53ypgrj20bgndg05hj3tc7z654myszwp.mca
                  1⤵
                    PID:816
                  • 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:4496
                    • C:\Windows\System32\RuntimeBroker.exe
                      C:\Windows\System32\RuntimeBroker.exe -Embedding
                      1⤵
                        PID:3856
                      • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                        "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                        1⤵
                          PID:3968
                        • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                          "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                          1⤵
                            PID:3820
                          • C:\Windows\system32\DllHost.exe
                            C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                            1⤵
                              PID:3728
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                              1⤵
                                PID:3544
                              • C:\Windows\Explorer.EXE
                                C:\Windows\Explorer.EXE
                                1⤵
                                  PID:3360
                                  • C:\Users\Admin\AppData\Local\Temp\Trojan.Win32.Small.exe
                                    "C:\Users\Admin\AppData\Local\Temp\Trojan.Win32.Small.exe"
                                    2⤵
                                    • Modifies firewall policy service
                                    • UAC bypass
                                    • Windows security bypass
                                    • Windows security modification
                                    • Checks whether UAC is enabled
                                    • Enumerates connected drives
                                    • Drops file in Program Files directory
                                    • Drops file in Windows directory
                                    • Suspicious behavior: EnumeratesProcesses
                                    • Suspicious use of AdjustPrivilegeToken
                                    • Suspicious use of WriteProcessMemory
                                    • System policy modification
                                    PID:3904
                                • C:\Windows\system32\taskhostw.exe
                                  taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                                  1⤵
                                    PID:3044
                                  • C:\Windows\system32\svchost.exe
                                    C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
                                    1⤵
                                      PID:2964
                                    • C:\Windows\system32\sihost.exe
                                      sihost.exe
                                      1⤵
                                        PID:2936
                                      • C:\Windows\System32\RuntimeBroker.exe
                                        C:\Windows\System32\RuntimeBroker.exe -Embedding
                                        1⤵
                                          PID:4760
                                        • C:\Windows\System32\RuntimeBroker.exe
                                          C:\Windows\System32\RuntimeBroker.exe -Embedding
                                          1⤵
                                            PID:3244
                                          • C:\Windows\System32\wuapihost.exe
                                            C:\Windows\System32\wuapihost.exe -Embedding
                                            1⤵
                                              PID:628

                                            Network

                                                  MITRE ATT&CK Enterprise v15

                                                  Replay Monitor

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                                                  Downloads

                                                  • memory/3904-0-0x0000000000400000-0x0000000000412000-memory.dmp

                                                    Filesize

                                                    72KB

                                                  • memory/3904-1-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-3-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-4-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-5-0x0000000003620000-0x0000000003622000-memory.dmp

                                                    Filesize

                                                    8KB

                                                  • memory/3904-6-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-9-0x0000000003620000-0x0000000003622000-memory.dmp

                                                    Filesize

                                                    8KB

                                                  • memory/3904-7-0x0000000003CF0000-0x0000000003CF1000-memory.dmp

                                                    Filesize

                                                    4KB

                                                  • memory/3904-10-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-16-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-17-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-18-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-20-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-21-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-22-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-23-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-24-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-25-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-27-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-28-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-29-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-31-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-34-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-36-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-38-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-41-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-43-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-45-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-47-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-49-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-51-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-53-0x0000000000740000-0x00000000017FA000-memory.dmp

                                                    Filesize

                                                    16.7MB

                                                  • memory/3904-64-0x0000000003620000-0x0000000003622000-memory.dmp

                                                    Filesize

                                                    8KB

                                                  • memory/3904-71-0x0000000000400000-0x0000000000412000-memory.dmp

                                                    Filesize

                                                    72KB