Analysis

  • max time kernel
    122s
  • 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

    65KB

  • MD5

    f43a7a07216c219244fa4857b38f348b

  • SHA1

    1d263f2bfce236226d45a91341855f0477c7a79f

  • SHA256

    ced57cc956cff4501b2118093057c638e6638b388ba23f8c0f32732dcbcdfbde

  • SHA512

    d2d8f58db911b1a128cfc09665e2898d70aab5870f778f3724836cff2ce09037e7b2fcf19810e16ffc49e71bdbcf09580d1dbd72c21e477d634a8d9671a7bf24

  • SSDEEP

    1536:MU9cfutdSC5kAFDD/XyD8nlkelYOWwc1lUhhBpmER+uCedF:MUHd9Fv/XuSk/1STBpmEBCS

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 38 IoCs
  • UPX dump on OEP (original entry point) 38 IoCs
  • UPX packed file 38 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 21 IoCs

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

  • Drops autorun.inf file 1 TTPs 2 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in Program Files directory 11 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 24 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\dwm.exe
    "dwm.exe"
    1⤵
      PID:68
    • C:\Windows\System32\RuntimeBroker.exe
      C:\Windows\System32\RuntimeBroker.exe -Embedding
      1⤵
        PID:3920
      • C:\Windows\system32\backgroundTaskHost.exe
        "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
        1⤵
          PID:5104
        • C:\Windows\system32\backgroundTaskHost.exe
          "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
          1⤵
            PID:1376
          • C:\Windows\system32\backgroundTaskHost.exe
            "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppX53ypgrj20bgndg05hj3tc7z654myszwp.mca
            1⤵
              PID:4852
            • C:\Windows\System32\RuntimeBroker.exe
              C:\Windows\System32\RuntimeBroker.exe -Embedding
              1⤵
                PID:2428
              • 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:744
                • C:\Windows\System32\RuntimeBroker.exe
                  C:\Windows\System32\RuntimeBroker.exe -Embedding
                  1⤵
                    PID:2356
                  • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                    "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                    1⤵
                      PID:4016
                    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                      1⤵
                        PID:3856
                      • C:\Windows\system32\DllHost.exe
                        C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                        1⤵
                          PID:3764
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                          1⤵
                            PID:3580
                          • C:\Windows\Explorer.EXE
                            C:\Windows\Explorer.EXE
                            1⤵
                              PID:3444
                              • 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 autorun.inf file
                                • Drops file in Program Files directory
                                • Drops file in Windows directory
                                • Modifies registry class
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                • Suspicious use of WriteProcessMemory
                                • System policy modification
                                PID:4812
                            • C:\Windows\system32\taskhostw.exe
                              taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                              1⤵
                                PID:748
                              • C:\Windows\system32\svchost.exe
                                C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
                                1⤵
                                  PID:3056
                                • C:\Windows\system32\sihost.exe
                                  sihost.exe
                                  1⤵
                                    PID:2992
                                  • C:\Windows\system32\fontdrvhost.exe
                                    "fontdrvhost.exe"
                                    1⤵
                                      PID:768
                                    • C:\Windows\system32\fontdrvhost.exe
                                      "fontdrvhost.exe"
                                      1⤵
                                        PID:764
                                      • C:\Windows\System32\RuntimeBroker.exe
                                        C:\Windows\System32\RuntimeBroker.exe -Embedding
                                        1⤵
                                          PID:3100
                                        • C:\Windows\System32\RuntimeBroker.exe
                                          C:\Windows\System32\RuntimeBroker.exe -Embedding
                                          1⤵
                                            PID:1036
                                          • C:\Windows\System32\wuapihost.exe
                                            C:\Windows\System32\wuapihost.exe -Embedding
                                            1⤵
                                              PID:5040
                                            • C:\Windows\System32\RuntimeBroker.exe
                                              C:\Windows\System32\RuntimeBroker.exe -Embedding
                                              1⤵
                                                PID:2336

                                              Network

                                                    MITRE ATT&CK Enterprise v15

                                                    Replay Monitor

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                                                    Downloads

                                                    • F:\ijprcc.pif

                                                      Filesize

                                                      97KB

                                                      MD5

                                                      936d5a2e075f258c40d5843e43e8f939

                                                      SHA1

                                                      7750de4a2b398be01dc1585d3e3b31ddff991e3b

                                                      SHA256

                                                      12e4c7491b1aa9848c0d87d26ea344e1adcbe95e2ab149a1a7b4faa12eb29ab5

                                                      SHA512

                                                      dc09ec583c2860a124b81aa7419cd2f975a086d6afb9d21ddb76871e2b62530f383757ea1596cc2fada421c2c40cb915efc0d493eef414f4dfa5215bcef253f6

                                                    • memory/4812-32-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-35-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-6-0x0000000004270000-0x0000000004272000-memory.dmp

                                                      Filesize

                                                      8KB

                                                    • memory/4812-7-0x00000000044C0000-0x00000000044C1000-memory.dmp

                                                      Filesize

                                                      4KB

                                                    • memory/4812-5-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-8-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-10-0x0000000004270000-0x0000000004272000-memory.dmp

                                                      Filesize

                                                      8KB

                                                    • memory/4812-11-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-17-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-18-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-19-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-20-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-21-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-22-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-23-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-24-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-25-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-0-0x0000000000400000-0x0000000000412000-memory.dmp

                                                      Filesize

                                                      72KB

                                                    • memory/4812-28-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-29-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-4-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-30-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-26-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-37-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-39-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-42-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-44-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-46-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-48-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-50-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-52-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-54-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-56-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-58-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-60-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-67-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-68-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-69-0x0000000004270000-0x0000000004272000-memory.dmp

                                                      Filesize

                                                      8KB

                                                    • memory/4812-70-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-72-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-74-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-76-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB

                                                    • memory/4812-2-0x0000000000810000-0x00000000018CA000-memory.dmp

                                                      Filesize

                                                      16.7MB