Analysis

  • max time kernel
    155s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/11/2022, 00:32

General

  • Target
    821ac143dd07ba21d1a7546d2b386d6ae9a5472798a1311870d1608b880407a5.exe
  • Size 563KB
  • Sample221130-avsblaff4w
  • SHA256 821ac143dd07ba21d1a7546d2b386d6ae9a5472798a1311870d1608b880407a5
  • 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

  • http://www.klkjwre9fqwieluoi.info/

  • http://kukutrustnet777888.info/

Signatures

  • Detect Neshta payload 1 IoCs
  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Sality

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

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 6 IoCs
  • Executes dropped EXE 1 IoCs
  • UPX packed file 6 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Windows security modification 2 TTPs 7 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 20 IoCs

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

  • Drops autorun.inf file 1 TTPs 1 IoCs

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

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 28 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\fontdrvhost.exe
    "fontdrvhost.exe"
    1⤵
      PID:792
    • C:\Windows\system32\dwm.exe
      "dwm.exe"
      1⤵
        PID:372
      • C:\Windows\system32\fontdrvhost.exe
        "fontdrvhost.exe"
        1⤵
          PID:800
        • C:\Windows\system32\taskhostw.exe
          taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
          1⤵
            PID:2400
          • C:\Windows\system32\svchost.exe
            C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
            1⤵
              PID:2320
            • C:\Windows\system32\sihost.exe
              sihost.exe
              1⤵
                PID:2292
              • C:\Windows\System32\RuntimeBroker.exe
                C:\Windows\System32\RuntimeBroker.exe -Embedding
                1⤵
                  PID:3380
                • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                  "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                  1⤵
                    PID:3316
                  • C:\Windows\system32\DllHost.exe
                    C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                    1⤵
                      PID:3216
                    • C:\Windows\system32\svchost.exe
                      C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                      1⤵
                        PID:1328
                      • C:\Windows\Explorer.EXE
                        C:\Windows\Explorer.EXE
                        1⤵
                          PID:3064
                          • C:\Users\Admin\AppData\Local\Temp\821ac143dd07ba21d1a7546d2b386d6ae9a5472798a1311870d1608b880407a5.exe
                            "C:\Users\Admin\AppData\Local\Temp\821ac143dd07ba21d1a7546d2b386d6ae9a5472798a1311870d1608b880407a5.exe"
                            2⤵
                            • Modifies system executable filetype association
                            • Checks computer location settings
                            • Drops file in Program Files directory
                            • Drops file in Windows directory
                            • Modifies registry class
                            • Suspicious use of WriteProcessMemory
                            PID:644
                            • C:\Users\Admin\AppData\Local\Temp\3582-490\821ac143dd07ba21d1a7546d2b386d6ae9a5472798a1311870d1608b880407a5.exe
                              "C:\Users\Admin\AppData\Local\Temp\3582-490\821ac143dd07ba21d1a7546d2b386d6ae9a5472798a1311870d1608b880407a5.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 autorun.inf file
                              • Drops file in Program Files directory
                              • Drops file in Windows directory
                              • Suspicious behavior: EnumeratesProcesses
                              • Suspicious use of AdjustPrivilegeToken
                              • Suspicious use of SetWindowsHookEx
                              • Suspicious use of WriteProcessMemory
                              • System policy modification
                              PID:1220
                        • C:\Windows\System32\RuntimeBroker.exe
                          C:\Windows\System32\RuntimeBroker.exe -Embedding
                          1⤵
                            PID:4692
                          • C:\Windows\System32\RuntimeBroker.exe
                            C:\Windows\System32\RuntimeBroker.exe -Embedding
                            1⤵
                              PID:3820
                            • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                              "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                              1⤵
                                PID:3520

                              Network

                                    MITRE ATT&CK Enterprise v6

                                    Replay Monitor

                                    Loading Replay Monitor...

                                    Downloads

                                    office2016setup.exe

                                    • Path C:\ODT\office2016setup.exe
                                    • Size 5.1MB
                                    • SHA256 2a1ed24be7e3859b46ec3ebc316789ead5f12055853f86a9656e04b4bb771842
                                    • MD5 SHA1 SHA512 SSDEEP

                                    821ac143dd07ba21d1a7546d2b386d6ae9a5472798a1311870d1608b880407a5.exe

                                    • Path C:\Users\Admin\AppData\Local\Temp\3582-490\821ac143dd07ba21d1a7546d2b386d6ae9a5472798a1311870d1608b880407a5.exe
                                    • Size 523KB
                                    • SHA256 43ac46a4569aa70fb22067c9675ef814f619c98d5869bf72fd68940f834aad00
                                    • MD5 SHA1 SHA512 SSDEEP

                                    821ac143dd07ba21d1a7546d2b386d6ae9a5472798a1311870d1608b880407a5.exe

                                    • Path C:\Users\Admin\AppData\Local\Temp\3582-490\821ac143dd07ba21d1a7546d2b386d6ae9a5472798a1311870d1608b880407a5.exe
                                    • Size 523KB
                                    • SHA256 43ac46a4569aa70fb22067c9675ef814f619c98d5869bf72fd68940f834aad00
                                    • MD5 SHA1 SHA512 SSDEEP

                                    memory/1220-135-0x0000000002410000-0x000000000349E000-memory.dmp

                                    memory/1220-136-0x0000000000400000-0x000000000051E000-memory.dmp

                                    memory/1220-137-0x0000000000400000-0x000000000051E000-memory.dmp

                                    memory/1220-138-0x0000000002410000-0x000000000349E000-memory.dmp