Analysis

  • max time kernel
    147s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-05-2024 01:46

General

  • Target

    ELTIMASerialSplitter/ssplitinst.exe

  • Size

    6.4MB

  • MD5

    21f124a12e8ea4e537ac519792be7eb0

  • SHA1

    6522ddb1872be1e63eb1b97a65a4d556720c0922

  • SHA256

    7c8aae4560527acaecdc848949f639c9ce086e335659839e84d48abb9bb6dac6

  • SHA512

    857e3a0a12b2dab0900a2a48b5ab53b76c4c8237f682f6837cd71a9991e0a4261812bc76f69d21b655cc0a311eacdd2a2466aec57f21ec4a5a92c52feda0636f

  • SSDEEP

    98304:AqYz9oGhVYAGKmL2LxJl8soC0OAax9M6oZFVIL5qIL/lL2Z4+AVW1DXEDQfB:AqYzthVcgfasoC0ix/oZFs/NQ4pMlXzB

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

  • 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
  • Executes dropped EXE 1 IoCs
  • UPX packed file 14 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
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\fontdrvhost.exe
    "fontdrvhost.exe"
    1⤵
      PID:772
    • C:\Windows\system32\fontdrvhost.exe
      "fontdrvhost.exe"
      1⤵
        PID:780
      • C:\Windows\system32\dwm.exe
        "dwm.exe"
        1⤵
          PID:60
        • C:\Windows\system32\sihost.exe
          sihost.exe
          1⤵
            PID:2520
          • C:\Windows\system32\svchost.exe
            C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
            1⤵
              PID:2560
            • C:\Windows\system32\taskhostw.exe
              taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
              1⤵
                PID:2668
              • C:\Windows\Explorer.EXE
                C:\Windows\Explorer.EXE
                1⤵
                  PID:3488
                  • C:\Users\Admin\AppData\Local\Temp\ELTIMASerialSplitter\ssplitinst.exe
                    "C:\Users\Admin\AppData\Local\Temp\ELTIMASerialSplitter\ssplitinst.exe"
                    2⤵
                    • Modifies firewall policy service
                    • UAC bypass
                    • Windows security bypass
                    • Windows security modification
                    • Checks whether UAC is enabled
                    • Drops file in Windows directory
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    • System policy modification
                    PID:4592
                    • C:\Users\Admin\AppData\Local\Temp\is-APH09.tmp\ssplitinst.tmp
                      "C:\Users\Admin\AppData\Local\Temp\is-APH09.tmp\ssplitinst.tmp" /SL5="$601D4,6159599,141824,C:\Users\Admin\AppData\Local\Temp\ELTIMASerialSplitter\ssplitinst.exe"
                      3⤵
                      • Executes dropped EXE
                      PID:2892
                • C:\Windows\system32\svchost.exe
                  C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                  1⤵
                    PID:3692
                  • C:\Windows\system32\DllHost.exe
                    C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                    1⤵
                      PID:3892
                    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                      1⤵
                        PID:3984
                      • C:\Windows\System32\RuntimeBroker.exe
                        C:\Windows\System32\RuntimeBroker.exe -Embedding
                        1⤵
                          PID:4052
                        • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                          "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                          1⤵
                            PID:764
                          • C:\Windows\System32\RuntimeBroker.exe
                            C:\Windows\System32\RuntimeBroker.exe -Embedding
                            1⤵
                              PID:3048
                            • C:\Windows\System32\RuntimeBroker.exe
                              C:\Windows\System32\RuntimeBroker.exe -Embedding
                              1⤵
                                PID:4092
                              • 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:4520
                                • C:\Windows\system32\backgroundTaskHost.exe
                                  "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
                                  1⤵
                                    PID:4664
                                  • C:\Windows\system32\backgroundTaskHost.exe
                                    "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
                                    1⤵
                                      PID:5108

                                    Network

                                    MITRE ATT&CK Matrix ATT&CK v13

                                    Persistence

                                    Create or Modify System Process

                                    1
                                    T1543

                                    Windows Service

                                    1
                                    T1543.003

                                    Privilege Escalation

                                    Create or Modify System Process

                                    1
                                    T1543

                                    Windows Service

                                    1
                                    T1543.003

                                    Abuse Elevation Control Mechanism

                                    1
                                    T1548

                                    Bypass User Account Control

                                    1
                                    T1548.002

                                    Defense Evasion

                                    Modify Registry

                                    5
                                    T1112

                                    Abuse Elevation Control Mechanism

                                    1
                                    T1548

                                    Bypass User Account Control

                                    1
                                    T1548.002

                                    Impair Defenses

                                    3
                                    T1562

                                    Disable or Modify Tools

                                    3
                                    T1562.001

                                    Discovery

                                    System Information Discovery

                                    2
                                    T1082

                                    Replay Monitor

                                    Loading Replay Monitor...

                                    Downloads

                                    • C:\Users\Admin\AppData\Local\Temp\is-APH09.tmp\ssplitinst.tmp
                                      Filesize

                                      1.1MB

                                      MD5

                                      206a0d523af8ed8537a37eb2ae9d998e

                                      SHA1

                                      321fcc8cfe84ba5fabbe4f4ea078f2714c3e8644

                                      SHA256

                                      fe3269a1a58f5675821af03cd8fa868b5d80ba28c1b5dfcc9d7365d5ffd7c49c

                                      SHA512

                                      5841949fb1d44c9f21e5297adf30671240fbde6fa2bbc7addf32d2adf97a3fa64df259d82d5b793ba65f45caacede94bf24e769fbc81124fc29c438e5000a3a7

                                    • memory/2892-33-0x0000000000400000-0x0000000000537000-memory.dmp
                                      Filesize

                                      1.2MB

                                    • memory/2892-25-0x0000000000400000-0x0000000000537000-memory.dmp
                                      Filesize

                                      1.2MB

                                    • memory/4592-12-0x00000000004F0000-0x00000000004F2000-memory.dmp
                                      Filesize

                                      8KB

                                    • memory/4592-17-0x00000000004F0000-0x00000000004F2000-memory.dmp
                                      Filesize

                                      8KB

                                    • memory/4592-13-0x0000000000680000-0x0000000000681000-memory.dmp
                                      Filesize

                                      4KB

                                    • memory/4592-0-0x0000000000400000-0x0000000000440000-memory.dmp
                                      Filesize

                                      256KB

                                    • memory/4592-16-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-19-0x0000000000401000-0x0000000000416000-memory.dmp
                                      Filesize

                                      84KB

                                    • memory/4592-1-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-15-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-21-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-7-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-18-0x00000000004F0000-0x00000000004F2000-memory.dmp
                                      Filesize

                                      8KB

                                    • memory/4592-8-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-14-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-24-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-11-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-27-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-28-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-29-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-30-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-31-0x0000000002380000-0x000000000340E000-memory.dmp
                                      Filesize

                                      16.6MB

                                    • memory/4592-4-0x0000000000400000-0x0000000000440000-memory.dmp
                                      Filesize

                                      256KB

                                    • memory/4592-40-0x00000000004F0000-0x00000000004F2000-memory.dmp
                                      Filesize

                                      8KB

                                    • memory/4592-49-0x0000000000400000-0x0000000000440000-memory.dmp
                                      Filesize

                                      256KB