Analysis

  • max time kernel
    150s
  • max time network
    89s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    14-07-2022 06:40

General

  • Target

    4771a9b9240d732a11a4f25240ceef633a49ecb81ed6503b427688d16f740664.exe

  • Size

    221KB

  • MD5

    90af628b9c7875599eb32e093310c8b1

  • SHA1

    56163f9470a0880b516a9347335bb61864301274

  • SHA256

    4771a9b9240d732a11a4f25240ceef633a49ecb81ed6503b427688d16f740664

  • SHA512

    30292178bb237ceee8faf3b06250e28b95ee24d91bcf0f5d0509f38a04a87ac7bd609437fb41ca62ed1dadef1a08b0a029b8b3b85d7009239b622db7ffcb47b9

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/

http://klkjwre77638dfqwieuoi888.info/

Signatures

  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 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
  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • UPX packed file 3 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 Program Files directory 5 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 27 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 19 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    1⤵
      PID:1132
    • C:\Windows\system32\Dwm.exe
      "C:\Windows\system32\Dwm.exe"
      1⤵
        PID:1252
      • C:\Windows\Explorer.EXE
        C:\Windows\Explorer.EXE
        1⤵
          PID:1312
          • C:\Users\Admin\AppData\Local\Temp\4771a9b9240d732a11a4f25240ceef633a49ecb81ed6503b427688d16f740664.exe
            "C:\Users\Admin\AppData\Local\Temp\4771a9b9240d732a11a4f25240ceef633a49ecb81ed6503b427688d16f740664.exe"
            2⤵
            • Modifies firewall policy service
            • Modifies visibility of file extensions in Explorer
            • Modifies visiblity of hidden/system files in Explorer
            • UAC bypass
            • Windows security bypass
            • Disables RegEdit via registry modification
            • Windows security modification
            • Checks whether UAC is enabled
            • 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:848

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Persistence

        Modify Existing Service

        1
        T1031

        Hidden Files and Directories

        2
        T1158

        Privilege Escalation

        Bypass User Account Control

        1
        T1088

        Defense Evasion

        Modify Registry

        7
        T1112

        Hidden Files and Directories

        2
        T1158

        Bypass User Account Control

        1
        T1088

        Disabling Security Tools

        3
        T1089

        Discovery

        System Information Discovery

        2
        T1082

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/848-54-0x0000000075951000-0x0000000075953000-memory.dmp
          Filesize

          8KB

        • memory/848-55-0x0000000001D40000-0x0000000002DCE000-memory.dmp
          Filesize

          16.6MB

        • memory/848-56-0x0000000000400000-0x000000000042B000-memory.dmp
          Filesize

          172KB

        • memory/848-57-0x0000000001D40000-0x0000000002DCE000-memory.dmp
          Filesize

          16.6MB

        • memory/848-58-0x0000000000270000-0x0000000000272000-memory.dmp
          Filesize

          8KB

        • memory/848-59-0x0000000074131000-0x0000000074133000-memory.dmp
          Filesize

          8KB

        • memory/848-60-0x0000000003BB0000-0x0000000003BB2000-memory.dmp
          Filesize

          8KB

        • memory/848-62-0x0000000000270000-0x0000000000272000-memory.dmp
          Filesize

          8KB

        • memory/848-61-0x0000000001D40000-0x0000000002DCE000-memory.dmp
          Filesize

          16.6MB

        • memory/848-63-0x0000000003BB0000-0x0000000003BB2000-memory.dmp
          Filesize

          8KB