Resubmissions

27-03-2023 10:22

230327-mepxrafa5v 10

04-01-2023 02:34

230104-c2x7jagh6t 10

04-01-2023 02:21

230104-cta22agh5v 10

Analysis

  • max time kernel
    42s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    04-01-2023 02:21

General

  • Target

    ChMetamask.exe

  • Size

    1.3MB

  • MD5

    e7529d32d963da6df89e3ffc6b14cd08

  • SHA1

    4a11070ee8c0030ffdcf299e2b49d180e1890f57

  • SHA256

    75883a7761887acd7afab7f2acc4f48fe72ff32577397a3c6786ded83db1e57b

  • SHA512

    35c220822e24eb8d5b5fef18fd2b7f57b73ab61102632007af89bbe4b9eaca814e817adf6fb0a830c08928cb50e649cdb2da1c5550797ff4b1b377e9ffa99156

  • SSDEEP

    24576:HWiMngrdePNzQ0ZIxNXaV9x4IUgs36BUI2So5+jnzFoCaGApu8L:qgReFs0ZM0T+Sk6BU7HIFo7G98L

Malware Config

Signatures

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty payload 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ChMetamask.exe
    "C:\Users\Admin\AppData\Local\Temp\ChMetamask.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:832
    • C:\Windows\system32\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1528
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:1636
        • C:\Windows\system32\netsh.exe
          netsh wlan show profile
          3⤵
            PID:884
          • C:\Windows\system32\findstr.exe
            findstr All
            3⤵
              PID:1760
          • C:\Windows\system32\cmd.exe
            "cmd.exe" /C chcp 65001 && netsh wlan show profile name=65001 key=clear | findstr Key
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1856
            • C:\Windows\system32\chcp.com
              chcp 65001
              3⤵
                PID:920
              • C:\Windows\system32\netsh.exe
                netsh wlan show profile name=65001 key=clear
                3⤵
                  PID:1772
                • C:\Windows\system32\findstr.exe
                  findstr Key
                  3⤵
                    PID:1456

              Network

              MITRE ATT&CK Matrix ATT&CK v6

              Persistence

              Registry Run Keys / Startup Folder

              1
              T1060

              Defense Evasion

              Modify Registry

              2
              T1112

              Install Root Certificate

              1
              T1130

              Credential Access

              Credentials in Files

              1
              T1081

              Collection

              Data from Local System

              1
              T1005

              Command and Control

              Web Service

              1
              T1102

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • memory/832-54-0x0000000000E10000-0x0000000000F68000-memory.dmp
                Filesize

                1.3MB

              • memory/832-55-0x0000000000370000-0x000000000037A000-memory.dmp
                Filesize

                40KB

              • memory/832-56-0x00000000009C0000-0x00000000009DA000-memory.dmp
                Filesize

                104KB

              • memory/884-59-0x0000000000000000-mapping.dmp
              • memory/884-61-0x000007FEFC611000-0x000007FEFC613000-memory.dmp
                Filesize

                8KB

              • memory/920-63-0x0000000000000000-mapping.dmp
              • memory/1456-65-0x0000000000000000-mapping.dmp
              • memory/1528-57-0x0000000000000000-mapping.dmp
              • memory/1636-58-0x0000000000000000-mapping.dmp
              • memory/1760-60-0x0000000000000000-mapping.dmp
              • memory/1772-64-0x0000000000000000-mapping.dmp
              • memory/1856-62-0x0000000000000000-mapping.dmp