Analysis

  • max time kernel
    124s
  • max time network
    314s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    19-10-2021 01:37

General

  • Target

    _CNXTHG2.EXE

  • Size

    597KB

  • MD5

    6e0929f7dd27fbd8a1e8dcc5ce64a8ab

  • SHA1

    4b7d56b114757b315531e793ec1a350cc9c260e8

  • SHA256

    0ddffa900afacce4077361358e7b2b84efcec6a89814d21cff463976070f2be7

  • SHA512

    bfa4d9bc057c2cdd2c74a01042eaaade3123a4602354f1ce4a904beed8f5a01142943df7bd443764a2b1250a6b1e5b39e2205bbe097abdb69a5522d49cff57ce

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.omindexgroup.com/
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    UfB@t!s%IxwV

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • AgentTesla Payload 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\_CNXTHG2.EXE
    "C:\Users\Admin\AppData\Local\Temp\_CNXTHG2.EXE"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2188
    • C:\Users\Admin\AppData\Local\Temp\_CNXTHG2.EXE
      "C:\Users\Admin\AppData\Local\Temp\_CNXTHG2.EXE"
      2⤵
        PID:744
      • C:\Users\Admin\AppData\Local\Temp\_CNXTHG2.EXE
        "C:\Users\Admin\AppData\Local\Temp\_CNXTHG2.EXE"
        2⤵
          PID:1032
        • C:\Users\Admin\AppData\Local\Temp\_CNXTHG2.EXE
          "C:\Users\Admin\AppData\Local\Temp\_CNXTHG2.EXE"
          2⤵
          • Accesses Microsoft Outlook profiles
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • outlook_office_path
          • outlook_win_path
          PID:1244

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\_CNXTHG2.EXE.log

        MD5

        0c2899d7c6746f42d5bbe088c777f94c

        SHA1

        622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1

        SHA256

        5b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458

        SHA512

        ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078

      • memory/1244-124-0x0000000000400000-0x000000000043C000-memory.dmp

        Filesize

        240KB

      • memory/1244-133-0x0000000005DF0000-0x0000000005DF1000-memory.dmp

        Filesize

        4KB

      • memory/1244-132-0x00000000052C0000-0x00000000052C1000-memory.dmp

        Filesize

        4KB

      • memory/1244-131-0x00000000051D0000-0x00000000051D1000-memory.dmp

        Filesize

        4KB

      • memory/1244-125-0x00000000004375FE-mapping.dmp

      • memory/2188-119-0x0000000004DD0000-0x00000000052CE000-memory.dmp

        Filesize

        5.0MB

      • memory/2188-123-0x000000000ADF0000-0x000000000AE48000-memory.dmp

        Filesize

        352KB

      • memory/2188-122-0x00000000051E0000-0x00000000051E8000-memory.dmp

        Filesize

        32KB

      • memory/2188-121-0x000000000AAA0000-0x000000000AAA1000-memory.dmp

        Filesize

        4KB

      • memory/2188-120-0x0000000004D90000-0x0000000004D91000-memory.dmp

        Filesize

        4KB

      • memory/2188-115-0x00000000003F0000-0x00000000003F1000-memory.dmp

        Filesize

        4KB

      • memory/2188-118-0x0000000004DD0000-0x0000000004DD1000-memory.dmp

        Filesize

        4KB

      • memory/2188-117-0x00000000052D0000-0x00000000052D1000-memory.dmp

        Filesize

        4KB