Analysis

  • max time kernel
    69s
  • max time network
    44s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 18:57

General

  • Target

    SSCN_12462020pdf.exe

  • Size

    444KB

  • MD5

    33d17dffd1221cd066f45811323b44b1

  • SHA1

    4412bb573391d3466ba49d0d0451d0bb73b245c8

  • SHA256

    ba2937327a241e543cddc12d8c1648db557d5408cc4fe8d06a5261d2d96896ca

  • SHA512

    b7f6c51325171a8d3d6b89c07ebf6715f74ba4fa19bd62f781719c540494a18c0c659301957b34c6bce4ea5f7cf837fe6f299d7a56d8f97e2cc54bd62b3ae8dd

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    secure231.servconfig.com
  • Port:
    587
  • Username:
    info@eltaef.com
  • Password:
    eltaefSH6548883

Signatures

  • AgentTesla

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

  • AgentTesla Payload 6 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
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SSCN_12462020pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\SSCN_12462020pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:948
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XkNVCBG" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDB8.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2004
    • C:\Users\Admin\AppData\Local\Temp\SSCN_12462020pdf.exe
      "{path}"
      2⤵
        PID:1112
      • C:\Users\Admin\AppData\Local\Temp\SSCN_12462020pdf.exe
        "{path}"
        2⤵
          PID:1244
        • C:\Users\Admin\AppData\Local\Temp\SSCN_12462020pdf.exe
          "{path}"
          2⤵
          • Accesses Microsoft Outlook profiles
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • outlook_office_path
          • outlook_win_path
          PID:1252
          • C:\Windows\SysWOW64\netsh.exe
            "netsh" wlan show profile
            3⤵
              PID:840

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Execution

        Scheduled Task

        1
        T1053

        Persistence

        Scheduled Task

        1
        T1053

        Privilege Escalation

        Scheduled Task

        1
        T1053

        Credential Access

        Credentials in Files

        3
        T1081

        Discovery

        System Information Discovery

        1
        T1082

        Collection

        Data from Local System

        3
        T1005

        Email Collection

        1
        T1114

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmpDB8.tmp
          Filesize

          1KB

          MD5

          860add37e21ae9ad8c82247c6e65bef1

          SHA1

          ebf05faed730fa6b86be356f3c2b47615ed75173

          SHA256

          9e2bd6d74bab3d16381586923f18d1d46f317f35f131559a696f6f8925f5ef85

          SHA512

          f7564718e791559eb3b4539f8000076839c911e73991fcbed8c2f0ded404f56ebb3ba6267e1d4dfba2c8a79e732919c931728d588dc6f11d2c03c61727dc2d5a

        • memory/840-71-0x0000000000000000-mapping.dmp
        • memory/948-54-0x0000000075DF1000-0x0000000075DF3000-memory.dmp
          Filesize

          8KB

        • memory/948-55-0x0000000074970000-0x0000000074F1B000-memory.dmp
          Filesize

          5.7MB

        • memory/1252-61-0x0000000000400000-0x0000000000452000-memory.dmp
          Filesize

          328KB

        • memory/1252-59-0x0000000000400000-0x0000000000452000-memory.dmp
          Filesize

          328KB

        • memory/1252-58-0x0000000000400000-0x0000000000452000-memory.dmp
          Filesize

          328KB

        • memory/1252-63-0x0000000000400000-0x0000000000452000-memory.dmp
          Filesize

          328KB

        • memory/1252-62-0x0000000000400000-0x0000000000452000-memory.dmp
          Filesize

          328KB

        • memory/1252-64-0x000000000044CB2E-mapping.dmp
        • memory/1252-66-0x0000000000400000-0x0000000000452000-memory.dmp
          Filesize

          328KB

        • memory/1252-68-0x0000000000400000-0x0000000000452000-memory.dmp
          Filesize

          328KB

        • memory/1252-70-0x0000000074970000-0x0000000074F1B000-memory.dmp
          Filesize

          5.7MB

        • memory/2004-56-0x0000000000000000-mapping.dmp