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Analysis

  • max time kernel
    117s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    06/01/2025, 20:34

General

  • Target

    $PLUGINSDIR/aiuxmmjtmkz.dll

  • Size

    19KB

  • MD5

    586dd640c4a64cdf876ac0bfe48ad870

  • SHA1

    8f9704a440ee2fb56b0bfd2a2f9a5b2a3fa685f0

  • SHA256

    206c1772141cc0ae68d1a3a317c1b4e5b2ece540322c211b6a37d65f100114cd

  • SHA512

    984100b0309b9d2f3cdf783697a497cea4675aee9b2c4529ef20afd6bdf011f1240044bfda2af2f9bb98b98c45b03c6d72e98dda2da8a958d36f3229c9a0dc62

  • SSDEEP

    192:6z+aLflYnmPwn5488nq3lfstCTJ28WzKKMih6rmvIQb/Wj0J43UESslEUwvyX2Rm:6zJBYew5JDstCToJTIi/W2slE5vYQHG

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot1803146213:AAHYyCRx7FggQ9LfPbrIs79ZUWCEc9wNnDo/sendDocument

Signatures

  • AgentTesla

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

  • Agenttesla family
  • AgentTesla payload 4 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • 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 3 TTPs

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

  • Unsecured Credentials: Credentials In Files 1 TTPs

    Steal credentials from unsecured files.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\aiuxmmjtmkz.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2380
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\aiuxmmjtmkz.dll,#1
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2320
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\aiuxmmjtmkz.dll,#1
        3⤵
        • Accesses Microsoft Outlook profiles
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:756

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/756-8-0x0000000073FA0000-0x000000007468E000-memory.dmp

    Filesize

    6.9MB

  • memory/756-1-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/756-5-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/756-3-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/756-6-0x0000000073FAE000-0x0000000073FAF000-memory.dmp

    Filesize

    4KB

  • memory/756-7-0x00000000003C0000-0x00000000003FC000-memory.dmp

    Filesize

    240KB

  • memory/756-9-0x0000000073FA0000-0x000000007468E000-memory.dmp

    Filesize

    6.9MB

  • memory/756-10-0x0000000073FA0000-0x000000007468E000-memory.dmp

    Filesize

    6.9MB

  • memory/756-11-0x0000000073FAE000-0x0000000073FAF000-memory.dmp

    Filesize

    4KB

  • memory/756-12-0x0000000073FA0000-0x000000007468E000-memory.dmp

    Filesize

    6.9MB

  • memory/756-13-0x0000000073FA0000-0x000000007468E000-memory.dmp

    Filesize

    6.9MB

  • memory/756-14-0x0000000073FA0000-0x000000007468E000-memory.dmp

    Filesize

    6.9MB

  • memory/2320-0-0x0000000010005000-0x0000000010007000-memory.dmp

    Filesize

    8KB