Analysis

  • max time kernel
    123s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/05/2023, 07:23

General

  • Target

    01958599.exe

  • Size

    716KB

  • MD5

    971fcae02ecab66b5d8e9bf0603a8c75

  • SHA1

    a1de4fe698673ff100bffed0fcba2db98e683567

  • SHA256

    f9d49ba395212bc46444ac00546a04c8da9b251ce103adf52d9c80be61f6348c

  • SHA512

    f94805781cb7df0ebf67af23d08a4ed7d47ffc4a0e54b8b55a8178241793c4bf4311f866b83c98866635b1ecb0a31101e7034d384e2d408595676bac925377cb

  • SSDEEP

    12288:LBbmzZBEP85o4Y1yh9uxPuce1Dua0va/g2s8gJ7rUUUQo0JOAxQfl0yCByIQpD:09BEP8tvDB9YzTMc8CB5Q

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot5473903116:AAH0COryXTO6kCeNjQRiy6Z66WJsa9yts6c/

Signatures

  • AgentTesla

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

  • 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
  • Looks up external IP address via web service 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\01958599.exe
    "C:\Users\Admin\AppData\Local\Temp\01958599.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2544
    • C:\Users\Admin\AppData\Local\Temp\01958599.exe
      "C:\Users\Admin\AppData\Local\Temp\01958599.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:864
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 864 -s 2204
        3⤵
        • Program crash
        PID:3892
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 864 -ip 864
    1⤵
      PID:4184

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\01958599.exe.log

            Filesize

            1KB

            MD5

            8ec831f3e3a3f77e4a7b9cd32b48384c

            SHA1

            d83f09fd87c5bd86e045873c231c14836e76a05c

            SHA256

            7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

            SHA512

            26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

          • memory/864-140-0x0000000000400000-0x000000000043C000-memory.dmp

            Filesize

            240KB

          • memory/864-143-0x0000000005290000-0x00000000052A0000-memory.dmp

            Filesize

            64KB

          • memory/864-144-0x00000000058A0000-0x0000000005906000-memory.dmp

            Filesize

            408KB

          • memory/864-145-0x0000000006C00000-0x0000000006C50000-memory.dmp

            Filesize

            320KB

          • memory/2544-133-0x0000000000CC0000-0x0000000000D7A000-memory.dmp

            Filesize

            744KB

          • memory/2544-134-0x0000000005CF0000-0x0000000006294000-memory.dmp

            Filesize

            5.6MB

          • memory/2544-135-0x00000000057E0000-0x0000000005872000-memory.dmp

            Filesize

            584KB

          • memory/2544-136-0x0000000005740000-0x000000000574A000-memory.dmp

            Filesize

            40KB

          • memory/2544-137-0x0000000005A30000-0x0000000005A40000-memory.dmp

            Filesize

            64KB

          • memory/2544-138-0x0000000005A30000-0x0000000005A40000-memory.dmp

            Filesize

            64KB

          • memory/2544-139-0x0000000007820000-0x00000000078BC000-memory.dmp

            Filesize

            624KB