Analysis

  • max time kernel
    93s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/04/2024, 01:04

General

  • Target
    2e48ee0fb3ddd63efeecd900a9d2bde365e2fe1fcbb3c43c882362ae935c5066.exe
  • Size 647KB
  • Sample240402-be5sescb3w
  • SHA256 2e48ee0fb3ddd63efeecd900a9d2bde365e2fe1fcbb3c43c882362ae935c5066
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • asyncrat

Version
  • AWS | 3Losh

Botnet
  • NEW_N4

C2
  • fttuvgt.ddnsfree.com:6969

  • fttuvgt.ddnsfree.com:6668

  • fttuvgt.ddnsfree.com:6667

Mutex
  • AsyncMutex_xxx342592

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Suspicious use of NtCreateUserProcessOtherParentProcess 2 IoCs
  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 1 IoCs
  • Detects file containing reversed ASEP Autorun registry keys 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates processes with tasklist 1 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
      PID:3296
      • C:\Users\Admin\AppData\Local\Temp\2e48ee0fb3ddd63efeecd900a9d2bde365e2fe1fcbb3c43c882362ae935c5066.exe
        "C:\Users\Admin\AppData\Local\Temp\2e48ee0fb3ddd63efeecd900a9d2bde365e2fe1fcbb3c43c882362ae935c5066.exe"
        2⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:2796
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c move Newsletters Newsletters.bat & Newsletters.bat
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3988
          • C:\Windows\SysWOW64\tasklist.exe
            tasklist
            4⤵
            • Enumerates processes with tasklist
            • Suspicious use of AdjustPrivilegeToken
            PID:4928
          • C:\Windows\SysWOW64\findstr.exe
            findstr /I "wrsa.exe opssvc.exe"
            4⤵
              PID:468
            • C:\Windows\SysWOW64\tasklist.exe
              tasklist
              4⤵
              • Enumerates processes with tasklist
              • Suspicious use of AdjustPrivilegeToken
              PID:5032
            • C:\Windows\SysWOW64\findstr.exe
              findstr /I "avastui.exe avgui.exe nswscsvc.exe sophoshealth.exe"
              4⤵
                PID:2608
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c md 4239
                4⤵
                  PID:4176
                • C:\Windows\SysWOW64\cmd.exe
                  cmd /c copy /b Reaching + Finest + Environmental + Tons + Symbols + Rice 4239\Soldiers.pif
                  4⤵
                    PID:5048
                  • C:\Windows\SysWOW64\cmd.exe
                    cmd /c copy /b Triangle + Ave + Tray 4239\o
                    4⤵
                      PID:1676
                    • C:\Users\Admin\AppData\Local\Temp\4239\Soldiers.pif
                      4239\Soldiers.pif 4239\o
                      4⤵
                      • Suspicious use of NtCreateUserProcessOtherParentProcess
                      • Executes dropped EXE
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of FindShellTrayWindow
                      • Suspicious use of SendNotifyMessage
                      • Suspicious use of WriteProcessMemory
                      PID:1252
                    • C:\Windows\SysWOW64\PING.EXE
                      ping -n 5 127.0.0.1
                      4⤵
                      • Runs ping.exe
                      PID:2212
                • C:\Windows\SysWOW64\cmd.exe
                  cmd /k echo [InternetShortcut] > "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FinestitchR.url" & echo URL="C:\Users\Admin\AppData\Local\StitchCraft Studios Co\FinestitchR.js" >> "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FinestitchR.url" & exit
                  2⤵
                  • Drops startup file
                  PID:5108
                • C:\Users\Admin\AppData\Local\Temp\4239\RegAsm.exe
                  C:\Users\Admin\AppData\Local\Temp\4239\RegAsm.exe
                  2⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of SetWindowsHookEx
                  PID:3312

              Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    RegAsm.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\4239\RegAsm.exe
                    • Size 63KB
                    • SHA256 c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc
                    • MD5 SHA1 SHA512 SSDEEP

                    Soldiers.pif

                    • Path C:\Users\Admin\AppData\Local\Temp\4239\Soldiers.pif
                    • Size 925KB
                    • SHA256 1300262a9d6bb6fcbefc0d299cce194435790e70b9c7b4a651e202e90a32fd49
                    • MD5 SHA1 SHA512 SSDEEP

                    o

                    • Path C:\Users\Admin\AppData\Local\Temp\4239\o
                    • Size 507KB
                    • SHA256 d2f8bad64a400060d230415a15f38449037907a6dd0e2d8e3f3b3c047a5be3f2
                    • MD5 SHA1 SHA512 SSDEEP

                    Ave

                    • Path C:\Users\Admin\AppData\Local\Temp\Ave
                    • Size 282KB
                    • SHA256 a49d011010b21fbe725d1f635e279285580a7d35e0eaf6d53ba8fc1d3bc8d8f0
                    • MD5 SHA1 SHA512 SSDEEP

                    Environmental

                    • Path C:\Users\Admin\AppData\Local\Temp\Environmental
                    • Size 184KB
                    • SHA256 8948e23d1611624abd88ef91d7ab119efe22896b8d12370ab2989d10f5fd8185
                    • MD5 SHA1 SHA512 SSDEEP

                    Finest

                    • Path C:\Users\Admin\AppData\Local\Temp\Finest
                    • Size 286KB
                    • SHA256 c848899356852d7cdd43ce525b0f464db427252ad07c539c064cb89a7bdbc5a2
                    • MD5 SHA1 SHA512 SSDEEP

                    Newsletters

                    • Path C:\Users\Admin\AppData\Local\Temp\Newsletters
                    • Size 26KB
                    • SHA256 8145332923bbb85ae2517c87b587b2de275219badf769fbc4064e3f76d1b26c0
                    • MD5 SHA1 SHA512 SSDEEP

                    Reaching

                    • Path C:\Users\Admin\AppData\Local\Temp\Reaching
                    • Size 292KB
                    • SHA256 520b4a0ca94396abb97ea723ed7d6dfa7880cce4013d2f998b3c83090295d254
                    • MD5 SHA1 SHA512 SSDEEP

                    Rice

                    • Path C:\Users\Admin\AppData\Local\Temp\Rice
                    • Size 41KB
                    • SHA256 047ee02962359b321112610fd3fa7ab416b028b9a2bee3cd7343de7641136aec
                    • MD5 SHA1 SHA512 SSDEEP

                    Symbols

                    • Path C:\Users\Admin\AppData\Local\Temp\Symbols
                    • Size 33KB
                    • SHA256 1927ede910ccaee4f846eb85401f63dc5860f5db5a66562b54853e59e437dd1e
                    • MD5 SHA1 SHA512 SSDEEP

                    Tons

                    • Path C:\Users\Admin\AppData\Local\Temp\Tons
                    • Size 89KB
                    • SHA256 72d8b933bbe09704f7f5200ba648fbc12a26b0cf7b232c2f7172c1dcf6b5abef
                    • MD5 SHA1 SHA512 SSDEEP

                    Tray

                    • Path C:\Users\Admin\AppData\Local\Temp\Tray
                    • Size 12KB
                    • SHA256 6718bc24cfddc6f194e5fe687fdeae9a189aaec7908a1545863cb1b43fdbf30c
                    • MD5 SHA1 SHA512 SSDEEP

                    Triangle

                    • Path C:\Users\Admin\AppData\Local\Temp\Triangle
                    • Size 213KB
                    • SHA256 86151ad1b478399281ea7d5de476f6e3709fa17383d44e607ef62df9fefe8ec1
                    • MD5 SHA1 SHA512 SSDEEP

                    memory/1252-25-0x0000000076EA1000-0x0000000076FC1000-memory.dmp

                    memory/1252-33-0x0000000001270000-0x0000000001271000-memory.dmp

                    memory/3312-35-0x0000000000FB0000-0x0000000000FC6000-memory.dmp

                    memory/3312-38-0x0000000073930000-0x00000000740E0000-memory.dmp

                    memory/3312-39-0x00000000055F0000-0x0000000005600000-memory.dmp

                    memory/3312-40-0x0000000005CB0000-0x0000000006254000-memory.dmp

                    memory/3312-41-0x00000000058A0000-0x0000000005932000-memory.dmp

                    memory/3312-42-0x0000000005880000-0x000000000588A000-memory.dmp

                    memory/3312-45-0x0000000006940000-0x00000000069DC000-memory.dmp

                    memory/3312-46-0x00000000069E0000-0x0000000006A46000-memory.dmp

                    memory/3312-47-0x0000000073930000-0x00000000740E0000-memory.dmp

                    memory/3312-48-0x00000000055F0000-0x0000000005600000-memory.dmp