Analysis

  • max time kernel
    138s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    06-08-2024 01:35

General

  • Target

    472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe

  • Size

    663KB

  • MD5

    7b05be5398ce2cbc424d40b82b8bb4fe

  • SHA1

    6c158dc6c7324e5b76bb9d89916261c778c23f63

  • SHA256

    472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c

  • SHA512

    ddb856adf6ddf8d8f696b48a1b5d27584be742bc9f47e4bf07b0dca101be9afa598a087d7bc8e5dc9c0d515d0e7333093ef4c597bd8d3197a2e340caf9da8257

  • SSDEEP

    12288:fU3929BC4rqhpqBHIA01a29EprIHAJp3UadAAHkR:fU89BNuhaoEprIHAJpkoAr

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

5.252.165.55:1986

Mutex

AsyncMutex_5SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    Notes.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 14 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe
    "C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2060
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2832
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ZjHuIvPfp.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2828
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZjHuIvPfp" /XML "C:\Users\Admin\AppData\Local\Temp\tmp362D.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2368
    • C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe
      "C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe"
      2⤵
        PID:3040
      • C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe
        "C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe"
        2⤵
          PID:2576
        • C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe
          "C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe"
          2⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1880
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Notes" /tr '"C:\Users\Admin\AppData\Roaming\Notes.exe"' & exit
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:1568
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /f /sc onlogon /rl highest /tn "Notes" /tr '"C:\Users\Admin\AppData\Roaming\Notes.exe"'
              4⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:1896
          • C:\Windows\SysWOW64\cmd.exe
            cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp4663.tmp.bat""
            3⤵
            • Loads dropped DLL
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:1552
            • C:\Windows\SysWOW64\timeout.exe
              timeout 3
              4⤵
              • System Location Discovery: System Language Discovery
              • Delays execution with timeout.exe
              PID:1424
            • C:\Users\Admin\AppData\Roaming\Notes.exe
              "C:\Users\Admin\AppData\Roaming\Notes.exe"
              4⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:656
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Notes.exe"
                5⤵
                • Command and Scripting Interpreter: PowerShell
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:2144
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ZjHuIvPfp.exe"
                5⤵
                • Command and Scripting Interpreter: PowerShell
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1220
              • C:\Windows\SysWOW64\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZjHuIvPfp" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8C0A.tmp"
                5⤵
                • System Location Discovery: System Language Discovery
                • Scheduled Task/Job: Scheduled Task
                PID:2472
              • C:\Users\Admin\AppData\Roaming\Notes.exe
                "C:\Users\Admin\AppData\Roaming\Notes.exe"
                5⤵
                • Executes dropped EXE
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                PID:2108

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\tmp362D.tmp

        Filesize

        1KB

        MD5

        4e042dbb4a2a1bbc0b9d08502d268166

        SHA1

        80457a8b40e3cbc0be0acc5c035787ad1bb9022e

        SHA256

        7b1ea4f0bce2d10b9b3fe89bac5f63d4891ac6f0d7776c3fa5a85864077d395a

        SHA512

        55ebc475c16ec9a661b509023e5e9c33b7f7569900cd15b3e0fdb044c3cbbfa65094614059abc6d9e94583a945914a7f5c206de6bdaeaa9aa391d57d88388b6e

      • C:\Users\Admin\AppData\Local\Temp\tmp4663.tmp.bat

        Filesize

        149B

        MD5

        e1f69db62b71971904ec1f27035cd9b6

        SHA1

        60bc759da481830100cb095f9409790509a2f464

        SHA256

        2a998c8da8b6102d3770cd253a08b696af31c236fe2d2b1313581cf8d315b308

        SHA512

        a687d1ba9bab24eff2742a4bf0b3abeb721612d942c012517d2699e704a4875708ad5e3d4ce5e46cd9971d0b9c49de8e7a4f4205efb471cbd986e2cee5d78c18

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

        Filesize

        7KB

        MD5

        cf18c077de9b88eeff1c5b384fdb71c1

        SHA1

        d5fadfb386a99a3251d887eefb5a53fe7c0dbe03

        SHA256

        afc27a5824bc89cc896c9024ea23a932a16187117fce50081629efce003c0ebb

        SHA512

        8904cf5ebaea067b552c79b45d4f915268f7c950dd9d2b9d8bce9e5f6d5947f8665f411b7804044bf6dd548a4292b20cb19714f3426da48c878bc48ae63796af

      • \Users\Admin\AppData\Roaming\Notes.exe

        Filesize

        663KB

        MD5

        7b05be5398ce2cbc424d40b82b8bb4fe

        SHA1

        6c158dc6c7324e5b76bb9d89916261c778c23f63

        SHA256

        472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c

        SHA512

        ddb856adf6ddf8d8f696b48a1b5d27584be742bc9f47e4bf07b0dca101be9afa598a087d7bc8e5dc9c0d515d0e7333093ef4c597bd8d3197a2e340caf9da8257

      • memory/656-43-0x00000000013B0000-0x0000000001458000-memory.dmp

        Filesize

        672KB

      • memory/1880-24-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1880-18-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1880-20-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1880-22-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1880-29-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1880-28-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1880-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1880-27-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/2060-3-0x0000000000590000-0x00000000005A6000-memory.dmp

        Filesize

        88KB

      • memory/2060-5-0x0000000000770000-0x00000000007C4000-memory.dmp

        Filesize

        336KB

      • memory/2060-2-0x0000000074170000-0x000000007485E000-memory.dmp

        Filesize

        6.9MB

      • memory/2060-0-0x000000007417E000-0x000000007417F000-memory.dmp

        Filesize

        4KB

      • memory/2060-4-0x0000000000410000-0x000000000041E000-memory.dmp

        Filesize

        56KB

      • memory/2060-1-0x0000000000250000-0x00000000002F8000-memory.dmp

        Filesize

        672KB

      • memory/2060-30-0x0000000074170000-0x000000007485E000-memory.dmp

        Filesize

        6.9MB

      • memory/2108-65-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2108-70-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/2108-68-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB