Analysis

  • max time kernel
    134s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 2 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 29 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe
    "C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1044
    • 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:1192
    • 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:2508
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZjHuIvPfp" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD66A.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:1320
    • C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe
      "C:\Users\Admin\AppData\Local\Temp\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2864
      • 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:4316
        • 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:4804
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE762.tmp.bat""
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2028
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:3136
        • C:\Users\Admin\AppData\Roaming\Notes.exe
          "C:\Users\Admin\AppData\Roaming\Notes.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:3280
          • 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:784
          • 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:5100
          • C:\Windows\SysWOW64\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZjHuIvPfp" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2DC2.tmp"
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:4168
          • 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:2240

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c.exe.log

    Filesize

    1KB

    MD5

    8ec831f3e3a3f77e4a7b9cd32b48384c

    SHA1

    d83f09fd87c5bd86e045873c231c14836e76a05c

    SHA256

    7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

    SHA512

    26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

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

    Filesize

    2KB

    MD5

    968cb9309758126772781b83adb8a28f

    SHA1

    8da30e71accf186b2ba11da1797cf67f8f78b47c

    SHA256

    92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

    SHA512

    4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    18KB

    MD5

    2e9ef66aed54dc31891f46f6c6df0655

    SHA1

    20303212777d95c87034149e22f5f24dc1d026fc

    SHA256

    79e4579facf768daaedbc6586375d66fecfa64cd88bbe3db369f5c8d0ca5e452

    SHA512

    b5b512a50010fde7c489370735fd1c82127450c52b0ba80de1f6ab9e5f6e2168c71889f53a986ef9b3751ea3764aa3d9aecdd7db767e0acbe32b5a7e4115600a

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    18KB

    MD5

    df2633d83c7144bd06da2605c0340938

    SHA1

    095efb1c41213f706d6c50811ec9eb40a270dcba

    SHA256

    edce8c4bc1cccfcb23d5370588bdced3bdbffff9322a7c3a0b133bc7864efd3b

    SHA512

    7ebfab81cc3cefa59dd955fcb28d3cf72862950572f35860dd14c33e9c07cfebf51651c75d4acf78367faf57dd7cc6bd49d1068c99a0b8d28cc5f186011a3e35

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jnfzfpqv.1vg.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpD66A.tmp

    Filesize

    1KB

    MD5

    d8fa1e2e73a1f580ddf0b4251a9f42e7

    SHA1

    b64fe5c161eadef6fc468de9e27782270dc8be3c

    SHA256

    269cfcfb59434cf13d145070f50767e040bb92d3ad5cf217f236014f78cc6216

    SHA512

    07436c7c14b4f8f9f6e15a1dec52287cee04849a30903df8b1b5296e323075431257c5a2226b91e41f1b24fb4505384c907f72f5d61e509d57b06417f4010cb7

  • C:\Users\Admin\AppData\Local\Temp\tmpE762.tmp.bat

    Filesize

    149B

    MD5

    fde9bdd875acd88e4d8eaf1915f15cc0

    SHA1

    082d0907eb3682d82084929a6cce77e2392fdc06

    SHA256

    44e38b1b5a0600b5a0463ba5a3ffe268f6bc6dda7208a06ba85200024f012609

    SHA512

    7d46451a268db73c4f1311846b0e51cfdcd1bee3af11ff46ce6b43adf7aff70d0f1a549fb7a8b7eaea1134699399164b86a1e3450ee706f6f72b862df567bfc1

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

    Filesize

    663KB

    MD5

    7b05be5398ce2cbc424d40b82b8bb4fe

    SHA1

    6c158dc6c7324e5b76bb9d89916261c778c23f63

    SHA256

    472819b55a8804b4d8787f5e45cc9b1aeb1026d5819f06e91bbc022d53ccae5c

    SHA512

    ddb856adf6ddf8d8f696b48a1b5d27584be742bc9f47e4bf07b0dca101be9afa598a087d7bc8e5dc9c0d515d0e7333093ef4c597bd8d3197a2e340caf9da8257

  • memory/784-111-0x0000000005EF0000-0x0000000006244000-memory.dmp

    Filesize

    3.3MB

  • memory/784-134-0x0000000074F90000-0x0000000074FDC000-memory.dmp

    Filesize

    304KB

  • memory/784-123-0x00000000063F0000-0x000000000643C000-memory.dmp

    Filesize

    304KB

  • memory/784-144-0x0000000007910000-0x0000000007921000-memory.dmp

    Filesize

    68KB

  • memory/1044-47-0x00000000746B0000-0x0000000074E60000-memory.dmp

    Filesize

    7.7MB

  • memory/1044-8-0x0000000005AA0000-0x0000000005AAE000-memory.dmp

    Filesize

    56KB

  • memory/1044-7-0x00000000058C0000-0x00000000058D6000-memory.dmp

    Filesize

    88KB

  • memory/1044-9-0x0000000006920000-0x0000000006974000-memory.dmp

    Filesize

    336KB

  • memory/1044-4-0x0000000005540000-0x000000000554A000-memory.dmp

    Filesize

    40KB

  • memory/1044-6-0x00000000058F0000-0x000000000598C000-memory.dmp

    Filesize

    624KB

  • memory/1044-5-0x00000000746B0000-0x0000000074E60000-memory.dmp

    Filesize

    7.7MB

  • memory/1044-3-0x0000000005590000-0x0000000005622000-memory.dmp

    Filesize

    584KB

  • memory/1044-2-0x0000000005C70000-0x0000000006214000-memory.dmp

    Filesize

    5.6MB

  • memory/1044-0-0x00000000746BE000-0x00000000746BF000-memory.dmp

    Filesize

    4KB

  • memory/1044-1-0x0000000000AA0000-0x0000000000B48000-memory.dmp

    Filesize

    672KB

  • memory/1192-73-0x0000000006F70000-0x0000000007013000-memory.dmp

    Filesize

    652KB

  • memory/1192-20-0x00000000746B0000-0x0000000074E60000-memory.dmp

    Filesize

    7.7MB

  • memory/1192-46-0x00000000746B0000-0x0000000074E60000-memory.dmp

    Filesize

    7.7MB

  • memory/1192-14-0x0000000004800000-0x0000000004836000-memory.dmp

    Filesize

    216KB

  • memory/1192-50-0x0000000005E10000-0x0000000005E5C000-memory.dmp

    Filesize

    304KB

  • memory/1192-15-0x0000000004FB0000-0x00000000055D8000-memory.dmp

    Filesize

    6.2MB

  • memory/1192-72-0x0000000006F00000-0x0000000006F1E000-memory.dmp

    Filesize

    120KB

  • memory/1192-16-0x00000000746B0000-0x0000000074E60000-memory.dmp

    Filesize

    7.7MB

  • memory/1192-52-0x0000000074F40000-0x0000000074F8C000-memory.dmp

    Filesize

    304KB

  • memory/1192-51-0x0000000006F20000-0x0000000006F52000-memory.dmp

    Filesize

    200KB

  • memory/1192-17-0x0000000004CE0000-0x0000000004D02000-memory.dmp

    Filesize

    136KB

  • memory/1192-74-0x00000000070C0000-0x00000000070DA000-memory.dmp

    Filesize

    104KB

  • memory/1192-76-0x0000000007140000-0x000000000714A000-memory.dmp

    Filesize

    40KB

  • memory/1192-77-0x0000000007340000-0x00000000073D6000-memory.dmp

    Filesize

    600KB

  • memory/1192-78-0x00000000072C0000-0x00000000072D1000-memory.dmp

    Filesize

    68KB

  • memory/1192-19-0x0000000004EF0000-0x0000000004F56000-memory.dmp

    Filesize

    408KB

  • memory/1192-81-0x0000000007300000-0x0000000007314000-memory.dmp

    Filesize

    80KB

  • memory/1192-18-0x0000000004E80000-0x0000000004EE6000-memory.dmp

    Filesize

    408KB

  • memory/1192-22-0x00000000057E0000-0x0000000005B34000-memory.dmp

    Filesize

    3.3MB

  • memory/1192-88-0x00000000746B0000-0x0000000074E60000-memory.dmp

    Filesize

    7.7MB

  • memory/2508-75-0x0000000007730000-0x0000000007DAA000-memory.dmp

    Filesize

    6.5MB

  • memory/2508-79-0x0000000007310000-0x000000000731E000-memory.dmp

    Filesize

    56KB

  • memory/2508-87-0x00000000746B0000-0x0000000074E60000-memory.dmp

    Filesize

    7.7MB

  • memory/2508-23-0x00000000746B0000-0x0000000074E60000-memory.dmp

    Filesize

    7.7MB

  • memory/2508-83-0x0000000007400000-0x0000000007408000-memory.dmp

    Filesize

    32KB

  • memory/2508-48-0x00000000746B0000-0x0000000074E60000-memory.dmp

    Filesize

    7.7MB

  • memory/2508-80-0x0000000007320000-0x0000000007334000-memory.dmp

    Filesize

    80KB

  • memory/2508-49-0x0000000005DC0000-0x0000000005DDE000-memory.dmp

    Filesize

    120KB

  • memory/2508-42-0x00000000746B0000-0x0000000074E60000-memory.dmp

    Filesize

    7.7MB

  • memory/2508-53-0x0000000074F40000-0x0000000074F8C000-memory.dmp

    Filesize

    304KB

  • memory/2508-82-0x0000000007420000-0x000000000743A000-memory.dmp

    Filesize

    104KB

  • memory/2864-44-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/3280-97-0x00000000057F0000-0x0000000005844000-memory.dmp

    Filesize

    336KB

  • memory/5100-124-0x0000000074F90000-0x0000000074FDC000-memory.dmp

    Filesize

    304KB