Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-12-2024 16:15

General

  • Target

    file.exe

  • Size

    3.6MB

  • MD5

    d3f515d42cf7e62738c596dc4ba9fdb9

  • SHA1

    f63216b18ab4265d9c0b3243ba491fcb74b1bac6

  • SHA256

    1e01e5c379d7504669a75f317c60c31297dc347792b9131fad73092a88383393

  • SHA512

    81462412b18e715f81499769c6e3a89cd612683151b7984452dac4f1e5b2e69b6a0fc6542103327e6e46668d9b2268502fcc98415c44a054f1168f7bc8fefb52

  • SSDEEP

    49152:TwWtZnTwCk7UHla796h+16eUMTycWaX/Ngvv1VlHIPIV/CdQvJuJ44wPcbErkcz3:TwwvYXUMmczWvnlo0KSj5L1Ln9

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

185.208.158.187:4449

Mutex

tnybaidkzovl

Attributes
  • delay

    10

  • install

    true

  • install_file

    NotepadUpdate.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Asyncrat family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 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
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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 12 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 30 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3980
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yRnixT.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4016
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yRnixT" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF56C.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:772
    • C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2712
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "NotepadUpdate" /tr '"C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe"' & exit
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4352
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /f /sc onlogon /rl highest /tn "NotepadUpdate" /tr '"C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe"'
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:4584
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2390.tmp.bat""
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4392
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:728
        • C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe
          "C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4028
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yRnixT.exe"
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3700
          • C:\Windows\SysWOW64\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yRnixT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6FAD.tmp"
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:4708
          • C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe
            "C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:1832

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\file.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

    852222b905cfbe6d6bde85985fec5c7a

    SHA1

    91d646ff70fef7e1e1386fd4697a38deea7131ee

    SHA256

    8a0b84f31885dde5d216f47d61134d235c808f46dbf7bffe7a6be72bec9d862f

    SHA512

    ce51cfc5574e9b56e5202d61f223443ddc12ff1e9cca647600fdb60266e8dfe6ab797778e64b7e9f84e83988bc61ee11d9681787423befcba82d4ff564b6501e

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_q2dsd12w.ubk.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmp2390.tmp.bat

    Filesize

    157B

    MD5

    421cee44d010e43ff40c371175db9ffd

    SHA1

    c8c13d280874a98bb33322d12984ebe8c9ba92de

    SHA256

    1e1eb957635e35e469f18af8e1e28b25e21c68111b8d5fd8913d6f37b4e4a939

    SHA512

    952d4a8ef061dc35bd8d048237610e255dfc5fc7cb455e1b468987ac9ed9f644a4518afa0d30b314847529e1914915bda6042d04390fc8d87eb03d8a009dc96f

  • C:\Users\Admin\AppData\Local\Temp\tmpF56C.tmp

    Filesize

    1KB

    MD5

    712a059c664ff73b44656d6954a7d45c

    SHA1

    4d2b6868a77c4265c214a182b89d7bca9ecd2540

    SHA256

    fe83b63ad95b9927db0c6545855a78138cceadaf807e00b408fec6e08f4cb5be

    SHA512

    ed64bfc1c1a92e79e80a8b3b1edf84779357bbc525cfd1c55a380505b53749711e6621edb07c155430527b574b05419217d209ea092044aa8148aa5612d18944

  • C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

    Filesize

    8B

    MD5

    cf759e4c5f14fe3eec41b87ed756cea8

    SHA1

    c27c796bb3c2fac929359563676f4ba1ffada1f5

    SHA256

    c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

    SHA512

    c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

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

    Filesize

    3.6MB

    MD5

    d3f515d42cf7e62738c596dc4ba9fdb9

    SHA1

    f63216b18ab4265d9c0b3243ba491fcb74b1bac6

    SHA256

    1e01e5c379d7504669a75f317c60c31297dc347792b9131fad73092a88383393

    SHA512

    81462412b18e715f81499769c6e3a89cd612683151b7984452dac4f1e5b2e69b6a0fc6542103327e6e46668d9b2268502fcc98415c44a054f1168f7bc8fefb52

  • memory/2712-71-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/2712-24-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB

  • memory/2712-67-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/2712-38-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/3700-105-0x0000000007820000-0x00000000078C3000-memory.dmp

    Filesize

    652KB

  • memory/3700-92-0x0000000006010000-0x0000000006364000-memory.dmp

    Filesize

    3.3MB

  • memory/3700-94-0x0000000006620000-0x000000000666C000-memory.dmp

    Filesize

    304KB

  • memory/3700-95-0x0000000070AE0000-0x0000000070B2C000-memory.dmp

    Filesize

    304KB

  • memory/3700-107-0x0000000007B50000-0x0000000007B64000-memory.dmp

    Filesize

    80KB

  • memory/3700-106-0x0000000007AF0000-0x0000000007B01000-memory.dmp

    Filesize

    68KB

  • memory/3980-3-0x0000000005350000-0x00000000053E2000-memory.dmp

    Filesize

    584KB

  • memory/3980-37-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/3980-10-0x000000000A840000-0x000000000A8DC000-memory.dmp

    Filesize

    624KB

  • memory/3980-9-0x0000000008080000-0x00000000080DC000-memory.dmp

    Filesize

    368KB

  • memory/3980-8-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/3980-7-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

    Filesize

    4KB

  • memory/3980-6-0x00000000056E0000-0x00000000056FE000-memory.dmp

    Filesize

    120KB

  • memory/3980-5-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/3980-4-0x0000000005400000-0x000000000540A000-memory.dmp

    Filesize

    40KB

  • memory/3980-2-0x0000000005900000-0x0000000005EA4000-memory.dmp

    Filesize

    5.6MB

  • memory/3980-1-0x0000000000860000-0x0000000000948000-memory.dmp

    Filesize

    928KB

  • memory/3980-0-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

    Filesize

    4KB

  • memory/4016-40-0x0000000005DE0000-0x0000000005DFE000-memory.dmp

    Filesize

    120KB

  • memory/4016-54-0x0000000007090000-0x0000000007133000-memory.dmp

    Filesize

    652KB

  • memory/4016-55-0x0000000007810000-0x0000000007E8A000-memory.dmp

    Filesize

    6.5MB

  • memory/4016-56-0x00000000071C0000-0x00000000071DA000-memory.dmp

    Filesize

    104KB

  • memory/4016-57-0x0000000007240000-0x000000000724A000-memory.dmp

    Filesize

    40KB

  • memory/4016-58-0x0000000007440000-0x00000000074D6000-memory.dmp

    Filesize

    600KB

  • memory/4016-59-0x00000000073C0000-0x00000000073D1000-memory.dmp

    Filesize

    68KB

  • memory/4016-60-0x00000000073F0000-0x00000000073FE000-memory.dmp

    Filesize

    56KB

  • memory/4016-61-0x0000000007400000-0x0000000007414000-memory.dmp

    Filesize

    80KB

  • memory/4016-62-0x0000000007500000-0x000000000751A000-memory.dmp

    Filesize

    104KB

  • memory/4016-63-0x00000000074E0000-0x00000000074E8000-memory.dmp

    Filesize

    32KB

  • memory/4016-66-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/4016-53-0x0000000006E20000-0x0000000006E3E000-memory.dmp

    Filesize

    120KB

  • memory/4016-43-0x0000000075530000-0x000000007557C000-memory.dmp

    Filesize

    304KB

  • memory/4016-42-0x0000000006E40000-0x0000000006E72000-memory.dmp

    Filesize

    200KB

  • memory/4016-41-0x0000000006390000-0x00000000063DC000-memory.dmp

    Filesize

    304KB

  • memory/4016-27-0x0000000005810000-0x0000000005B64000-memory.dmp

    Filesize

    3.3MB

  • memory/4016-23-0x00000000057A0000-0x0000000005806000-memory.dmp

    Filesize

    408KB

  • memory/4016-22-0x0000000005730000-0x0000000005796000-memory.dmp

    Filesize

    408KB

  • memory/4016-21-0x0000000004E40000-0x0000000004E62000-memory.dmp

    Filesize

    136KB

  • memory/4016-20-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/4016-18-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/4016-16-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/4016-17-0x0000000004ED0000-0x00000000054F8000-memory.dmp

    Filesize

    6.2MB

  • memory/4016-15-0x0000000004860000-0x0000000004896000-memory.dmp

    Filesize

    216KB