Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/11/2024, 21:19

General

  • Target

    Fspufeg_LetThereBeCarnage.exe

  • Size

    176KB

  • MD5

    b1fe8bd5e597eca5c117126d841620a8

  • SHA1

    096038125468f8eb1e91e62233f7569b9ac4e4fa

  • SHA256

    60f8e250f3c0fbbc3088cb762a14322532a4c183e86287532534d38f2f2e79e7

  • SHA512

    4823e1df90e4de43e31db17dc750f2f7f4cd4948a43e2287d7982eaec6fcc7a612e1e2b543ef6391ff09b1fb02cd95953f5732041922adea6b65384c47f2006c

  • SSDEEP

    3072:pUdsvwe0jmKhy2BQ9bwjjdyqyqA0FCWfJz6gUlDCfz6:Mf5hy2BQ9bmjdyqyqBFCWfJzGim

Malware Config

Signatures

  • AsyncRat

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

  • Asyncrat family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

    Using powershell.exe command.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Obfuscated Files or Information: Command Obfuscation 1 TTPs

    Adversaries may obfuscate content during command execution to impede detection.

  • Enumerates physical storage devices 1 TTPs

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

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

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Fspufeg_LetThereBeCarnage.exe
    "C:\Users\Admin\AppData\Local\Temp\Fspufeg_LetThereBeCarnage.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2540
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn DJnogssshst /tr 'C:\Users\Admin\AppData\Roaming\DJnogssshst.exe' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1360
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn DJnogssshst /tr 'C:\Users\Admin\AppData\Roaming\DJnogssshst.exe'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:8
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCB01.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4904
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3028
      • C:\Users\Admin\AppData\Roaming\DJnogssshst.exe
        C:\Users\Admin\AppData\Roaming\DJnogssshst.exe
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3620
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /k start /b powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPathC:\Users\Admin\AppData\Roaming\DJnogssshst.exe & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:456
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPathC:\Users\Admin\AppData\Roaming\DJnogssshst.exe
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1516
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /k start /b powershell.exe Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2 & powershell.exe -inputformat none -outputformat none -NonInteractive -Command \"Add-MpPreference -ExclusionPath USERPROFILE\\AppData\" & powershell.exe -inputformat none -outputformat none -NonInteractive -Command \"Add-MpPreference -ExclusionPath USERPROFILE\\Local\" & powershell.exe -command \"Set-MpPreference -ExclusionExtension .exe\" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1492
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell.exe Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4400
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell Set-MpPreference -SubmitSamplesConsent 2
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4280
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell.exe -inputformat none -outputformat none -NonInteractive -Command \"Add-MpPreference -ExclusionPath USERPROFILE\\AppData\"
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of AdjustPrivilegeToken
            PID:2136
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell.exe -inputformat none -outputformat none -NonInteractive -Command \"Add-MpPreference -ExclusionPath USERPROFILE\\Local\"
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of AdjustPrivilegeToken
            PID:1632
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell.exe -command \"Set-MpPreference -ExclusionExtension .exe\"
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of AdjustPrivilegeToken
            PID:1520
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" -encodedCommand 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
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1668

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2KB

    MD5

    d85ba6ff808d9e5444a4b369f5bc2730

    SHA1

    31aa9d96590fff6981b315e0b391b575e4c0804a

    SHA256

    84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

    SHA512

    8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

    Filesize

    944B

    MD5

    77d622bb1a5b250869a3238b9bc1402b

    SHA1

    d47f4003c2554b9dfc4c16f22460b331886b191b

    SHA256

    f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

    SHA512

    d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

    Filesize

    948B

    MD5

    217d9191dfd67252cef23229676c9eda

    SHA1

    80d940b01c28e3933b9d68b3e567adc2bac1289f

    SHA256

    e64811c3e57476bb644539824034cabe2cabcb88941122193e2af328f5eb2133

    SHA512

    86767aa3c0eec425b7c6dbfd70a4a334fb5b1227c05fb06fbb3845e7b6974008386276f441c8e66e2bf9b0ae0a76133c4e5602211788cd702eaeadd12c5ff757

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

    Filesize

    1KB

    MD5

    cc88f379beccf096b213ed725d6030cc

    SHA1

    b5cfe4a0a0d6905ee4c393c2a86c6d4534625b9e

    SHA256

    a401be34a47352c4ea50c723eaac8256dfdcc7108b46b9cb615377509a7f2191

    SHA512

    896ddfba528b542ff16abccc426cbcf23de7a77ce987b420343b60f7af61ed1194b6e7cffa3a1bf134affcef53e758518609cd0cdc42176513cdcf72a2bd9e09

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

    Filesize

    64B

    MD5

    235a8eb126d835efb2e253459ab8b089

    SHA1

    293fbf68e6726a5a230c3a42624c01899e35a89f

    SHA256

    5ffd4a816ae5d1c1a8bdc51d2872b7dd99e9c383c88001d303a6f64a77773686

    SHA512

    a83d17203b581491e47d65131e1efc8060ff04d1852e3415fc0a341c6a9691ef9f4cf4dd29d2f6d0032a49f2ba4bd36c35b3f472f0ce5f78f4bb139124760e92

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

    Filesize

    64B

    MD5

    446dd1cf97eaba21cf14d03aebc79f27

    SHA1

    36e4cc7367e0c7b40f4a8ace272941ea46373799

    SHA256

    a7de5177c68a64bd48b36d49e2853799f4ebcfa8e4761f7cc472f333dc5f65cf

    SHA512

    a6d754709f30b122112ae30e5ab22486393c5021d33da4d1304c061863d2e1e79e8aeb029cae61261bb77d0e7becd53a7b0106d6ea4368b4c302464e3d941cf7

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_b2mevti0.gvr.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpCB01.tmp.bat

    Filesize

    149B

    MD5

    0bbf29293973857c03fb92e9a26b5113

    SHA1

    2def6dc13d697e05001f0f5d2ac6f206c580b1c4

    SHA256

    35ba21661edd6bcdc972a8545066219295152d2964cefc082b95a48e4956b948

    SHA512

    1e31a77aca30f5026c67c8ccc808efce158f58bfae0b0cc7fbe92ba407748bcbe428ec80261de89103975749fa3a5f9c3753163de8b5b3de614cca188164c854

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

    Filesize

    176KB

    MD5

    b1fe8bd5e597eca5c117126d841620a8

    SHA1

    096038125468f8eb1e91e62233f7569b9ac4e4fa

    SHA256

    60f8e250f3c0fbbc3088cb762a14322532a4c183e86287532534d38f2f2e79e7

    SHA512

    4823e1df90e4de43e31db17dc750f2f7f4cd4948a43e2287d7982eaec6fcc7a612e1e2b543ef6391ff09b1fb02cd95953f5732041922adea6b65384c47f2006c

  • memory/1516-23-0x000001B7DFB00000-0x000001B7DFB22000-memory.dmp

    Filesize

    136KB

  • memory/2540-0-0x00007FFB497F3000-0x00007FFB497F5000-memory.dmp

    Filesize

    8KB

  • memory/2540-9-0x00007FFB497F0000-0x00007FFB4A2B1000-memory.dmp

    Filesize

    10.8MB

  • memory/2540-4-0x00007FFB497F0000-0x00007FFB4A2B1000-memory.dmp

    Filesize

    10.8MB

  • memory/2540-3-0x00007FFB497F3000-0x00007FFB497F5000-memory.dmp

    Filesize

    8KB

  • memory/2540-2-0x00007FFB497F0000-0x00007FFB4A2B1000-memory.dmp

    Filesize

    10.8MB

  • memory/2540-1-0x0000000000710000-0x0000000000740000-memory.dmp

    Filesize

    192KB