Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    19/03/2024, 18:47

General

  • Target
    1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe
  • Size 299KB
  • Sample240319-xffetabe77
  • SHA256 1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Extracted

Family
  • asyncrat

Version
  • 0.5.7B

Botnet
  • Default

C2
  • 91.193.75.132:9191

Mutex
  • AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    images.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • 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).

  • Creates scheduled task(s) 1 TTPs 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 27 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe
    "C:\Users\Admin\AppData\Local\Temp\1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5104
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\UiKVWpFsayx.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2136
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UiKVWpFsayx" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF4EF.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:5036
    • C:\Users\Admin\AppData\Local\Temp\1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe
      "C:\Users\Admin\AppData\Local\Temp\1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe"
      2⤵
        PID:2960
      • C:\Users\Admin\AppData\Local\Temp\1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe
        "C:\Users\Admin\AppData\Local\Temp\1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe"
        2⤵
          PID:1908
        • C:\Users\Admin\AppData\Local\Temp\1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe
          "C:\Users\Admin\AppData\Local\Temp\1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe"
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2276
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "images" /tr '"C:\Users\Admin\AppData\Roaming\images.exe"' & exit
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:740
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /f /sc onlogon /rl highest /tn "images" /tr '"C:\Users\Admin\AppData\Roaming\images.exe"'
              4⤵
              • Creates scheduled task(s)
              PID:4580
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5A8.tmp.bat""
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:1460
            • C:\Windows\SysWOW64\timeout.exe
              timeout 3
              4⤵
              • Delays execution with timeout.exe
              PID:3052
            • C:\Users\Admin\AppData\Roaming\images.exe
              "C:\Users\Admin\AppData\Roaming\images.exe"
              4⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:1492
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\UiKVWpFsayx.exe"
                5⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:2340
              • C:\Windows\SysWOW64\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UiKVWpFsayx" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9EFA.tmp"
                5⤵
                • Creates scheduled task(s)
                PID:3676
              • C:\Users\Admin\AppData\Roaming\images.exe
                "C:\Users\Admin\AppData\Roaming\images.exe"
                5⤵
                • Executes dropped EXE
                • Suspicious use of AdjustPrivilegeToken
                PID:3728

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe.log

            • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e.exe.log
            • Size 1KB
            • SHA256 4c17576f64dea465c45a50573ee41771f7be9962ab2d07f961af4df5589bdcce
            • MD5 SHA1 SHA512

            powershell.exe.log

            • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
            • Size 2KB
            • SHA256 dc7e205caab489a373eeb9346e1a32a1a12fd4ce710921e3829e39aa020fe709
            • MD5 SHA1 SHA512

            StartupProfileData-NonInteractive

            • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
            • Size 19KB
            • SHA256 4c08e1f245c8e664282b15ab25cf4b063a7252de39f8fa9bf8257b60c3b4c17c
            • MD5 SHA1 SHA512 SSDEEP

            __PSScriptPolicyTest_tra50nns.r10.ps1

            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tra50nns.r10.ps1
            • Size 60B
            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
            • MD5 SHA1 SHA512

            tmp5A8.tmp.bat

            • Path C:\Users\Admin\AppData\Local\Temp\tmp5A8.tmp.bat
            • Size 149B
            • SHA256 647c64513715117344d1b996746d9b281fcd6d401947e2ab33714c8e12152efd
            • MD5 SHA1 SHA512

            tmpF4EF.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\tmpF4EF.tmp
            • Size 1KB
            • SHA256 9678c16595c7ef811a608a531616048f410f97511fc519d8b5f842882a2103d9
            • MD5 SHA1 SHA512

            images.exe

            • Path C:\Users\Admin\AppData\Roaming\images.exe
            • Size 299KB
            • SHA256 1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e
            • MD5 SHA1 SHA512 SSDEEP

            memory/1492-78-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/1492-76-0x00000000057E0000-0x00000000057F0000-memory.dmp

            memory/1492-75-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/1492-77-0x0000000005A90000-0x0000000005AA4000-memory.dmp

            memory/1492-79-0x00000000057E0000-0x00000000057F0000-memory.dmp

            memory/1492-80-0x00000000071F0000-0x0000000007228000-memory.dmp

            memory/1492-91-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/2136-56-0x0000000007D30000-0x0000000007DC6000-memory.dmp

            memory/2136-15-0x0000000002F60000-0x0000000002F96000-memory.dmp

            memory/2136-18-0x00000000059A0000-0x0000000005FCA000-memory.dmp

            memory/2136-17-0x0000000002F10000-0x0000000002F20000-memory.dmp

            memory/2136-16-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/2136-65-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/2136-20-0x0000000002F10000-0x0000000002F20000-memory.dmp

            memory/2136-30-0x0000000006100000-0x0000000006122000-memory.dmp

            memory/2136-34-0x00000000061D0000-0x0000000006236000-memory.dmp

            memory/2136-35-0x0000000006280000-0x00000000062E6000-memory.dmp

            memory/2136-36-0x0000000006370000-0x00000000066C7000-memory.dmp

            memory/2136-37-0x0000000006740000-0x000000000675E000-memory.dmp

            memory/2136-38-0x0000000006780000-0x00000000067CC000-memory.dmp

            memory/2136-39-0x000000007F530000-0x000000007F540000-memory.dmp

            memory/2136-40-0x0000000006D20000-0x0000000006D54000-memory.dmp

            memory/2136-50-0x0000000007910000-0x000000000792E000-memory.dmp

            memory/2136-51-0x0000000002F10000-0x0000000002F20000-memory.dmp

            memory/2136-41-0x0000000073190000-0x00000000731DC000-memory.dmp

            memory/2136-52-0x0000000007940000-0x00000000079E4000-memory.dmp

            memory/2136-53-0x00000000080E0000-0x000000000875A000-memory.dmp

            memory/2136-54-0x0000000007AA0000-0x0000000007ABA000-memory.dmp

            memory/2136-55-0x0000000007B20000-0x0000000007B2A000-memory.dmp

            memory/2136-61-0x0000000007DE0000-0x0000000007DE8000-memory.dmp

            memory/2136-57-0x0000000007CB0000-0x0000000007CC1000-memory.dmp

            memory/2136-58-0x0000000007CE0000-0x0000000007CEE000-memory.dmp

            memory/2136-60-0x0000000007DF0000-0x0000000007E0A000-memory.dmp

            memory/2136-59-0x0000000007CF0000-0x0000000007D05000-memory.dmp

            memory/2276-71-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/2276-62-0x0000000005190000-0x00000000051A0000-memory.dmp

            memory/2276-23-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/2276-21-0x0000000000400000-0x0000000000412000-memory.dmp

            memory/2340-102-0x00000000067A0000-0x00000000067EC000-memory.dmp

            memory/2340-100-0x0000000005E90000-0x00000000061E7000-memory.dmp

            memory/2340-119-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/2340-117-0x00000000079C0000-0x00000000079D5000-memory.dmp

            memory/2340-116-0x0000000007990000-0x00000000079A1000-memory.dmp

            memory/2340-115-0x0000000002BF0000-0x0000000002C00000-memory.dmp

            memory/2340-113-0x00000000076D0000-0x0000000007774000-memory.dmp

            memory/2340-114-0x0000000002BF0000-0x0000000002C00000-memory.dmp

            memory/2340-104-0x0000000074FF0000-0x000000007503C000-memory.dmp

            memory/2340-103-0x000000007FC70000-0x000000007FC80000-memory.dmp

            memory/2340-84-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/2340-86-0x0000000002BF0000-0x0000000002C00000-memory.dmp

            memory/2340-85-0x0000000002BF0000-0x0000000002C00000-memory.dmp

            memory/3728-90-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/3728-120-0x0000000005820000-0x0000000005830000-memory.dmp

            memory/5104-5-0x0000000004B90000-0x0000000004B9A000-memory.dmp

            memory/5104-0-0x0000000000070000-0x00000000000C2000-memory.dmp

            memory/5104-1-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/5104-3-0x0000000004C20000-0x0000000004CB2000-memory.dmp

            memory/5104-4-0x0000000004B20000-0x0000000004B30000-memory.dmp

            memory/5104-2-0x0000000005130000-0x00000000056D6000-memory.dmp

            memory/5104-6-0x0000000004D00000-0x0000000004D14000-memory.dmp

            memory/5104-7-0x00000000746E0000-0x0000000074E91000-memory.dmp

            memory/5104-8-0x0000000004B20000-0x0000000004B30000-memory.dmp

            memory/5104-9-0x0000000006160000-0x00000000061FC000-memory.dmp

            memory/5104-10-0x0000000006130000-0x0000000006168000-memory.dmp

            memory/5104-24-0x00000000746E0000-0x0000000074E91000-memory.dmp