Analysis

  • max time kernel
    37s
  • max time network
    134s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    05/05/2023, 01:30

General

  • Target

    1444-55-0x00000000003B0000-0x00000000003C2000-memory.exe

  • Size

    72KB

  • MD5

    6ddcee176a864b67cd4cff577c28cdf1

  • SHA1

    c69292e4ec9128ccc4de351f39a48d1bd3f439e6

  • SHA256

    5bf8102edefe3e55a0e33207fdbf359f71477f70856745bc4e626cc72d498cd6

  • SHA512

    3482d4da78c96ca3d404d97547ee21ff1651339bb5ae01f107399705f6a73bbd26e1f0a0761b0625427373cc688812e43483774a754c1f9a0bce9ff16e322ff4

  • SSDEEP

    768:8oXyvMOgs2/W4G9mxNf13wRCn1OCDyjb5gr3irIWSpo7niClZR2tYcFmVc6K:8oX4MOg/PAUVebWrSvSpurRKmVcl

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.6D

Botnet

Default

C2

seznam.zapto.org:6606

seznam.zapto.org:7707

seznam.zapto.org:8808

milla.publicvm.com:6606

milla.publicvm.com:7707

milla.publicvm.com:8808

Mutex

ycwqfldbyykswbufnmb

Attributes
  • delay

    5

  • install

    true

  • install_file

    microsafte.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 5 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 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 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 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\1444-55-0x00000000003B0000-0x00000000003C2000-memory.exe
    "C:\Users\Admin\AppData\Local\Temp\1444-55-0x00000000003B0000-0x00000000003C2000-memory.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn 1444-55-0x00000000003B0000-0x00000000003C2000-memory /tr '"C:\Users\Admin\AppData\Roaming\microsafte.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:684
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /ru system /rl highest /tn 1444-55-0x00000000003B0000-0x00000000003C2000-memory /tr '"C:\Users\Admin\AppData\Roaming\microsafte.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:1720
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp539D.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:584
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1500
      • C:\Users\Admin\AppData\Roaming\microsafte.exe
        "C:\Users\Admin\AppData\Roaming\microsafte.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1496

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp539D.tmp.bat

          Filesize

          154B

          MD5

          9d7c17510bd9a7f5d147bba191ec8f3d

          SHA1

          5ea7ef7a2d6231ce9bc2e3579b62799e13e6a7fc

          SHA256

          fde6a38b85d06cc994bab5f13548f4e6e045c26b727ba7ec387b52fcd721bdca

          SHA512

          7e7bebedff0a353afd4fd012afee93368f76f7bfca036d60596039b02c7fc2005ccdf0fd8b2d0c4306ea2887633fb838a2179a7eb9410e2d4b79a86b98e931d8

        • C:\Users\Admin\AppData\Local\Temp\tmp539D.tmp.bat

          Filesize

          154B

          MD5

          9d7c17510bd9a7f5d147bba191ec8f3d

          SHA1

          5ea7ef7a2d6231ce9bc2e3579b62799e13e6a7fc

          SHA256

          fde6a38b85d06cc994bab5f13548f4e6e045c26b727ba7ec387b52fcd721bdca

          SHA512

          7e7bebedff0a353afd4fd012afee93368f76f7bfca036d60596039b02c7fc2005ccdf0fd8b2d0c4306ea2887633fb838a2179a7eb9410e2d4b79a86b98e931d8

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

          Filesize

          72KB

          MD5

          6ddcee176a864b67cd4cff577c28cdf1

          SHA1

          c69292e4ec9128ccc4de351f39a48d1bd3f439e6

          SHA256

          5bf8102edefe3e55a0e33207fdbf359f71477f70856745bc4e626cc72d498cd6

          SHA512

          3482d4da78c96ca3d404d97547ee21ff1651339bb5ae01f107399705f6a73bbd26e1f0a0761b0625427373cc688812e43483774a754c1f9a0bce9ff16e322ff4

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

          Filesize

          72KB

          MD5

          6ddcee176a864b67cd4cff577c28cdf1

          SHA1

          c69292e4ec9128ccc4de351f39a48d1bd3f439e6

          SHA256

          5bf8102edefe3e55a0e33207fdbf359f71477f70856745bc4e626cc72d498cd6

          SHA512

          3482d4da78c96ca3d404d97547ee21ff1651339bb5ae01f107399705f6a73bbd26e1f0a0761b0625427373cc688812e43483774a754c1f9a0bce9ff16e322ff4

        • memory/1496-68-0x0000000000E60000-0x0000000000E72000-memory.dmp

          Filesize

          72KB

        • memory/1496-69-0x00000000002E0000-0x0000000000360000-memory.dmp

          Filesize

          512KB

        • memory/1496-87-0x00000000002E0000-0x0000000000360000-memory.dmp

          Filesize

          512KB

        • memory/1724-54-0x0000000001070000-0x0000000001082000-memory.dmp

          Filesize

          72KB

        • memory/1724-55-0x0000000000F10000-0x0000000000F90000-memory.dmp

          Filesize

          512KB