Analysis

  • max time kernel
    135s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/05/2023, 01:29

General

  • Target

    1240-55-0x0000000000370000-0x0000000000382000-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 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 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\1240-55-0x0000000000370000-0x0000000000382000-memory.exe
    "C:\Users\Admin\AppData\Local\Temp\1240-55-0x0000000000370000-0x0000000000382000-memory.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3476
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn 1240-55-0x0000000000370000-0x0000000000382000-memory /tr '"C:\Users\Admin\AppData\Roaming\microsafte.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1572
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /ru system /rl highest /tn 1240-55-0x0000000000370000-0x0000000000382000-memory /tr '"C:\Users\Admin\AppData\Roaming\microsafte.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:748
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE004.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1476
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:436
      • C:\Users\Admin\AppData\Roaming\microsafte.exe
        "C:\Users\Admin\AppData\Roaming\microsafte.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1156

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmpE004.tmp.bat

          Filesize

          154B

          MD5

          4ac1dd2cc7b2bc47577cb14c9f733d6a

          SHA1

          eeadef940caee9c16b93de6c4ce360524497e2b2

          SHA256

          b7fe65bd264f3f8ea4d9ce73040233efa7edb474f669bd44320a56b62b31a0bb

          SHA512

          5ade27ec7af9dc2246894dbd24fa27ab52517a669881e24a9ed56d50a4e9f553d67283e9a062181fcd4cdb0d47c870e773daa2c1277d70af1bef55c1a18b5378

        • 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/1156-143-0x000000001BFA0000-0x000000001BFB0000-memory.dmp

          Filesize

          64KB

        • memory/1156-144-0x000000001BFA0000-0x000000001BFB0000-memory.dmp

          Filesize

          64KB

        • memory/3476-133-0x0000000000BB0000-0x0000000000BC2000-memory.dmp

          Filesize

          72KB

        • memory/3476-134-0x000000001C4B0000-0x000000001C4C0000-memory.dmp

          Filesize

          64KB