Resubmissions

30/04/2023, 21:56

230430-1tvcnsfb3y 10

30/04/2023, 21:52

230430-1q9yyseh7w 10

Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/04/2023, 21:52

General

  • Target

    Swiftfn.exe

  • Size

    47KB

  • MD5

    25d7952b3e8c9f0872ecf4f099cea1a2

  • SHA1

    976e307d3fc015452e70acd29ebddef0d8823fac

  • SHA256

    7fb468df5b46d1eb0f26e737c515a5a10794b84c9193628efb71c9c32fe8edc1

  • SHA512

    f81102833efd450be231d238f3065cf3d5cb9ae6c60f0a4e6b057ffd4c78a2767b0fd8aff54e0bb08ebdf5b5da293f622e68c4874776f0fa25adfd639ca4f3eb

  • SSDEEP

    768:sJCO9ILoeck+riPUl5kJN/QisVF8YbWgTgDaJivEgK/JDqVc6KN:sJ588kqFzbJga4nkJDqVclN

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

dom45x.duckdns.org:62180

Mutex

DcRatMutex_qwqdanchun

Attributes
  • delay

    1

  • install

    true

  • install_file

    Runtime Broker.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).

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • 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
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 38 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 42 IoCs
  • Suspicious use of SendNotifyMessage 41 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\Swiftfn.exe
    "C:\Users\Admin\AppData\Local\Temp\Swiftfn.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1820
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Runtime Broker" /tr '"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3944
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Runtime Broker" /tr '"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:2240
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpDDE1.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:228
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1460
      • C:\Users\Admin\AppData\Roaming\Runtime Broker.exe
        "C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
        3⤵
        • Executes dropped EXE
        • Modifies system certificate store
        • Suspicious use of AdjustPrivilegeToken
        PID:4452
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:4212

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmpDDE1.tmp.bat

          Filesize

          158B

          MD5

          790a6381e2ecbda785cbd8c83e2c6ac3

          SHA1

          81520165554b05e4b57a7361e62726795d891019

          SHA256

          2c9a846d04fefaeaa6cc26498514b2594f299b33e617b4a385a37453c7092015

          SHA512

          4be5d4b1ea824d998c725ca683a68f4ad479b0d00cd543385b077649ea9a4e8a8b4bddb20da2db6caf3d56ce9000996f5cb4476e7ea4e01c4559b4082f5b2007

        • C:\Users\Admin\AppData\Roaming\Runtime Broker.exe

          Filesize

          47KB

          MD5

          25d7952b3e8c9f0872ecf4f099cea1a2

          SHA1

          976e307d3fc015452e70acd29ebddef0d8823fac

          SHA256

          7fb468df5b46d1eb0f26e737c515a5a10794b84c9193628efb71c9c32fe8edc1

          SHA512

          f81102833efd450be231d238f3065cf3d5cb9ae6c60f0a4e6b057ffd4c78a2767b0fd8aff54e0bb08ebdf5b5da293f622e68c4874776f0fa25adfd639ca4f3eb

        • C:\Users\Admin\AppData\Roaming\Runtime Broker.exe

          Filesize

          47KB

          MD5

          25d7952b3e8c9f0872ecf4f099cea1a2

          SHA1

          976e307d3fc015452e70acd29ebddef0d8823fac

          SHA256

          7fb468df5b46d1eb0f26e737c515a5a10794b84c9193628efb71c9c32fe8edc1

          SHA512

          f81102833efd450be231d238f3065cf3d5cb9ae6c60f0a4e6b057ffd4c78a2767b0fd8aff54e0bb08ebdf5b5da293f622e68c4874776f0fa25adfd639ca4f3eb

        • memory/1820-133-0x0000000000850000-0x0000000000862000-memory.dmp

          Filesize

          72KB

        • memory/1820-134-0x000000001BF90000-0x000000001BFA0000-memory.dmp

          Filesize

          64KB

        • memory/4212-146-0x000001F569DE0000-0x000001F569DE1000-memory.dmp

          Filesize

          4KB

        • memory/4212-154-0x000001F569DE0000-0x000001F569DE1000-memory.dmp

          Filesize

          4KB

        • memory/4212-145-0x000001F569DE0000-0x000001F569DE1000-memory.dmp

          Filesize

          4KB

        • memory/4212-162-0x000001F56ADD0000-0x000001F56AF79000-memory.dmp

          Filesize

          1.7MB

        • memory/4212-150-0x000001F569DE0000-0x000001F569DE1000-memory.dmp

          Filesize

          4KB

        • memory/4212-156-0x000001F569DE0000-0x000001F569DE1000-memory.dmp

          Filesize

          4KB

        • memory/4212-155-0x000001F569DE0000-0x000001F569DE1000-memory.dmp

          Filesize

          4KB

        • memory/4212-144-0x000001F569DE0000-0x000001F569DE1000-memory.dmp

          Filesize

          4KB

        • memory/4212-153-0x000001F569DE0000-0x000001F569DE1000-memory.dmp

          Filesize

          4KB

        • memory/4212-152-0x000001F569DE0000-0x000001F569DE1000-memory.dmp

          Filesize

          4KB

        • memory/4212-151-0x000001F569DE0000-0x000001F569DE1000-memory.dmp

          Filesize

          4KB

        • memory/4212-158-0x000001F56ADD0000-0x000001F56AF79000-memory.dmp

          Filesize

          1.7MB

        • memory/4452-157-0x000000001B9F0000-0x000000001BA00000-memory.dmp

          Filesize

          64KB

        • memory/4452-143-0x000000001B9F0000-0x000000001BA00000-memory.dmp

          Filesize

          64KB