Resubmissions

30/04/2023, 21:56

230430-1tvcnsfb3y 10

30/04/2023, 21:52

230430-1q9yyseh7w 10

Analysis

  • max time kernel
    155s
  • max time network
    167s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-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 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\Swiftfn.exe
    "C:\Users\Admin\AppData\Local\Temp\Swiftfn.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1420
    • 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:976
      • 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:388
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA130.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:440
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1832
      • C:\Users\Admin\AppData\Roaming\Runtime Broker.exe
        "C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1060

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

          Filesize

          61KB

          MD5

          e71c8443ae0bc2e282c73faead0a6dd3

          SHA1

          0c110c1b01e68edfacaeae64781a37b1995fa94b

          SHA256

          95b0a5acc5bf70d3abdfd091d0c9f9063aa4fde65bd34dbf16786082e1992e72

          SHA512

          b38458c7fa2825afb72794f374827403d5946b1132e136a0ce075dfd351277cf7d957c88dc8a1e4adc3bcae1fa8010dae3831e268e910d517691de24326391a6

        • C:\Users\Admin\AppData\Local\Temp\Tar6447.tmp

          Filesize

          161KB

          MD5

          be2bec6e8c5653136d3e72fe53c98aa3

          SHA1

          a8182d6db17c14671c3d5766c72e58d87c0810de

          SHA256

          1919aab2a820642490169bdc4e88bd1189e22f83e7498bf8ebdfb62ec7d843fd

          SHA512

          0d1424ccdf0d53faf3f4e13d534e12f22388648aa4c23edbc503801e3c96b7f73c7999b760b5bef4b5e9dd923dffe21a21889b1ce836dd428420bf0f4f5327ff

        • C:\Users\Admin\AppData\Local\Temp\tmpA130.tmp.bat

          Filesize

          158B

          MD5

          f094e24751b4c554bbcb22503eab8a64

          SHA1

          2038a1f5191aa89f678ae8933609ea5cd1e29f50

          SHA256

          3a71c41188456cd163735c604682a73582f9d6256a3799a1899dc65d702673bb

          SHA512

          041f8ed6f34af770c66a7dd7460f7da4bb5f7df7de5aab35aa7b8c9eab8ad7e56f3b5f0b3dffcfd493406705159f00382d6a2ea805b16b42da8b88c6ac83f332

        • C:\Users\Admin\AppData\Local\Temp\tmpA130.tmp.bat

          Filesize

          158B

          MD5

          f094e24751b4c554bbcb22503eab8a64

          SHA1

          2038a1f5191aa89f678ae8933609ea5cd1e29f50

          SHA256

          3a71c41188456cd163735c604682a73582f9d6256a3799a1899dc65d702673bb

          SHA512

          041f8ed6f34af770c66a7dd7460f7da4bb5f7df7de5aab35aa7b8c9eab8ad7e56f3b5f0b3dffcfd493406705159f00382d6a2ea805b16b42da8b88c6ac83f332

        • 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/1060-68-0x0000000000B90000-0x0000000000BA2000-memory.dmp

          Filesize

          72KB

        • memory/1060-69-0x000000001B0F0000-0x000000001B170000-memory.dmp

          Filesize

          512KB

        • memory/1420-54-0x0000000000E30000-0x0000000000E42000-memory.dmp

          Filesize

          72KB

        • memory/1420-55-0x000000001B050000-0x000000001B0D0000-memory.dmp

          Filesize

          512KB