Resubmissions

30/04/2023, 21:56

230430-1tvcnsfb3y 10

30/04/2023, 21:52

230430-1q9yyseh7w 10

Analysis

  • max time kernel
    1798s
  • max time network
    1802s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    30/04/2023, 21:56

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:1388
    • 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:560
      • 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:1164
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3554.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:628
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1924
      • 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:980

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          62KB

          MD5

          3ac860860707baaf32469fa7cc7c0192

          SHA1

          c33c2acdaba0e6fa41fd2f00f186804722477639

          SHA256

          d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

          SHA512

          d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

        • C:\Users\Admin\AppData\Local\Temp\Tar9B7D.tmp

          Filesize

          164KB

          MD5

          4ff65ad929cd9a367680e0e5b1c08166

          SHA1

          c0af0d4396bd1f15c45f39d3b849ba444233b3a2

          SHA256

          c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6

          SHA512

          f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

        • C:\Users\Admin\AppData\Local\Temp\tmp3554.tmp.bat

          Filesize

          158B

          MD5

          624ce4441d0ca2b99daec192a7a047d8

          SHA1

          42a0eaa983ca28d5a49372e455ad8808176d7a6d

          SHA256

          fce80830eba5ac4c20cfe6284ffd9a7842b23a0d4f807e5fe03dde09248dd78b

          SHA512

          4c150e28f04d5e32b7d586f974027d5e37a7c4f5524e2b7e8386e9cc4699e5354849d005d796d3fc40ee21978ba1b429e4f3b5b41c8dcb585b8e0814e09f5287

        • C:\Users\Admin\AppData\Local\Temp\tmp3554.tmp.bat

          Filesize

          158B

          MD5

          624ce4441d0ca2b99daec192a7a047d8

          SHA1

          42a0eaa983ca28d5a49372e455ad8808176d7a6d

          SHA256

          fce80830eba5ac4c20cfe6284ffd9a7842b23a0d4f807e5fe03dde09248dd78b

          SHA512

          4c150e28f04d5e32b7d586f974027d5e37a7c4f5524e2b7e8386e9cc4699e5354849d005d796d3fc40ee21978ba1b429e4f3b5b41c8dcb585b8e0814e09f5287

        • 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/980-68-0x0000000000EC0000-0x0000000000ED2000-memory.dmp

          Filesize

          72KB

        • memory/980-69-0x000000001B1F0000-0x000000001B270000-memory.dmp

          Filesize

          512KB

        • memory/980-87-0x000000001B1F0000-0x000000001B270000-memory.dmp

          Filesize

          512KB

        • memory/1388-54-0x0000000000100000-0x0000000000112000-memory.dmp

          Filesize

          72KB

        • memory/1388-55-0x000000001AF70000-0x000000001AFF0000-memory.dmp

          Filesize

          512KB