Analysis

  • max time kernel
    125s
  • max time network
    134s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    16-04-2024 23:09

General

  • Target

    AsyncClient.exe

  • Size

    48KB

  • MD5

    0712481ec7be68e2f67672b911aebf23

  • SHA1

    527ceb23db13a4e84b5f27a850116bb1421981dd

  • SHA256

    6a26dc7c12eddcdc36e00ca1633eb4f231a433deee4f574122c51690f28a3e67

  • SHA512

    bce33d4a59624ccee236df8b3ff061bd58377dee284e44849471e7afdd9baf7845a91dc9701647ce9290ea13c3f18ca2bda780dce646a28b3c1436ad78d248cd

  • SSDEEP

    768:/uwhFTAY3IQWUe9jqmo2qLwjbovXejeM8emPISZrul5UrM0bfg02Gzd6jq7eDZyG:/uwhFTA4/2pjboOehAgruYrfbfAGzMqQ

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

report-dust.gl.at.ply.gg:28329

report-dust.gl.at.ply.gg:8188

Mutex

9VMpESMh922h

Attributes
  • delay

    3

  • install

    true

  • install_file

    Svchost.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2276
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Svchost" /tr '"C:\Users\Admin\AppData\Roaming\Svchost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1948
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Svchost" /tr '"C:\Users\Admin\AppData\Roaming\Svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:2664
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp191C.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2568
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2668
      • C:\Users\Admin\AppData\Roaming\Svchost.exe
        "C:\Users\Admin\AppData\Roaming\Svchost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2112

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp191C.tmp.bat

    Filesize

    151B

    MD5

    81217d02b452480266f0f881d11baa57

    SHA1

    d252dd4e364eef934494d02e647d2bc80cc456b7

    SHA256

    ceaaea60f5b63a14b151c43461a18071bed8e486c01221d302a4b277531c72d2

    SHA512

    d02d23c44b7f96eb0db4d4573976567d17c489103980700c05f37050cf5c85d332089ef85e9ae5b268f100095cdfb9c27e3fca26388cbdcdd0d1f3c68f25641c

  • \Users\Admin\AppData\Roaming\Svchost.exe

    Filesize

    48KB

    MD5

    0712481ec7be68e2f67672b911aebf23

    SHA1

    527ceb23db13a4e84b5f27a850116bb1421981dd

    SHA256

    6a26dc7c12eddcdc36e00ca1633eb4f231a433deee4f574122c51690f28a3e67

    SHA512

    bce33d4a59624ccee236df8b3ff061bd58377dee284e44849471e7afdd9baf7845a91dc9701647ce9290ea13c3f18ca2bda780dce646a28b3c1436ad78d248cd

  • memory/2112-16-0x0000000000AE0000-0x0000000000AF2000-memory.dmp

    Filesize

    72KB

  • memory/2112-17-0x0000000073F60000-0x000000007464E000-memory.dmp

    Filesize

    6.9MB

  • memory/2112-18-0x00000000003A0000-0x00000000003E0000-memory.dmp

    Filesize

    256KB

  • memory/2112-19-0x0000000073F60000-0x000000007464E000-memory.dmp

    Filesize

    6.9MB

  • memory/2112-20-0x00000000003A0000-0x00000000003E0000-memory.dmp

    Filesize

    256KB

  • memory/2276-0-0x0000000000270000-0x0000000000282000-memory.dmp

    Filesize

    72KB

  • memory/2276-1-0x0000000073FB0000-0x000000007469E000-memory.dmp

    Filesize

    6.9MB

  • memory/2276-2-0x0000000004E20000-0x0000000004E60000-memory.dmp

    Filesize

    256KB

  • memory/2276-12-0x0000000073FB0000-0x000000007469E000-memory.dmp

    Filesize

    6.9MB