Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-04-2024 05:42

General

  • Target

    degrado-lavacrypt-dfgs.exe

  • Size

    426KB

  • MD5

    7d5053287343d71bf9e3b913d4e4e551

  • SHA1

    822191da126f6d18cbc110e02473afb0528751bd

  • SHA256

    48cd145349ebdb8a3728c8c55b9e5a59df2ee7676a847afa340d7f88ae24cfd1

  • SHA512

    801a414806c2ff4a8db764dd4d1fa9b2ad06ac7976fd5a98079362c33583dce246f95dd76427f911d0674d07d3ebd26085773653ca52ba779e2707f202428bd3

  • SSDEEP

    12288:qoE0Q+9PzNEAVTH2BKlYZQ/yKrFvM/2SwJ:F1L9zLLCKlAQqEva25

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

BSOD_New

Mutex

Mika

Attributes
  • delay

    1

  • install

    false

  • install_file

    UpdateTaskMachineUa.bat.exe

  • install_folder

    %AppData%

  • pastebin_config

    https://pastebin.com/raw/F7c4dqk3

aes.plain

Signatures

  • AsyncRat

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

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 2 IoCs
  • Looks for VMWare Tools registry key 2 TTPs 2 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Windows security modification 2 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Maps connected drives based on registry 3 TTPs 4 IoCs

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

  • Suspicious use of SetThreadContext 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 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • System policy modification 1 TTPs 1 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\degrado-lavacrypt-dfgs.exe
    "C:\Users\Admin\AppData\Local\Temp\degrado-lavacrypt-dfgs.exe"
    1⤵
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Adds Run key to start application
    • Maps connected drives based on registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2484
    • C:\Windows\System32\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:784
      • C:\Windows\system32\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:2244
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5469.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1924
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:820
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • UAC bypass
        • Windows security bypass
        • Looks for VirtualBox Guest Additions in registry
        • Looks for VMWare Tools registry key
        • Checks BIOS information in registry
        • Checks computer location settings
        • Executes dropped EXE
        • Windows security modification
        • Checks whether UAC is enabled
        • Maps connected drives based on registry
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:4796
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\svchost.exe" -Force
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1860
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe"
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1832

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dikm1vve.ib1.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmp5469.tmp.bat

    Filesize

    151B

    MD5

    2af23035c3976902a75eb41fc5b92acb

    SHA1

    9ece309b08ce9b6f6670ac5b9000a4cfa0f41839

    SHA256

    c115bb107ac4fd646822f81724014eec502f00e5ce560193a46314f5ee0efce5

    SHA512

    961cbd2cfa6389aeeea2781ca2cdc9f76f8ade019fa88ff8c8972695efc4ce132fdc086e57096366d8576d550075c82b17d38f4601cdce2ce684784e100ec54d

  • C:\Users\Admin\AppData\Roaming\svchost.exe

    Filesize

    426KB

    MD5

    7d5053287343d71bf9e3b913d4e4e551

    SHA1

    822191da126f6d18cbc110e02473afb0528751bd

    SHA256

    48cd145349ebdb8a3728c8c55b9e5a59df2ee7676a847afa340d7f88ae24cfd1

    SHA512

    801a414806c2ff4a8db764dd4d1fa9b2ad06ac7976fd5a98079362c33583dce246f95dd76427f911d0674d07d3ebd26085773653ca52ba779e2707f202428bd3

  • memory/1832-14-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/1832-39-0x0000000074B20000-0x00000000752D0000-memory.dmp

    Filesize

    7.7MB

  • memory/1832-38-0x0000000005B80000-0x0000000005BE6000-memory.dmp

    Filesize

    408KB

  • memory/1832-32-0x0000000004FB0000-0x0000000004FC0000-memory.dmp

    Filesize

    64KB

  • memory/1832-27-0x0000000074B20000-0x00000000752D0000-memory.dmp

    Filesize

    7.7MB

  • memory/1832-37-0x00000000060C0000-0x0000000006664000-memory.dmp

    Filesize

    5.6MB

  • memory/1832-40-0x0000000004FB0000-0x0000000004FC0000-memory.dmp

    Filesize

    64KB

  • memory/1832-36-0x0000000005860000-0x00000000058FC000-memory.dmp

    Filesize

    624KB

  • memory/1832-33-0x0000000077581000-0x0000000077582000-memory.dmp

    Filesize

    4KB

  • memory/1860-21-0x000001C0E0520000-0x000001C0E0530000-memory.dmp

    Filesize

    64KB

  • memory/1860-26-0x000001C0E04C0000-0x000001C0E04E2000-memory.dmp

    Filesize

    136KB

  • memory/1860-15-0x00007FF802950000-0x00007FF803411000-memory.dmp

    Filesize

    10.8MB

  • memory/1860-31-0x00007FF802950000-0x00007FF803411000-memory.dmp

    Filesize

    10.8MB

  • memory/2484-3-0x000002BE25390000-0x000002BE253FA000-memory.dmp

    Filesize

    424KB

  • memory/2484-2-0x000002BE25380000-0x000002BE25390000-memory.dmp

    Filesize

    64KB

  • memory/2484-1-0x00007FF803360000-0x00007FF803E21000-memory.dmp

    Filesize

    10.8MB

  • memory/2484-0-0x000002BE24FA0000-0x000002BE24FA8000-memory.dmp

    Filesize

    32KB

  • memory/2484-8-0x00007FF803360000-0x00007FF803E21000-memory.dmp

    Filesize

    10.8MB

  • memory/4796-30-0x00007FF802950000-0x00007FF803411000-memory.dmp

    Filesize

    10.8MB

  • memory/4796-13-0x00007FF802950000-0x00007FF803411000-memory.dmp

    Filesize

    10.8MB