Analysis

  • max time kernel
    129s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    31-05-2024 01:16

General

  • Target

    20235ee05aef546e34ddf783007e6779.exe

  • Size

    70KB

  • MD5

    20235ee05aef546e34ddf783007e6779

  • SHA1

    999bda8ca538ef81fd3762cdfdf941253c4890d7

  • SHA256

    f4140df465adf4050ecea61cb9659b757c97f65b8c3cca7afac5a5e89d203c36

  • SHA512

    aa8d92869a44d638f17737d7a477aa6cfcef2dd43cf460b548110417eb6d62258d5285abf3a66fbfe0a44af8414db1cb3335bc04cd0b79d67b86061284fb7f6f

  • SSDEEP

    1536:VmHeyoqqmb8/7kGkbaXtmkcL8U69q4WOZ0B86a:VmHbQTkbaX9FqxOZ0B86a

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %AppData%

  • install_file

    Runtime Broker.exe

  • pastebin_url

    https://pastebin.com/raw/kYPYyCCf

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 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.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 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\20235ee05aef546e34ddf783007e6779.exe
    "C:\Users\Admin\AppData\Local\Temp\20235ee05aef546e34ddf783007e6779.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1808
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\20235ee05aef546e34ddf783007e6779.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3004
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '20235ee05aef546e34ddf783007e6779.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2576
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Runtime Broker.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2640
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Runtime Broker.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2416
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Runtime Broker" /tr "C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
      2⤵
      • Creates scheduled task(s)
      PID:2960
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {3C0C3648-2E2F-4915-9272-467400A03910} S-1-5-21-330940541-141609230-1670313778-1000:KXIPPCKF\Admin:Interactive:[1]
    1⤵
      PID:1628

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\Q9UQWZM6410KTK3WO7SM.temp

      Filesize

      7KB

      MD5

      8474b5a16574b650591fe6e355e77a10

      SHA1

      f0140951c12fe557432801df9680b9c57c7241cc

      SHA256

      6351f8793621279dcd6344fbb1a2d687c25fac13724385e637d8ce92f22d1aad

      SHA512

      fec18fd09ea0ae86f30043539b9f77d5835056b0864222d195196b0348a2b482a0674adb53516ce82d1128c198c0fc28e3761f7579b24b25ae28ae5e93c6026b

    • \??\PIPE\srvsvc

      MD5

      d41d8cd98f00b204e9800998ecf8427e

      SHA1

      da39a3ee5e6b4b0d3255bfef95601890afd80709

      SHA256

      e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

      SHA512

      cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

    • memory/1808-0-0x000007FEF5A73000-0x000007FEF5A74000-memory.dmp

      Filesize

      4KB

    • memory/1808-1-0x0000000000C40000-0x0000000000C58000-memory.dmp

      Filesize

      96KB

    • memory/1808-32-0x000000001B200000-0x000000001B280000-memory.dmp

      Filesize

      512KB

    • memory/1808-33-0x000007FEF5A73000-0x000007FEF5A74000-memory.dmp

      Filesize

      4KB

    • memory/1808-34-0x000000001B200000-0x000000001B280000-memory.dmp

      Filesize

      512KB

    • memory/2576-14-0x000000001B160000-0x000000001B442000-memory.dmp

      Filesize

      2.9MB

    • memory/2576-15-0x0000000002510000-0x0000000002518000-memory.dmp

      Filesize

      32KB

    • memory/3004-6-0x00000000023C0000-0x0000000002440000-memory.dmp

      Filesize

      512KB

    • memory/3004-7-0x000000001B290000-0x000000001B572000-memory.dmp

      Filesize

      2.9MB

    • memory/3004-8-0x0000000002360000-0x0000000002368000-memory.dmp

      Filesize

      32KB