Analysis

  • max time kernel
    66s
  • max time network
    70s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-06-2024 16:17

General

  • Target

    EBCSetup.exe

  • Size

    70KB

  • MD5

    97566a48f5b6edfd5871ffddba03bbcf

  • SHA1

    af2ea70e9126b61de4a00d07d66c9d88ea0141a3

  • SHA256

    2e56b940cbb34c5271e8929f64a5632701dfefb09ba311bcac36b2ac0835babd

  • SHA512

    6a67ab96bc9cd9cd0bc64fb49ea5d441ca36678b2b6ae3822939f5c20613e08e3d8a89dd051d0209044c261120fccde56dc352fe2c180dcfce25d7a97ac807ff

  • SSDEEP

    1536:+cYgFsLSD/LW64M/dxKebguogieuG+GrV6GlwOaQUi:+FU9bL5/dxKebguw1G7lwOaJi

Malware Config

Extracted

Family

xworm

C2

bulletingmarrano-44370.portmap.io:44370:3452

Attributes
  • Install_directory

    %AppData%

  • install_file

    RuntimeBroker.exe

Signatures

  • Detect Xworm Payload 2 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 44 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of FindShellTrayWindow 62 IoCs
  • Suspicious use of SendNotifyMessage 61 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 10 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\EBCSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\EBCSetup.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4556
    • 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\EBCSetup.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:680
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'EBCSetup.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:840
    • 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\RuntimeBroker.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3328
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RuntimeBroker.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3208
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "RuntimeBroker" /tr "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:1236
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1784
  • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1404

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

    Filesize

    2KB

    MD5

    d85ba6ff808d9e5444a4b369f5bc2730

    SHA1

    31aa9d96590fff6981b315e0b391b575e4c0804a

    SHA256

    84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

    SHA512

    8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    944B

    MD5

    77d622bb1a5b250869a3238b9bc1402b

    SHA1

    d47f4003c2554b9dfc4c16f22460b331886b191b

    SHA256

    f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

    SHA512

    d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    944B

    MD5

    10890cda4b6eab618e926c4118ab0647

    SHA1

    1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

    SHA256

    00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

    SHA512

    a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    944B

    MD5

    e5663972c1caaba7088048911c758bf3

    SHA1

    3462dea0f9c2c16a9c3afdaef8bbb1f753c1c198

    SHA256

    9f7f29a4696876cadca3f14d7e43f9ede0c97fd64be3f5d94bda49a91b6a419e

    SHA512

    ff4e72c46cf083de62baa2ce2661555dd91b5f144294015f7b262fd4500cb67fe80e1871a82da63b607e3e9cef401f4b73c587bf1134637881ecad51aad1eddc

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_auexl4rf.vew.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RuntimeBroker.lnk

    Filesize

    803B

    MD5

    360965f6aed8594fc3bb587a16c636b5

    SHA1

    8eb91a711066040392759a51128793b9ccd1f90f

    SHA256

    d6d50ea301a29a16266ef9f5edec303e57f00e2fb64e57b6fa1fe2348963bf78

    SHA512

    2842fb8ada7ba43e3829c7151d50d115697822f4ce4bbc6cfce06a04644b1d3c444a6ddb800f84c27394ce7fea8daa33f7036197361de3dfd5c3819470615c7a

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

    Filesize

    70KB

    MD5

    97566a48f5b6edfd5871ffddba03bbcf

    SHA1

    af2ea70e9126b61de4a00d07d66c9d88ea0141a3

    SHA256

    2e56b940cbb34c5271e8929f64a5632701dfefb09ba311bcac36b2ac0835babd

    SHA512

    6a67ab96bc9cd9cd0bc64fb49ea5d441ca36678b2b6ae3822939f5c20613e08e3d8a89dd051d0209044c261120fccde56dc352fe2c180dcfce25d7a97ac807ff

  • memory/680-14-0x0000027ECEAB0000-0x0000027ECEAD2000-memory.dmp

    Filesize

    136KB

  • memory/680-3-0x00007FFF2CD30000-0x00007FFF2D7F1000-memory.dmp

    Filesize

    10.8MB

  • memory/680-15-0x00007FFF2CD30000-0x00007FFF2D7F1000-memory.dmp

    Filesize

    10.8MB

  • memory/680-18-0x00007FFF2CD30000-0x00007FFF2D7F1000-memory.dmp

    Filesize

    10.8MB

  • memory/680-4-0x00007FFF2CD30000-0x00007FFF2D7F1000-memory.dmp

    Filesize

    10.8MB

  • memory/1784-60-0x0000027CCBFB0000-0x0000027CCBFB1000-memory.dmp

    Filesize

    4KB

  • memory/1784-67-0x0000027CCBFB0000-0x0000027CCBFB1000-memory.dmp

    Filesize

    4KB

  • memory/1784-65-0x0000027CCBFB0000-0x0000027CCBFB1000-memory.dmp

    Filesize

    4KB

  • memory/1784-59-0x0000027CCBFB0000-0x0000027CCBFB1000-memory.dmp

    Filesize

    4KB

  • memory/1784-66-0x0000027CCBFB0000-0x0000027CCBFB1000-memory.dmp

    Filesize

    4KB

  • memory/1784-61-0x0000027CCBFB0000-0x0000027CCBFB1000-memory.dmp

    Filesize

    4KB

  • memory/1784-71-0x0000027CCBFB0000-0x0000027CCBFB1000-memory.dmp

    Filesize

    4KB

  • memory/1784-70-0x0000027CCBFB0000-0x0000027CCBFB1000-memory.dmp

    Filesize

    4KB

  • memory/1784-69-0x0000027CCBFB0000-0x0000027CCBFB1000-memory.dmp

    Filesize

    4KB

  • memory/1784-68-0x0000027CCBFB0000-0x0000027CCBFB1000-memory.dmp

    Filesize

    4KB

  • memory/4556-57-0x00007FFF2CD33000-0x00007FFF2CD35000-memory.dmp

    Filesize

    8KB

  • memory/4556-0-0x00007FFF2CD33000-0x00007FFF2CD35000-memory.dmp

    Filesize

    8KB

  • memory/4556-58-0x00007FFF2CD30000-0x00007FFF2D7F1000-memory.dmp

    Filesize

    10.8MB

  • memory/4556-2-0x00007FFF2CD30000-0x00007FFF2D7F1000-memory.dmp

    Filesize

    10.8MB

  • memory/4556-1-0x0000000000D90000-0x0000000000DA8000-memory.dmp

    Filesize

    96KB