Analysis

  • max time kernel
    56s
  • max time network
    46s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-05-2024 03:59

General

  • Target

    sigmasoft-0.1xw.exe

  • Size

    71KB

  • MD5

    6538116da6dcf30ee794597963b20207

  • SHA1

    6ff33f12ea69fc818b2b633a46dafc9ac47cd1a8

  • SHA256

    81b460bce1126aaeee941fa6fb3945bacd058d56549443db236bd790661dae3a

  • SHA512

    ce0cab07f94532a446a72f5b1b3b125a64e03861bb48b48daf5f392001afc72e0f960bc9576515063b7ada294d3b44edd08f0bd618418d4e56c0eb2f65ebaee3

  • SSDEEP

    1536:XH1viI9rGg/4SHrsmGz+b97iBMNCJN6qO7MrItaPOxU6:XD9rGgpHXy+b9pNUO7MM1f

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:42772

gorodpro-42772.portmap.host:42772

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    svchost.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
  • 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 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 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\sigmasoft-0.1xw.exe
    "C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.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:4604
    • 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\sigmasoft-0.1xw.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4136
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sigmasoft-0.1xw.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2124
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1380
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2224
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"
      2⤵
      • Creates scheduled task(s)
      PID:536
  • C:\ProgramData\svchost.exe
    C:\ProgramData\svchost.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4360

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\svchost.exe

    Filesize

    71KB

    MD5

    6538116da6dcf30ee794597963b20207

    SHA1

    6ff33f12ea69fc818b2b633a46dafc9ac47cd1a8

    SHA256

    81b460bce1126aaeee941fa6fb3945bacd058d56549443db236bd790661dae3a

    SHA512

    ce0cab07f94532a446a72f5b1b3b125a64e03861bb48b48daf5f392001afc72e0f960bc9576515063b7ada294d3b44edd08f0bd618418d4e56c0eb2f65ebaee3

  • 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

    d28a889fd956d5cb3accfbaf1143eb6f

    SHA1

    157ba54b365341f8ff06707d996b3635da8446f7

    SHA256

    21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

    SHA512

    0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

    Filesize

    944B

    MD5

    da5c82b0e070047f7377042d08093ff4

    SHA1

    89d05987cd60828cca516c5c40c18935c35e8bd3

    SHA256

    77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5

    SHA512

    7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_iybjs0r0.gmh.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/4136-13-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

    Filesize

    10.8MB

  • memory/4136-14-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

    Filesize

    10.8MB

  • memory/4136-17-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

    Filesize

    10.8MB

  • memory/4136-12-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

    Filesize

    10.8MB

  • memory/4136-2-0x0000022CA76C0000-0x0000022CA76E2000-memory.dmp

    Filesize

    136KB

  • memory/4604-0-0x00007FFB74973000-0x00007FFB74975000-memory.dmp

    Filesize

    8KB

  • memory/4604-56-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

    Filesize

    10.8MB

  • memory/4604-57-0x00007FFB74973000-0x00007FFB74975000-memory.dmp

    Filesize

    8KB

  • memory/4604-58-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

    Filesize

    10.8MB

  • memory/4604-1-0x0000000000A60000-0x0000000000A78000-memory.dmp

    Filesize

    96KB