Analysis

  • max time kernel
    59s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 3 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
  • 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 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⤵
    • 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:1848
    • 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:2924
    • 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:2520
    • 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:2468
    • 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:2380
    • 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:1512
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {4127EAE2-2CEA-45B6-BF9B-70458632DB17} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2796
    • C:\ProgramData\svchost.exe
      C:\ProgramData\svchost.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2400

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\svchost.exe

    Filesize

    71KB

    MD5

    6538116da6dcf30ee794597963b20207

    SHA1

    6ff33f12ea69fc818b2b633a46dafc9ac47cd1a8

    SHA256

    81b460bce1126aaeee941fa6fb3945bacd058d56549443db236bd790661dae3a

    SHA512

    ce0cab07f94532a446a72f5b1b3b125a64e03861bb48b48daf5f392001afc72e0f960bc9576515063b7ada294d3b44edd08f0bd618418d4e56c0eb2f65ebaee3

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

    Filesize

    7KB

    MD5

    6b312cb6838810b673f41810efe50d3f

    SHA1

    da9a390dc2b34a755b68d7b00b5f5e6e38100fbe

    SHA256

    0e23a10fd512b937fa2ee82daa32b58edaf597de3723dfd9e4822e2048aef2c6

    SHA512

    bfb2092ab19beb31fd32b7c14e1aad51e8ffbc6e3a8c03a2a94e4866d341c97f7e2173046755efc9070085d735ef2fdbd3a5a0e363247974527b98c079b511f6

  • \??\PIPE\srvsvc

    MD5

    d41d8cd98f00b204e9800998ecf8427e

    SHA1

    da39a3ee5e6b4b0d3255bfef95601890afd80709

    SHA256

    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

    SHA512

    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

  • memory/1848-31-0x000000001B250000-0x000000001B2D0000-memory.dmp

    Filesize

    512KB

  • memory/1848-1-0x0000000000E00000-0x0000000000E18000-memory.dmp

    Filesize

    96KB

  • memory/1848-33-0x000000001B250000-0x000000001B2D0000-memory.dmp

    Filesize

    512KB

  • memory/1848-0-0x000007FEF5A13000-0x000007FEF5A14000-memory.dmp

    Filesize

    4KB

  • memory/1848-32-0x000007FEF5A13000-0x000007FEF5A14000-memory.dmp

    Filesize

    4KB

  • memory/2400-37-0x00000000012A0000-0x00000000012B8000-memory.dmp

    Filesize

    96KB

  • memory/2520-14-0x000000001B630000-0x000000001B912000-memory.dmp

    Filesize

    2.9MB

  • memory/2520-15-0x0000000001F00000-0x0000000001F08000-memory.dmp

    Filesize

    32KB

  • memory/2924-8-0x0000000002800000-0x0000000002808000-memory.dmp

    Filesize

    32KB

  • memory/2924-7-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

    Filesize

    2.9MB

  • memory/2924-6-0x0000000002C30000-0x0000000002CB0000-memory.dmp

    Filesize

    512KB