Overview

overview

10

Static

static

3

NOSU.exe

windows7-x64

10

NOSU.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    08-09-2024 13:03

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General

  • Target

    NOSU.exe

  • Size

    86KB

  • MD5

    d5aebbb30b6b622ab2f6c0f9956395f2

  • SHA1

    b89cd9e3a2d5baa995c1bffbf183ba3fe48e47a1

  • SHA256

    266ec9b6c8f07ba35e7f7c1223583a6b78770f2647b8fdd1af7b1a5af18d4f9d

  • SHA512

    a1579b6f40c539d233368fd41b1af1226c63c596d19492f7adb0ac26319bac82e4adb8b0fc30c2dd20562a253d195311ab600d25b095a321deaa7fe25b9140ef

  • SSDEEP

    384:G0CpAU8pTNkdSSGC1TdwGNaXbb/UaHgGkE00PIYTNxg9DTUiJFnh:G04AbQaGNY0BY/g98izh

Score
10/10
shurkdiscoveryevasionexecutioninfostealertrojan

Malware Config

Signatures

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs
    evasiontrojan
  • Shurk

    Shurk is an infostealer, written in C++ which appeared in 2021.

    infostealershurk
  • Command and Scripting Interpreter: PowerShell 1 TTPs 9 IoCs

    Run Powershell and hide display window.

    execution
  • Disables RegEdit via registry modification 1 IoCs
    evasion
  • Disables Task Manager via registry modification
    evasion
  • Drops file in Program Files directory 56 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: RenamesItself 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NOSU.exe
    "C:\Users\Admin\AppData\Local\Temp\NOSU.exe"
    1⤵
    • Modifies Windows Defender Real-time Protection settings
    • Disables RegEdit via registry modification
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: RenamesItself
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2084
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -Command powershell -Command Add-MpPreference -ExclusionPath 'C:\Windows\'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2364
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionPath C:\Windows\
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2984
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -Command powershell -Command Add-MpPreference -ExclusionPath 'C:\Windows\Control'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2824
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionPath C:\Windows\Control
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:860
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -Command powershell -Command Add-MpPreference -ExclusionPath 'C:\'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2608
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionPath C:\
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2212
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "color 4 && echo Unfortunately, your system has been infected with NOSU virus. && echo This type of virus is classified as critical and we do not have the means to remove it at this time. && echo God help you. && pause"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2784

Network

MITRE ATT&CK Enterprise v15

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Downloads

  • C:\Program Files (x86)\Adobe\Reader 9.0\Resource\Linguistics\LanguageNames2\DisplayLanguageNames.en_GB_EURO.cm
    Filesize

    36KB

    MD5

    98629fdf433fc01fcdf4518664c62fcc

    SHA1

    5a3d4a47799c558619f3d7049b45d8776d4d6d4d

    SHA256

    84dee4a85741a8f9608ac95002fff6eecfbd6f4bf6fc1058827591d9e256a9bf

    SHA512

    cf4848064179d73523c1623e037df82a6b99fc4b060935cfb9df916be5b179dd8c01f28a5f552bcd4bc9f7dbff7e350bb7dd39add819cfa34ac4dae29053789b

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
    Filesize

    7KB

    MD5

    7afca9a1f317cda5cac56e7639749c92

    SHA1

    89ad73c26d0b0f32c3241e10a2b68fafdb14c9e9

    SHA256

    3ce0183685446869d516e771dc6b024ea1ac764a386de12c6fedea6c814cbbb7

    SHA512

    3e27d06d5d71333121c69a48849165ec1eeb989af439fa9fa270500744c6254c3a90ffb1934c28d530d716ac3c573720c572026a0cf14a159c47fb02e7c95e23

    Download Submit

  • memory/2084-0-0x00000000743BE000-0x00000000743BF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2084-1-0x0000000000350000-0x000000000036A000-memory.dmp

    Filesize

    104KB

    Download

  • memory/2084-2-0x00000000743B0000-0x0000000074A9E000-memory.dmp

    Filesize

    6.9MB

    Download

  • memory/2084-35-0x00000000743BE000-0x00000000743BF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2084-36-0x00000000743B0000-0x0000000074A9E000-memory.dmp

    Filesize

    6.9MB

    Download

  • memory/2364-5-0x0000000071431000-0x0000000071432000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2364-6-0x0000000071430000-0x00000000719DB000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/2364-7-0x0000000071430000-0x00000000719DB000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/2364-8-0x0000000071430000-0x00000000719DB000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/2364-14-0x0000000071430000-0x00000000719DB000-memory.dmp

    Filesize

    5.7MB

    Download