Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-12-2024 23:40

General

  • Target

    800f43358964117f685e3548d0a71d7d519131c3dff3cbf9fe2efb38d29c687c.exe

  • Size

    1.2MB

  • MD5

    f45dfec03714aad85cae5ada0ea1f104

  • SHA1

    d1f589ed4e83dd4d1ff28c29433cdf9b5c944d88

  • SHA256

    800f43358964117f685e3548d0a71d7d519131c3dff3cbf9fe2efb38d29c687c

  • SHA512

    1175cdd12c7ac6ff29be17097dc0e604f89c7550068ee41f3ecfe8daa89cde813269ad1e432bcf6640c57313ba86dd8c92223fceaf4bbaafa8572a789ea19f33

  • SSDEEP

    24576:eAHnh+eWsN3skA4RV1Hom2KXMmHaW7aWvCaFg5a7PCmWX950:Jh+ZkldoPK8YaW7CaZ7IH0

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

redlanhopto

C2

redlan.hopto.org:5553

Mutex

d25d360449d7bab3069e1b77b3a914a3

Attributes
  • reg_key

    d25d360449d7bab3069e1b77b3a914a3

  • splitter

    |'|'|

Signatures

  • Njrat family
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 2 IoCs
  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • 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.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 27 IoCs
  • Suspicious use of FindShellTrayWindow 9 IoCs
  • Suspicious use of SendNotifyMessage 9 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\800f43358964117f685e3548d0a71d7d519131c3dff3cbf9fe2efb38d29c687c.exe
    "C:\Users\Admin\AppData\Local\Temp\800f43358964117f685e3548d0a71d7d519131c3dff3cbf9fe2efb38d29c687c.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:4708
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3412
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe" "RegAsm.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:5000
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\SysWOW64\schtasks.exe" /create /tn igfxHK /tr "C:\Users\Admin\AppData\Roaming\chkdsk\data.exe" /sc minute /mo 1 /F
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2800
  • C:\Users\Admin\AppData\Roaming\chkdsk\data.exe
    C:\Users\Admin\AppData\Roaming\chkdsk\data.exe
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1504
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1564
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\SysWOW64\schtasks.exe" /create /tn igfxHK /tr "C:\Users\Admin\AppData\Roaming\chkdsk\data.exe" /sc minute /mo 1 /F
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:4780
  • C:\Users\Admin\AppData\Roaming\chkdsk\data.exe
    C:\Users\Admin\AppData\Roaming\chkdsk\data.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1672

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\chkdsk\data.exe

    Filesize

    1.2MB

    MD5

    73f67617cd184818deeb3fb9aac5046e

    SHA1

    291fea3790800c8f285430b633e86396da6d07c9

    SHA256

    bde3fded70b99fbecfdee2423e7e82c5933c471ba97310e5880818439fde7312

    SHA512

    cfb6c1d567ad657c58f9bf8a5a845ee3702902820f1138515009e298170d7c0deae853f03143664c661f668166733039f39ad474257a23a0919e8ce620060ae6

  • memory/1564-16-0x0000000000400000-0x000000000040C000-memory.dmp

    Filesize

    48KB

  • memory/3412-1-0x0000000000160000-0x000000000016C000-memory.dmp

    Filesize

    48KB

  • memory/3412-6-0x0000000074072000-0x0000000074073000-memory.dmp

    Filesize

    4KB

  • memory/3412-7-0x0000000074070000-0x0000000074621000-memory.dmp

    Filesize

    5.7MB

  • memory/3412-8-0x0000000074070000-0x0000000074621000-memory.dmp

    Filesize

    5.7MB

  • memory/3412-9-0x0000000074072000-0x0000000074073000-memory.dmp

    Filesize

    4KB

  • memory/3412-10-0x0000000074070000-0x0000000074621000-memory.dmp

    Filesize

    5.7MB

  • memory/3412-11-0x0000000074070000-0x0000000074621000-memory.dmp

    Filesize

    5.7MB

  • memory/4708-0-0x0000000000F30000-0x0000000000F31000-memory.dmp

    Filesize

    4KB